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 0x3be7139a8bf0e10052558fed2744599d9057b564a8aa9030af262c7e5a4ebc6a. 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/56c63a0e-577d-42a7-9308-4e4733da348e.json and https://artists.proofprofile.net/proofs/artist/56c63a0e-577d-42a7-9308-4e4733da348e.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 0x7a5d8cfb551b9266d533690c77b9370d6af1badf0a9a4136045065b0043f0ea9. 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/US4M31004861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108c85fa9541cfda7f86b477192491292409a9a541f7e20f4f1515b10e6728c9. 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/QZFHU1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad94e54db13f2eaefd66336858840f1e7180aa66510ece31617b6f03868422e2. 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/QZFHU1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e7f9681b78e1117ee0ff9bce4573c6b804e8e4cec22f1cf95bb946d0602c40. 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/QZFHU1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660e5a933d3890692df5d2cd313e596cb45605e4e28aec484a72e3de08d90efb. 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/QZFHU1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c5cf3bfb1a277af6b834bdf245c30cdbdd9a6e494c52431c498fe579d03f42. 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/QZFHU1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437b3071925c6057bd8ab850d5fb4382b0579c6084ddac313bd24754e2cd1ace. 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/QZFHU1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf10e6cdbc0abdcebd59ffee857b89e0282056fe0b820dc79686a53aeb60828. 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/QZFHU1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7718e74350048c3da4923f0bee83c4d6e57dd48368c8c523b010a7ccc4d28ca. 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/QZFHU1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fa0bae6c2b2eb4917f76f6266f6413a1c6b4ff185afa78329739b881338ca5. 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/QZFHU1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f08e22331c7500bf17d5e0d6b0c3ccd0bd891d7481185cdacc3cc89362ab5c. 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/QZFHU1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe999fb19c04d51d001600ba88595c54a82399ff412be3d46986b6f55a5f8e7de. 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/QZFHU1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5390d4bbaa9e156044fb2aba440cfa5d139cddcd8d2034d0dafb627872dd3e23. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZFHU1900017.
La Voix Du Coeur "The Voice of the Heart" (Arr. C Ferreira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a819c7cd395a7be59d404e3e088f354db0d9a1c3efd9e2cf78c61f7ad482cc. 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/QZFHU1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb2a13820135b790389664e59a7294a636f23bfffd9fffc28fa24de2f927ce2. 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/QZFHU1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e801dfb50157d17b4a325808f0dd3b8191ed5f588bd256707723ee73243361. 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/QZFHU1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced60f504f42b4c1a8391ac9711732f559eb9af9cd8de8c7fc5f8e083d1d706b. 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/QZFHU1900006.
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 0xf3f19b30d1c5a4e13bafaf43b99d18f7413dbf6f88f4c55433c3ec2c9b9d056a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZFHU1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca254d0070c238580a78a498711af1ed75fb1688fb4917cf3b31294618da6220. 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/QZFHU1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d336f04e067b5bf552e6f5610fecf0c450ef352e3e9cefedf41b1a14835d96c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZFHU1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e309e5192f80e824b5256ebe7d6ddcf0d76e28e1b000bee153d2fc0778be6db. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZFHU1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bb35de3f00213ca743c009a6c70a5777d003d685694f01fdec316086582ce1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFHU1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5565adfdeb42302cdf816fd771be720229901b3531147a4d575933ebde1693ec. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIZ2450280.