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 0x49e1c5cdce345c0fc55772cf7c34e05431f2429b7cfde5e6668e5f37497e86cf. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5915a43-49d2-43fe-91e1-c197bbefbd67.json and https://artists.proofprofile.net/proofs/artist/a5915a43-49d2-43fe-91e1-c197bbefbd67.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
À L'AVEUGLE (Original Motion Picture Soundtrack)
La vertu des impondérables (Bande originale du film de Claude Lelouch)
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 0x20a74fb88d8e3cd8e8d13a8a7ac67cb20fdc14bc980454cb4cfc5733c71264fb. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/FR26F1702099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db4809333cc92593dfb99e0e41a9df7f6dfe8741c75660d4880b0324cc93ef9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR26F1702112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11caa9fe59a127b9016a45c432cfede0f7fbfc35eed4c97dbf569a515091e2e0. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FR26F1940100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9f3475b430c392f8e8350bbfa8fdf8af7574a86ea08233ed47dded1fe22e3b. 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/FR26F1940101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870495a57d7c8c1f491011305e09d8494f68677c9918a410ee3f0b7a15897ad5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR26F1940102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8f8967dd7772094120536f9ce5a4b567ce5023e1c5f1fa5bfa5070f28c3572. 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/FR26F1940103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c638cc2a7e615ca9ff2a35e764daf79aa4306936af97a597d83ee1d28a49576. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR26F1940104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2c2070c0aea3a8de38ca33d5122e9795e8fec10e5a01012cbb49fd39a7edad. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR26F1940105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92900f305163c6b160fa5997696252a5a4054b42e4644beaf21aca24f8aa41e1. 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/FR26F1940107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe310fdaa74a5a0e80a7a977d0a4cdd401a607f2d3b5a69386ba1ff2229af81e5. 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/FR26F1940108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4fd8e1b48e4bd3082786648326bc6cce159b524a25c453262783b9dbcba6b4. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FR26F1940109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c87d8abe0e03a283fcb8575a9554bfa0b457c9efe363af4c5e65fe84f761129. 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/FR26F1940112.
L'amour c'est mieux que la vie (Bande originale du film de Claude Lelouch)