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 0xd698f708d4b00303d363ceec9a1313297733baf872601d24aeaad8b690c16f84. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a328c14-56c3-4c63-a624-bebd54772e9f.json and https://artists.proofprofile.net/proofs/artist/3a328c14-56c3-4c63-a624-bebd54772e9f.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 0x4293a8c354ef4034b9f1c5ecfe4866450a89e948cbd4eb1449c23b4adb811885. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:30:29Z), 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/NGA1K1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bedcf4ade6523e17841890f9e27301b5cf1135b2705f0ec1b2fe56fc92ead3. 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/GBRKQ2511555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ef06fa55c0eb14d600bee56ebce5d99de2cd9f4856ce241d15256fe2008e09. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBRKQ2594234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d978407dd5ccf81122c500488f767c13e8bbe58d0336ebd3eb2ff868ba0e2d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:56:56Z), 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/GBWUL2516228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4c34cf3505c43752dc083e3437c01fc0d441db7cef598dbe0e9e0febdd8b9a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBWUL2540585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e14e92d9deed11f619b22410248c1c11c886d10e9f0b987a0d8de02bf58774. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBWUL2557282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7693dd18834ab0ead8c894396aceeffa3db318a73877143568e9113dd2e0208. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NGA1K1800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa81d2d338220d1077c1d361d5c1bbc6207e6021809aa19b96e691666b435561. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NGA1K1800041.