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 0xf2c333278714c85748f94ac0688e8b1041b40dc48ffa036b1ce956a023e65a06. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7fa0c3f-5e10-44fe-8ecd-a7316f21923b.json and https://artists.proofprofile.net/proofs/artist/e7fa0c3f-5e10-44fe-8ecd-a7316f21923b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les grandes personnes (Bande originale du film)
Le théorème de Marguerite (Original Motion Picture Soundtrack)
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 0xb2dbf4271570aa02b1407299a4341a5ea51691c74628bd78b86799f3368ec02c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR1A92304581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10beea32715422970e980f735a980377328ec2daa10d90f328de418ef06e68bd. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR1A92304582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e52fa070da399a37ff0f8c1e4b44329ec12306ecd8fbdd9f3fa69bc57453e6. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/FR1A92304583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e54f4ac660bb9a4241b5a3ddd6dd88bb9d063e50a574c550c61422d3b75583. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR1A92304585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddec6eecf2a20c7c91798b06d366a57f1f8fa4b5756bb78149658091fac2253. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:09:58Z), 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/FR1A92304587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4558e6def54f07f7b3c45b45af88424cb300b68d864b0ac524b40587ab6e5082. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:06:30Z), 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/FR1A92304825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbdf2c28efc87cf49d12dab897a1dbd15eb66dbc2bc0af6b8b14c17276010c4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR1A92304590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e968861367d217331d57e401e65b9f3857713c8df0fd8ea3ea897fa87489e8a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR1A92304591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f5e61bae8ccfeee447d18ed617940620ac455ee2faeb31f7aee69960371fba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR1A92304592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a542d2e5033ebc28db25744899bbf0976989a29b1ef021241567c4cf440c6b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:53Z), 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/FR1A92304593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdec5aff4147c79368a085432c3ba47ad5d368b0a975e15aead2e33bdb60393. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR1A92304594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90d06e4f36b652a98238f6bb31d153fd066d5e36fe9be5c1b2d5c793d97fd56. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:32Z), 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/FR1A92304595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fa9932b9d8cd5840aa379e480e542cfc311b2f5ac5582b224a6f0f1f75a1de. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:15:47Z), 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/FR1A92304596.