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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b03fa857139902c884c855f8cbec169e8ea891a276dad08560bea9d0199cd3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c77afd3-518d-42a7-a952-4101de9fb7e7.json and https://artists.proofprofile.net/proofs/artist/7c77afd3-518d-42a7-a952-4101de9fb7e7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e8e9439d179ef47c521cf6cf81f13abdcefa786aeb5e7c2bb7054f6869cf0f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNMW2239497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adbb25b7687ba1f7c7b95f54f04974260b0728f1fd786f0ec5411c422e960ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNMW2239504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a348a6add61d0319ea2439b28b069d7f18617a9089c55b9392caf3706159fa0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72309027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9677c6a541d3e5d9127e370011a2fa1e0b6f2b559b085d78a03218db6d4ef6d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN72309030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7c0e543d2bc903536ace412a2c604231ee288c8e78db2f35df07b6eb58f4ef. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:13:07Z), 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/QZK6M2308482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afa2e222a8523714d1ee20a9b41735de83236d5236cb8425bc565f33b6b84e5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6M2308483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657bc296c2df4f1b633156aeb67f94218db4dd3c5d4037fafcd200a86169239c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:49Z), 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/QZK6M2308490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d0031ad4822613762e4212192f7ec58e0de3c7a3320619daa2143ea750050b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNWQ2301967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f54272819dd79d00d68717a2dd778c1ec61d8333e9246c7868dd949e75f856. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNWQ2301968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b5e7b3a56c26b350df66895f9c59019454b54a035864001afc834b7aa40d93. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAS2390939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad94671acd434d3cf5b13765deb4bdaa7c5198ff7e9ffa223f2c238728dc53e6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:51Z), 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/QZTAS2390945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c034f838fd35e308f599306c2540108773d09966cf5db9d3e1397c64763604c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFN2319814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f7aeb132f2f826ff6ab1bad3b82ce8a9287e12936dc3f54e47d097cf1aec7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFN2319817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4a4b77fb2c54aeae0bdbd99e2eb4ab42a83635036631ef45dddc97c5b61502. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFN2319822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a5bee2369b080b69f801373b87cc3b8b199e8cd59ec395c9f3ae48ecd6c4eb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2400924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d0c87e2833a0113377920bdd3c3a34400e910fc05d7a85299241b59d699393. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZK6J2476486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316018d35ddc8d07c541aebab768e9c1d960c0cba8e7f2d361062f4fa9a74e08. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6J2476490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3fcfd42549f8e27fb23bc48ab01202e8651102b0471c6b1a3dceee9b3ca1fd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:05:53Z), 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/QZNWV2452621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294e873a34530df5dd60b9ee9f6f622d0b5848f1f84a7bb107abd24b6a8804a8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWV2452633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2826e5c9000824698ac0540c483a21a9a730445141aafe9f6b0a911fe063ea. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWV2452637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3438d3829d73e8ec287e2b2c071cc785327a38400ea08c739370ded0cbc459d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFF2462437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cd388d2845a481f1e7d0d9dbabb720ec742e9e4f08b6a9c47d13bc11f56d76. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:55:44Z), 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/QZWFF2462441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1057de5fecb9d23f86dc3b49cfa791c99b33875a62388b0fb8f551f8e944477. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:08Z), 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/QZFZ62522085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8e217151e52db6849428ddef6495ca214d74126c3dce36895eaac676b1623f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6M2566939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458cae58fc36699c972ce5b69033b0ee03379a8ec438b2efea5cf2bd02bad9c1. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZK6M2566948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e35b4a89de66bc10c628849c032f413344f1172cbc3c7e275819a83d29386e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:21:26Z), 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/QZK6M2566953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381e9a2988ede4fcbed4155bf532228bf3697adfe892aa1dcfe3e3b2cf0c67d8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZK6M2566963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9daee5223d3e0c6522d71b8759e1e18ec632a29d84ab5e1720cdb022d499281. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QT6E72517082.