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 0x6ba671187c221ea7e67493f661e186ee1ba4b569a2bb1a91bf6a6cfae67243e3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77193d3b-fea5-47be-9571-09da38d3973f.json and https://artists.proofprofile.net/proofs/artist/77193d3b-fea5-47be-9571-09da38d3973f.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 0xdd7559a2e6fe96edf03ca2186434fe417e463528ae4846bf8c864de59257bee0. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/FR60Z1100810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1c1b32bc9acbbea9c23c411572db356145ee16dc5f7d754c45705004067d27. 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/FR60Z1100840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a9fba069053b5f6db7a9eebb35692be7a8f0b127b8d93cde5e0b6495d82a8c. 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/FR60Z1100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539335ba7fa7dfc0ede1656a1d1a44cc684955629e248f4aeea80d7d01850a04. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR60Z1100860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621430c96705a106f655c5d4ca3fb677b927beea0d311e1afdec34eda1ca5890. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR60Z1100880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde597b22da454d470dd9bbecb3eb3310e059df4aa6c8d48db0c5acf573ac6006. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FR60Z1100890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208776e8e3d0e6684de6e438499d9ab48e9806c5441b230090fcfff053dc087. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/FR60Z1100900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2a1a0567ed69718fdd2d3e51721567b9abbd6f29430c35e5dc25fc02245d50. 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/FR60Z1100910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69ddf3dceb206f8cce4c8bb77bdaf26a96e0f03a8be55743880f5f3a29552f8. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FR60Z1100920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed1e1f13138e32a8fa4e383a2fcf83e8506925c48a90456f14129c5912a715a. 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/FR60Z1100940.
Des salves sonores s'élèvent du vivarium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c60f7aba5af504e3940881b7d0255193fc2a15f29f19e4cd8de6db88c02918e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR60Z1100950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786b3ccf42b67d5824969ba774db1e4e3ec59842697d1c39b4e4c320839ea0bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR60Z1100960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bb99384f1756b7f92a2e8c0d39febceed17404097994e0f11e40a8d251f152. 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/FR60Z1100970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bed0b80503d3d03db30fe97183c6a1d9b8546101ee461f86d41c3e2a4a0b4ec. 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/FR60Z1100980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e977d4154015d5a812264be3bd0e9c8831023212d26bdb40d1d39d80745102a. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FR60Z1100990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa847260fd4b5f46c1c82bd652d2c882188ef4406e4c70da69035cf509ec123aa. 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/FR60Z1101000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943e05654ca2c00bb837281a1e9b5dae164239920c1cf81a0ba78c264d52dd1f. 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/FR60Z1101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ae6e288ace7c2ecbca6381814028221f70976a4b9965a1162f1358c1b0b773. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR60Z1101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dd6e1291ee7217c258c2ed8884cfddf89b0140dbf7cc6aa55c9f5eb70ca71f. 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/FR60Z1101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837e3721287ca639a6e6c095ef587e46c08546c4126593f741bb0ab719a8dd6b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR60Z1101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce95cc89e452d6195484aeb4d47ffdfdbf343235af0acb2959edff2be4ab3ad8. 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/FR60Z1101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8394013f1bf1e6cb08eedd601bcdbbec719f95b90862ebf433d7faa171801c29. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FR60Z1101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a4bf8dceae5f893f6e372935aab726163a7df9a1d711361cbe9c39fdf2c12. 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/FR60Z1101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce0555b9d2841d50caea737baffdfd5f392c7b307bf9d53b4f582d5f2d9f53d. 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/FR60Z1101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a94e0261c4e0a167c1386a1c5e3114158c91254ce336638e10095d5a1ab08b7. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FR60Z1101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735531ed1554927d3c8b384eabf691d2ff3326b1ea2a607f72bb817f08f1eeb5. 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/FR60Z1101100.