{"copyright_id":"0xe2b1b5cf94d1eab0634aee193fb3d1668db0dcccc6d7e3adf35ae37934fef39e","name":"Réjean & Chantal Massé","registered_at":"2026-06-16T21:09:57Z","symbol":"NIM1176506","token_address":"0xc3de94148fba8ed7c19d8da37f75371f24c4b6d7","type":"artist","uuid":"5ad0f034-9b1c-4aea-a28a-a06027ed4fdc"}
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 0xe2b1b5cf94d1eab0634aee193fb3d1668db0dcccc6d7e3adf35ae37934fef39e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ad0f034-9b1c-4aea-a28a-a06027ed4fdc.json and https://artists.proofprofile.net/proofs/artist/5ad0f034-9b1c-4aea-a28a-a06027ed4fdc.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 0x4a4b102c9e91212794cc01168cda0faa710646eaca890320d49a4ae22f918d30. 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/CAGVN1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f71d7755e5809fbb99eba6b98a633aef37f77f492ca5a6d14e85f67f2451b2. 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/CAGVN1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a2a0093d3c0f1b1163677b637712ae4c2c2a0ed8f7a68a441e37e9a4896643. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAGVN1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a29fdb30a36cdfcc42a715acf4b731dc846748af351214c2134c7910ab7c02. 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/CAGVN1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248ef12f536cf9cb921f14a68255a5952d0efcf3bbafb2c4a135bddcc221bf1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAGVN1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476c0c6e5240cd102670a62bad02e51e508823dd813a5b4d1db9e53a45fdb92f. 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/CAGVN1800001.
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 0x2a701c9bfc28e8bbf53688cce2ed36cee61ae1450a91f9d383eb8c4f57f1dc80. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CAGVN1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547352dede87bca093aa6f0cfede85fffa7f29377e52d960c67025baa41af6b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAGVN1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4731b0f3c8a4eaf774ce06efd873b01cdf3562fa116df2eeaa07949a9254a06. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CAGVN1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59bb00ffdbc7fe1fbc906dac77128855e5266694903f9d4fdee753d06586ae2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CAGVN1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7753ba765a04e92b9488970326b99a76e01f09fa71b477475c5196e88ed72918. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CAGVN1800013.