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 0x7cbe5fd76bab59f30b611109ae20f3b903d98cbacc9f7b44b49ea96b40ef4ffc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ac2b7ee-0dd7-4739-b544-7d1c9dc1e180.json and https://artists.proofprofile.net/proofs/artist/8ac2b7ee-0dd7-4739-b544-7d1c9dc1e180.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53cfd377f4305c01f98d7bbd0dd469bf2026521a9885b0f1185b0e022afd9ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR6V87800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944d4b53851516dd6f68294b4cda17bb1b052281f3d8b901098e4725c8a41e9b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:06:55Z), 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/FR6V87800195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d8c72a38511283d3e938d84b958b58b91872cb02f2a840dc7c44a9e7e054e1. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/FR6V87800197.
Pierre Chêne chante et raconte pour les petits
Imaginations pour l'expression corporelle des petits, vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff081beb1c8187e629b415e7487443c69f16fe5b0a7d175c037d9c3a741477a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FRX201611566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0107b862aaee871100040ac83d33b15fe9af114b47183a79f6a4686f1be234c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:02:15Z), 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/FRX201611571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553cf5985a0958e813d5243c31daad618e7f8eb168f5452b8573fe7bdcc6bf4d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX201611572.
Vers une danse naturelle (Expression corporelle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2add4a70e58e3593dac8b52a977023e836f70be7d6ee735f76b9523a68b7c158. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:11Z), 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/FR6V89803001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb26bbd7d617142a193c574127c5fbb2bc9bccf3404242c96685c1b9e87edec5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRZQU7800100.