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 0x367402c63a5b6224efe504cf4862f1ce18e669e10d73c2755aeee3c701fafbff. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33d29844-d76a-4fdf-8f55-4ea271bdbaaa.json and https://artists.proofprofile.net/proofs/artist/33d29844-d76a-4fdf-8f55-4ea271bdbaaa.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 0x0787c0b7afa6a7ea488b07aa8fe3e0efe05408435fde068279cc5326ad3cf0a0. 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/FRQ031211901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6631f52c662a011f07a4b08e759485e45c0e7cdcbe257545d4bf506c54650db1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRP621900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7940367e745e374aba47ab5f0ba39e98d0628c63aac290f7da845d7a41b39e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FRP622000720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b3bc3a3daf548d63a8a2a181ff50a74901cec47df3c612e8165452d2f2be18. 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/FRP621501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0543167abe76d2a61ebef8f256d7adfa5e1b175d503f391459ec3245150e91f3. 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/FRP621501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3c8bd72cf36f51a25d9e491aa52309eedc02027ac121ea055f00f8f6fb0f21. 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/FRZ041200634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad1fc6edfe79ab98e7d572637ff37dde3a623531a337b250d8d5355f7181ca2. 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/FRZ041200644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65669c4fd87d964ba2322ee54c3453f2f612c596f72e532438b6a5053756a77. 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/FRT091200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf726ce87595323f6b9cb7783f65713e646112f936d7803691c4b4d8969d30b1. 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/FRT091200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d54f67574225bc7c1bf71c5a1e061b115047f345f370c28f09ae3315b4af84b. 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/FRT091200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75e31daf505aac12630c8d543dc7f2c4a60e91874312a2dd0ec858c093ef6d2. 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/FRT091200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9bf11ee83e4b2f05fbed757d6c5b6c420c268c22ca9389b73b8c5562662954. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FRT091200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cd1d3d08aec073492c1c1c67a090f576376b9d416a3a95fc8c502f812f3752. 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/FRT091200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733ae4a8d1cdf0453bbaa7eda4f99659f59ed6f84d5860acdbe2ac48807bdea7. 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/FR97Q1127307.
Variations sur Artémis (Bande Originale du film "Artémis, Coeur d'Artichaut")