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 0x6a2e58218a6815106dc7eaeb8c4d3fd8695abf71ab3eae56e137db6d2e07da7f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52a0478e-e220-4b56-b761-2b5e92fe28fd.json and https://artists.proofprofile.net/proofs/artist/52a0478e-e220-4b56-b761-2b5e92fe28fd.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 0x134ac6f40a5374694484dafa3861e4f0e11b25f6961921294399a968f9ce09c6. 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/FR6V80652004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea1c09edfeae1e4eb88e665f951288b3bc4c67bc37a7be55a34839d35b024bb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42588406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2e7c693aaefe9a8886af0358455f595e7dc67b5e04d42402f570610327228c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR2X42588408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf5c8707bb1377f83ca4c35461b03f525cdd4864e0452908600701e68bbef1. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/FR6V80654741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0c9976fee76dc142f83304e3f19b2d6044063cec21b199b873dd2fbce91d08. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR6V80654710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e25badbc06b0a450f992a8b5297dcaad7267b8281802b655c35dd80d1d25b. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/FR6V80654715.
La grande rencontre de Luc Léandry et Eric Brouta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfd03cf844972ae3e60300beb548bc346f75335cf3e182bae590beec057f5cc. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/FR10S1531490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55edf69736d73c2ee0396eaab5af35d63b1a37ce60c1845333361c05a174c751. 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/FR10S1531497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d5b0e6ae4e18d1971641660afe55e38a2d9286d1b172f7a914c273a6897fd5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX871524775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ba874f3c4455a4ea0be11e573985e89da9662edf61f3d9cecafde5c6e748e6. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/FR10S1605034.
Carnaval show : il y a du jambon pour tout le monde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902a81dc9c09594f122fb3977d4918913d527c86358697f5c58cdc19c2b34006. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR10S1707923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe551562c7c5d223926215963f95518587ac15cca522cf4bb22690b2f7a5cd9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX762273317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c09d68489a828f56722431c95e5473bc5696dbfde653bcdae8a70d6931a02a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA0T2425644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6376ec4dd204d3740af621f7678b4c2a7fd0afa5f14e12a7da6c2ea4fb0c3a14. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX282540489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc3a64c463231940c81589f40e21a5389b79b9ef9b654a65c7c647288dc92d2. 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/FRS709360666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329d9cecd18b8124be612aaf075dd05ef9424211278617da12f718ade0ae0ce2. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/GBGYQ9500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa180159ad9a91cc2a0afa0e27fd1bbdd2f84a786377765b8285d52781b465999. 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/USDY42345501.