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 0xbaf6e108e1fa091b99216058f8b0a2eda81c5ca0c1175781028cf82f89489643. 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/4ad4f45d-8bc6-4bcd-a582-3cd6e7f87a97.json and https://artists.proofprofile.net/proofs/artist/4ad4f45d-8bc6-4bcd-a582-3cd6e7f87a97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saint-Saëns: Carnival of the Animals: Aquarium
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 0x97c838c530fa1bf215ca5866e9c893550221bb7b39d666c03ba70cdef9a2afc2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBBC2000208.
Carnival of the Animals: Introduction and Royal March of the Lion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0b7cae546f0213d7bc58ad7ad49a1cc241aa0e02499b55969b534f9c15406e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBBBC2000202.
Carnival of the Animals: Hens and Roosters
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe74efa56ae395c106dddfcfc67c8d670b1bf92abec28242cc7c4eaa9ef1497. 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/GBBBC2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0073b81de31ef5a8e2aac0066e2b4d77f911ae22b8c164b07f65442e4c77a3ac. 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/GBBBC2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c838c530fa1bf215ca5866e9c893550221bb7b39d666c03ba70cdef9a2afc2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBBBC2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f796561cb175ff19fa6fac298c7a84c3d03b955c9925ed5bf29a5731a7f167f. 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/GBBBC2000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ffb9ad111c1a0d62cc6cfee6c8dbf0b199eaa3622117ebe2ea35a31d80e320. 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/GBF071900760.