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 0xb9e80b424e3d036032a1ebbf52636f18a5da2096987439d8c037687a50a1d06e. 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/3d8d646b-3a3e-4db7-8db6-ecd68d26f8ef.json and https://artists.proofprofile.net/proofs/artist/3d8d646b-3a3e-4db7-8db6-ecd68d26f8ef.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 0xf5cf125406964df19ae4fafecd9bab360ff7463e4483faf991c7217035db017d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR9Z62100370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bea02d8fc36bf19ae5ef6f3f222033cd9dee42b4c3ef873d10bcf6d91b3a2f. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/DEQ022390366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b28baa2950eda8afb6a4aa113ceab319c9468efe06fde5750e00dada42299fe. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/DEQ022390367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce7722a619d01aa76c8b4e44fb6d6932020337e244a6d7b7edbd2ee01c24ba1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEQ022390368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20fc1c5a222dc2e14b5726595cbc7ce62f458d316f04720a4bf6ee3758a75b4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:15:38Z), 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/DEQ022390369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344b8e24773739bddf16c1f791df2d013346853b6ea17feceb8ad7ea64a6bcee. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEQ022391071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92415f48e84bf775c8dfacc71ab81194a56a0fd499b344b669488c4d339c4a56. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9Z62300810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0056cd6e6ba4e5df03b57b7f31b614363156be4dbc5e55ccee98b0393946781. 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/QZNWV2480979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce74ee793a1f6d20697f91e0895a6a1a2cc3083d97507f7ed85750ba8adf2f05. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:22:26Z), 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/US3DF2566163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575dbc1710def928e81aa968aaf96ad72369fc4f61021f77be5e245001f2f451. 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/DEQ022150474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7cb5f5e3ce9e27ebd62d2912c3a4dd74b97d7344b478609bb6ed2ba636e690. 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/DEQ022150481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a48adb6a1057e67306b837cf82257bc7a79b034f3482ad16bd44cc26340f0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ022150487.