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 0xa569555454182a171e0bcaf76a1c1f94362e3a50f33802aaf701f0f29f40e3b7. 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/7e2c3310-81be-41cc-a06a-bc1c4b1057f1.json and https://artists.proofprofile.net/proofs/artist/7e2c3310-81be-41cc-a06a-bc1c4b1057f1.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 0xc23bad9be0fe037a5cf6b60bc9d4eb2a8a5a40c7b34b8c8f9169ccdb2e482d82. 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/CAZ700802795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f1756898a39fbdc02d62b124e3bd845c3070bff6e44751afa81dba7df403a7. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/CAZ700802796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e41479b19aa2159a7315470fa40c3460f5b96d29339559df35fca671c221a3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CAZ700802797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4050a1ad8d8b98feb5199fa602b8df10116be6606511daf1e9e68be5260498ed. 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/CAZ700802798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822e943badd3b17e523da287a4d36948f2d77270d120fc5220ccc10dd4a0318c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAZ700802799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f85a56b89aadd8f9d8661ad9c210d174ffcf0b181db03b43f2ea4ac0a9c2ac7. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CAZ700802801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2edd88af3bd542beb7d3ad83a6c8664c18c1c21b9c413ecdb5370f972e62fd. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CAZ700802805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb84843f88d9d21488003b040823a05232c3d9494dc6e69310028f76f3806ac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAZ700808569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db4deabdb98daae862245cfc7a49acceb7250961773eaa4a23152022fe127b2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAZ700808578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d111d3b38514eae4a6ffe437116a93a10bab49bb60caff05452ab107f0096a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CA4BL1100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1249d2a78942711e42e96f10d77c514794f1d62cc22ebbd7937e43b6f539672. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/CA4BL1100312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12004933147a22146ed7383db09834289a9f0ba20155a0fa32b357480a73b39. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/CA4BL1600001.
De l'autre côté de la lune (Berceuses acadiennes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27fc2b12008348687f794e32479ab762d05c80d142dc452197e8cf781072658. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA8ZP1200008.