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 0x86654bc49b98148f2cb64aa7895ea0c7e4da8d40bfcc15326808268dfdb9676e. 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/a7270640-2a28-439e-b974-3543bd3c52b6.json and https://artists.proofprofile.net/proofs/artist/a7270640-2a28-439e-b974-3543bd3c52b6.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 0xeb343422451a610b2038f0761f38a1bdbd80c9c19412f0c8661c2533b29eedc8. 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/QZZ8A2357621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe93886a6c88a38dfefea219e88dc88dd30c97d927a7e2858344b546dda06f74. 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/QZTV32328303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee2ffc9d406af1bba5c9310b9143f181e78a7c04586eb8dc10926db75ec77e. 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/QZWDE2397726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885841b374bfb64b277d29e048bb1cb18662a8de3c5dd5a54859e8fc1f457556. 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/QZZEC2323412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2d7435851771eddf1dff68ea121202cf4676f3c49fc12615e7d9484f60dfd3. 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/QZZ8B2398620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42951d4254cb1f95910851c4523fe4df76217cdc3ed3d57213ae6fc4e8d4b74a. 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/QZZEC2323417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec782efde70f9145331e9ae387abb12413b17f475c2fa63777d85e40123d86a5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZEC2323418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd904aa5db6ec7c3adc524afd5c7bbd62663d0ea23f52730161dc3ea3929f03a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZEC2323419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c70fc242adf98c5b8d15f0a681d49bc09c4806e5c9c2899c502071295e6f57. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USHM82130260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970395d2edb1a4798b91861107beb8a4800cd04441d0d05ee73f4d4102b60b40. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM82130261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c477e8895948d6efd56c78d7a55d8f4bdc932df84b4e0c99cc3870cd651b0b. 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/USHM82130262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad7a3ba386bfff89e2de1eade939354807ea86fd0a4a5e7eccb09852e5a3a2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM82130263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03b76a6b6293116b314a6d28941ddaf361173f79caac2ce17a158fdf0ec83dd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM82130264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb8380e035abb54ce21c7f3059b07b4d856dabbc0a7f018d2f161cb50af5fe. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM82130265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2067a6cd8af0593a5430cc2c2e0cc0bcc93b083744e649d9e8b13f4c6bbdd979. 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/USHM82130266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7a2ee06bb6d3a6a89dff6bac50384a5c4bf8f2a075a615fac117dd85b44a26. 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/USCGJ1951334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3065add036e7b5ced1bf04758ddead9602da99f088a2fd212a1bd862980f733c. 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/USCGJ1951335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ced183333548459ec7538bfa5568bca9faa32ab245d90fbfb0a2c4120eda8. 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/USCGJ1951336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2eb104a34eda0a3940d133dd6f2ad18179c69fb10e8d1dd81c8c0581a9811. 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/USCGJ1951337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d530e87b078795fce0bb507ddb7ae6cbb695ee34d2138f1121972fcce6480a. 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/USCGJ1951338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b2494b8bf1b5e2c6d532affb112afa61f3111728e27c45c23f5b39a783602b. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USCGJ1951339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8413568cc289c32c049c797d92b4a6105d621f17a472eca4615ebe955d7b84b1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USCGJ1951340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e74ee98ab1d8ac73029e928c139273477e662be4da64767007af156332bbab7. 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/USCGJ1951341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29527ced643004fb995b4097e868e4d7781f00b61b68a1a793d867c7f4a1294d. 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/USCGJ1951342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8ba800ee7a10265f365f066b7f62f42a375a5b84b581d80b97531a6da04706. 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/USDY41789639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde7a18cfc369f0f171155b29d1ad59eb37b50b5bafecb7952602d014d85c8ac. 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/USDY41789640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d759cb542547abfc6ef9d75a495bbce89d56379c117110d98aae6cbf5623335. 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/USDY41789641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d937baf981da2b57bf508698f82ada2b778df7a45e877307990afc2a5e1d81. 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/USDY41789642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e0495fd9638f27600a876d97ddcc5ec25bbcbcea2adc36a77a8ef9b703b59f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USDY41789643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a7d4805e42e9b612a1db9d14729ae0deada1fa7480966ee0748aa0a6d118b. 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/USDY41789644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07000c65ff2ef50e453711293fa0c571ddef5117a24fb9949e50811d86dcc95. 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/USDY41789645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2d7435851771eddf1dff68ea121202cf4676f3c49fc12615e7d9484f60dfd3. 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/QZZ8B2398620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb343422451a610b2038f0761f38a1bdbd80c9c19412f0c8661c2533b29eedc8. 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/QZZ8A2357621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee2ffc9d406af1bba5c9310b9143f181e78a7c04586eb8dc10926db75ec77e. 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/QZWDE2397726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe93886a6c88a38dfefea219e88dc88dd30c97d927a7e2858344b546dda06f74. 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/QZTV32328303.