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 0x83d4ffb03058f97840a4bf86ddf48dca96090745a963e86313cf07135925850f. 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/27599a24-b6af-4613-ad23-b26b053d4e6a.json and https://artists.proofprofile.net/proofs/artist/27599a24-b6af-4613-ad23-b26b053d4e6a.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 0xe1522709a2f16ea98a3b21c3a0ea5085ff574d4eff6114f3c91e7b2815525a51. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MXF069800737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126577492bae3f7c691ca145c34f79bfe4e60884db35f54ced0c74e139df9a4b. 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/MXF069800738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1fb3ffe94c40009612df1d69874422a87341e0fa154ed00995d56f08228fa0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USANG1906594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceff0c66d64eac09c932fb055d218a85430e37a2e6ac4e7a073408cb51e854ea. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USANG1906578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c1b56bb19fd664171ae483ab39860d3afdc0238b47b66177ab8bc773135f3f. 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/MXF069900538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b641809346edd3e19202d362121f8714674de54d560eaf5d203f3d3410b0eb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USANG1906548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72cd4c52a415b0be63c0d37440cb3dcff72692d832b9260e091bd53a085dfb0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USANG1906550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21d1d045d881b60891fbe9db747586fbd4065ddc39f163607dd07cd09d32240. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USANG1906551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d19e3a576cffcef750972f4b85004e18c5f3e0a099684ebed919162f6c6385. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19964bea6c54212fb0fd270c4e8cd879436d7f91be3a97ddb0ab2e8d4c7ebbeb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6DC1880907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036aa79423eccf4d52bd140b679749ff6299bee27dc6aaff0b086c74e564672f. 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/QM6DC1880896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf63982fb963c521dd9e6124a60fbc1bc899ce452134bdced06eb13346856eb6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:25Z), 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/QM6DC1880902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2552f363bc58cee87ce42ca34219368ebb1ead1de327f362af6071ab8729a588. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:43Z), 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/QM6DC1880899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf6438d179f32e38440a00f47234817bac94fb63538fe447f4db4033cae98a9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6DC1880894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4d8e2f9e78dedf00ba59fb804ac925625a708d26dc50a837b36bafadbd20a8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:37Z), 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/USANG1906611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa745dde86ce89247685de52ae0b26336e57e8a4675230d9936b97eee0aa5a4dd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:09Z), 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/USANG1906612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fbfbf61393e4715f5bb96c95875b88b69c7434f6123356defa8b3424e59fc7. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USANG1906613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5a2e0f4b6e5e55603cdc7913fd9aae82eb052d14010955ed344d630050c186. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:16Z), 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/USANG1906615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123345513cdf4f53588cc84425f995eec5f4b14854c24bb5da12b2af57741960. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG1906579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb276999a4cccaaa79c3275d0cce8494e72a823702b7de1eddb8770a5ca15ee6. 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/USANG1906586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6bc7db1df668e0af41e39e664b5fea0d97266ce0950c6eb3a91e9905d2c630. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:19:46Z), 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/USANG2034414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fe889113eb496a168f25ce09c537d9bdc674c091279859115bb1cf8bc676ca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG2034424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32008cc75c6593f8ad886a7d6c6cbf75606831e415f0d79a577028209829f5b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZDQH2350555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39282ecd3234d6b29dfaf1f45d738758dd06b38a5f776c468a45071f494ab2b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQMB2107191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa2c700371a212ac6e0285994f426b4129ad3dda3294328d734ae47540ec66b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZDQH2350554.
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 0x0c1c62966e03c0d39c8f277f8d0062de7a15ea38436f7c4cb4f94766fa3f8e25. 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/QZQMB2107175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfde089366cb42ebb81130449f35f73881dceb9ef83a40a87505bf6875577867. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZQMB2107184.