1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f9af841e31ece97ebcc2764771ee3251f18d8dc80966bc44a9ed1f2046a3ee. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71c92a27-0764-4b73-b0d3-4c46df61a267.json and https://artists.proofprofile.net/proofs/artist/71c92a27-0764-4b73-b0d3-4c46df61a267.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5cd6cc2e75fd1fe1483a475864781373678e1e676f7aa32bcdeb9f2123017a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2304583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abca4a22017e0fa46e47ac291a6e1472214758018c3fcad81e578fa43f09641. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2311870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3f5b379f49c28ea92c041349b119e86ced98430b7eebb9d165be179c34ec1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2342118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fd84e8788c2260de4f1349808cf08cc45b7826d98f4be067c7099995323b67. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2487130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6753d06c5155cfee1dc129c444e96ad4d9973a6ebeb375a58bd40d42b618a3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2305426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771ddaa8d31c12ade07323d1f0fbed3232b5d2b716ca2d5aff0508183c014da0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2503256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162861d987043477e8aa2176530f9a62e169a96ff0bfc21dac665aae2f88c49f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2503255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3879dfad0919e259e05f4c8b2a716dfb57b9c02ed75521331d50340ccda1b64e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2503254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59f3c0d7535cd8ad606b5cfeb3e056a321f77af07c201ce6f116ba654cce91c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2500565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c208bf0a1fa4a1675dbc25b9d7006a66462a173aa6d5b098b172dbea1be0e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2500682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d34961045aa6560a258ccac534a0be6d4e02e68b62a02088081ed47e142c0a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2414603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1fdf0d23d8c93fed3705bcc907dafde4c88c1fa2f02dfbbff784baec271b7d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2412007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f7ae1ad9ebb42fc841d5ba9809fabb99f7d975d254e93e0dd50bd0e305dc71. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2499816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7511a4328d4e56d17447682396b6121b01ce5f32022a628cd7944045e99039da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2499547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c49729f9a21455c052ed2351ca107409051cef66c65f668c142283f5d9ab2cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2496361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8403a678ac820387613afde100d3c494147343354c0aeda9b9508ea416cffa93. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2489449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80335286ffacbb1df01dc22e68f7aceb44f14ebd23d6edc4dd1b4ce4a41a5ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2488867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba772d0206fb77157d0503db92a249722f9187d4923c1c2395a99abe06d0acc9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2488286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d0a819600fb9ad0c7559922a000ae72f6c83b4153fa0fb552a94b04a4fc76. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2482530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7238b99e7ba35c2178af6445e7914e3753392f33029c4f4ee7f08fbc196f2ffb. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2463690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e341c266f6dd414c08767154759bfc6204a5be4095fb56d4f8206769ab59f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2459537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bbf20c85584a9d39aa653520c14e266e918210af755b687e7ab9c3591b7cdb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2457424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03622b6c4c1b3a4f76949abbe980364dc9e705ea0d8dcba54be161176af6ec4a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2348405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31486259bfc5065e261c341f483e11bbafb0dbd650a9e8f2c124e26e7283a487. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2339649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7454e8123c91b107745208eac820313294640b5691052182d7b3c24fad592875. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2329834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552521691cd0bfca0987a9f88cbd265fe03d10b28841c308a9d374722711157e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2324915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c8e1ddb99371e8a330d838ad6083b9f8bc1e604c72fd3723c6378ac7657932. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2321260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ce60adb961bfff49506b8bd97dd1b724dd8c688152067c2385dff5fc3d0247. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2316506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765a992d169fe64fc885cc3c32607bd2a1d53a916d24bc394185683495acd131. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2312715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb229f44c38ab74e70f013ad2973b27ec88d30b9b567c0dde4278455913b32112. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2312748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914a22a985016ce43c71ecb8634e8f0f22e005290f447082d8283271a5360689. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2311696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9ec3db4b254f054ea1e68fcf5f14ebc7a948765c902cd36738568f2861118c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2310614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f8958f6f3a8c968e648d409282f558ce0fe9c6d4646138b59a7e39bf5fd1e8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2309606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816b4f9a711348cdf9f736c13090b455fd6293c5e8125e315974ef8482fd1445. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2307839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc78789a88571d9a4bf705fce0c388d59727241ec6e9ca40a3889737fbe4409. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2307350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aaf4acbac8121097779c2feb53c8b1a41a7116f836b1ec166f5dcd21e0a46d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2305416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87285d1038f83b37309da2830ade4c59e248d4efe0dc8ebd9f1b5d958d21f61. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2301286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9babd9f9a23043b045ca7d426451427cb2a7e81f9e3f0215be8286c0827f540. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6N22196193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4d9ed224cca0f1b2f2e26485d273fda7edf41311a7e91443d23f59a44f540. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2201608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306b7949890b79d57b768ed9bfe8f7b283aaba8e663b236585a684c85d27ab55. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ92193336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a130430dc1556151565e21681b067d5f5b74b4d6a63eb7119952cd8c77c7c2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ92194798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6643e149896f15f498897004c3889b931347bfc5f4c6fa58adfbb1f7211cc7f1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2204086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d8f1facbe9b65ba208eb1193f9f22443d438883f446523b7fa31fbc6163d95. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64E2327247.