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 0x8d92831c9bbf9e2c5b359bf6765f0fa0e2b63e55f56097a179a94dfbd0330c73. 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/32de87fd-373d-494a-845a-0cebc3774b4f.json and https://artists.proofprofile.net/proofs/artist/32de87fd-373d-494a-845a-0cebc3774b4f.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 0x21264a725ac155401d603da233e2c156396b6758fc3330d68d4612bece20dfe9. 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/IL7532413071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbed707f1b73f36b758dd33a826bb0146003223b2c38e093082ff2d96fa99a3. 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/IL7532413247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce641a09f0edea9e3042ca95d5e2abc17efaf9053399aa5266cf230f1033d05. 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/IL7532413249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeee8168ec703ee1b6529dca5dfd4526316c897b363ce40249f63566500431f. 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/IL7532413175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383782673b36db74508ec39c311af716008c6d0656de5cea2ee8b196fe607534. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IL5842238372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834d299c146bf5900830044365995aea518add2a320ba5565411ffe874bafeee. 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/IL5842445029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec13a74cae653962d0fc2966f84f5cfc536136a52626a794c3e236dcf66d23b. 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/IL5842028145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5f86c874d3683a4554a93bb85dcd17647c5590ede552f9858f66da0158e21d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0H2413045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a041adfad9ff3fb33d43fca08c348bc4ed69413f93877495df1f0c3752f07fd. 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/DGA0H2413046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe7b4dc040c5b9f277fbc7f3220dcca4bd8a361bd306832ddfaec86e6b64bd5. 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/DGA0H2413047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4dd70ff12d53dc7b37558c8e18cb0871cade0510fdd4a9438fb9f63cca7f57. 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/DGA0H2413048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ff8e0200b46e728a65a0c952dfd47ae40b78039986b753373bb1210a80a71d. 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/DGA092361984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d251308685730ac535bf9b8c3d9acdb970e6026d2299ded79e54d6c7a7351d. 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/DGA0H2413049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd03f2e98e755c6b3caa2d65bbf9ddbdcc39f055748505cb10228bae19e80e3. 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/DGA0H2413051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb5d02f77aa285b2f202fe6e91a3ead6b2643803314c49091b4b6c49e2f09ea. 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/DGA0H2413052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d89c0cfccd1dc6a31dfc1cc4b452e683711c345eb09a04e2729371ed344c0d. 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/DGA0H2413053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0675a0501a0e24edd70e7d8bd51dec828cf3bd9092dc32e75446f2dd824c0c37. 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/DGA0H2413054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc0af10fad01700b59344deb17c737e8fcd062c691a013900879d4cbdb4756f. 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/DGA0H2413056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7634eeb8029d4e9681883b70c0add231731266cee84c33fa1b9df589f34b4cec. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DGA0H2413057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f115f6cbe9a9dd66bee1e8547fb04423ae3ff3a6e50e1b07d96ef6b4aaee26e. 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/FR10S1801507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214691025b35d16bbdac8de590e3b227cf73db5e936bc35782aad9f33a2a8a45. 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/FR10S1801510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3542bc1f096e52d560227b9439d4b5d68585825872f09793610f3a7bf7a2dd. 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/FR10S1801512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0699313a065b976542b1a0d329390536bcbc0b973c88f2dc35a0e9232d13258d. 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/FR10S1801513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983be8ed2b3fd3eab3ce5013ed80bb6a0122a67e57f6d7744926b791213eb1eb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR10S1801514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac4905c3321fda8ca4639851a9a9d78ad8e361352ede958bbdbc8f47ede4671. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IL6192101670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e0c1a3bfb24b0048154165627c38b8b0a60cb0594b25ae97d36a0b4ff941c. 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/IL6192100630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb181b38a189434cb8dda09688d3e38876224a8d0b0067c8bba76e9a00b9865ab. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:41:23Z), 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/IL5842132315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fed02e0abf8df546443cea1d0fe274683685ac1aaac0584cd29def7b1cf4e3. 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/IL5842132316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975942bbdbc5df6890a7eba742e46a5629823163382d1a5b07ccc5641eb544d7. 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/IL5842132317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83af3b6bafbc72a74597b2829c4e486775ed785ff162591d2f4de24295da116f. 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/IL5842132320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc895b7bc41f966c780139745375ec985124dd9cc72131640be42e51153169c41. 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/IL7532413080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621a6818527d32770f29233df4fdf6d07964baa850cb3547f69ad31487ef2c97. 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/IL7532413081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78129a51a6a39b83d902b193110c9275b41753ae693e557dcbf84ecfb5d20073. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/IL7532413082.