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 0x6dc561946d40bc1bb8be3713a9775c9acddf2bc302b4bf94873939e9c4003d98. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21a53564-158b-41e0-966b-0ad0bf8c88fa.json and https://artists.proofprofile.net/proofs/artist/21a53564-158b-41e0-966b-0ad0bf8c88fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tubes années 60, Vol. 1 (Le meilleur des yéyés)
Tanzmusik aus den 60er Jahren für Partys
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 0x7862e71f47b5662dd0aa07abdeddcd14cd4799a8b7e65e528e88616e79223d7d. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/CAM460435894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38ee7dc4e897d257d6146070670b2942c7825f82a37ea06ea2a426048ad5a25. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR0W61844161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924584f5c3be77628f8b78a94b73885431e21931358d6ec550b14a1a01328e39. 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/FR0W61844164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb53269cbad7feb0c3bd0585ae127757bb355b406a60c1f01f1ac90272295c7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR0W61844169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e0d32362f8485a972c804312cdaef0e0c763fff68d048d89c9d3ef09d6889c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR0W61809381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eabfb278aa52b8ed63fd3d8c608d5a6864664603ac3ff7cdaf56a52e8f4992a. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR0W61809386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af017ecf0b24f315850b4c2c2d6af90e1808a7300acfd0f2e0c3ccbda9739b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR0W61809387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34fd45819af0c1601e5fb26df0f167455ebefaeb7ea4b7ae8d1a96a217fe96b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR0W61809393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eac2a113e3aa4f8f1a91f340a0647b7be1477984f0652402976f53b40239f3d. 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/FR0W61809400.
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