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 0x0f116963507e4c661ebc0c8bd82b1fd6a9c88bc1e067ee7ab38b08244cd031e8. 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/0f382017-1c17-4c23-8061-7815222dc34b.json and https://artists.proofprofile.net/proofs/artist/0f382017-1c17-4c23-8061-7815222dc34b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les Padrés à la Chapelle des Sœurs du Bon-Secours de Paris
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 0x3d70b564507fdd29515fe74045d2d1061a55fb22851df2ca89daa89ce8b991b1. 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/FR7FH2202390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1931cd7d154138e129104cea67781588f0932634560c834b5dcdd8b8dccf204. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR7FH2202400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfcdd4a58fe235032e8b0cd1bf33296f5bc5fcb8d514953142b4dd2b84616f9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/FR7FH2202410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26806f9488648441636bb294a422e8e4d0e6656ecf48cfa065ee4a91d455877e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR7FH2202420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd206bbdb0983ce7bf758bec07fee0433e789fe15c78cdfdad41074c6bbe5c95f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:18Z), 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/FR7FH2202440.
Les Padrés avec le chœur du Prytanée National Militaire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b28991fb62a54378c913c1f33f035be7049bc932ca152b2f63b3cf8ee3f3e3c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:55Z), 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/FR7FH2201470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e1e212cbad2adfd7dfe19dacf98d7427d771464208ff7e5dca669a8adb2ec3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR7FH2201500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceeb7c1b8a668dcb0b40f2399aa09d82e86401432a7eca9802508695964c459. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:49:27Z), 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/FR7FH2201510.