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 0x5ea32db34211776d6efdf205a6b4c7f0f5caeb171992b0fb35d5b078ea1f6eb1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/332370a3-88ff-4090-8788-0bcbe0093eff.json and https://artists.proofprofile.net/proofs/artist/332370a3-88ff-4090-8788-0bcbe0093eff.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 0x22a45eac3fff22f47111071b2adce43a9a8d4cc87d8bab2f22ee820cfc75281d. 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/PLT612140002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410824177ffd354e394a261a5859a80576379203742b245fa3375307979a95df. 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/PLT612140001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cce49b3235aae56bb87a1022d93c2d90438bb7365daa1a28c90b30d6d46aa3c. 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/PLT612140003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f98c8b02a054ae1540a928433d72d1c20afb77e8f33054a7827aa5687aac1b. 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/PLT612140004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccfba018b384d8927b674c48fc3a3f21d910e3d9bf64d3c332520cfa4d5ffbb. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/PLT612140005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305a19a0832d1fafcbf7bfed09a57d7407d2c43609c0e108b43dce0e374d2a02. 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/PLT612140006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45b88bc22cd79fb2d9cac799e7ff5040bfdcc5e6169b06d1251239e2e624ec. 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/PLT612140007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da0bba82a5c293326214323094b00a6fd87796dcb662429a2b3056f61318a8d. 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/PLT612140008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa502e16f4929dfdaa9fb665f721bed94e1aa2dffe9fde29a48f9d11b2ab8720a. 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/PLT612140009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd422249684d807e8b7450663e96620e466d9c16b86ac6ce5b67fdcbbc30eab4. 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/PLT612140010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c0cfc39a5c7c0ea868ded786ec667bfffc71ee2060281b5a61bd00c699ac19. 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/PLT612140011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde4b960122b9d77dc2082159c3a168a6cb9c98fc61c971b06102d1379cce1b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLT612040016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e7f45cf82ff845aa19a498b22b5b6cf76726c178e8ae55feb8e83cea366638. 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/PLF241906699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e7f45cf82ff845aa19a498b22b5b6cf76726c178e8ae55feb8e83cea366638. 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/PLF241906699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14dd9dde69df3d7553f07321739fe315bf180c8152930d8f60f3799faa8875. 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/PLT612441004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426f1a25641ccada1f9391323ec24565aa889ce5899d3a8955ccca339f94abc6. 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/PLF242107668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56c40d9fd78c4fc37e4712e92c2fa25124a83295a861cfb55fe17f74d480355. 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/PL37A1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0c03f81773c62975ae0c03e56dfa8d13d44fc98719964bf666c89b63bfae55. 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/PL37A1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56c40d9fd78c4fc37e4712e92c2fa25124a83295a861cfb55fe17f74d480355. 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/PL37A1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbea12c653b140d81de83bbbd0824d3f3cdd8aa60b9fa330daebdcdc47e306b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PL37A1900005.
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