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 0x621900a1749d4b94e93bf4a0339da417789264de2144595bddfac3a3dc73de25. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c2ddf0b-8eff-46bc-9f5f-87f968c2b7c3.json and https://artists.proofprofile.net/proofs/artist/9c2ddf0b-8eff-46bc-9f5f-87f968c2b7c3.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 0xdee14a275f14e2c3db83e0c7f31c71ba7f485017c54406e1cd2d8b84a44b8032. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6XS2300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7b0deace8abb4463c83affbd7d628e342e01c59a457c757d852162dce0f30f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM6XS2300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191bb110b0a8d642d9e90069d9d99027cd7b3d1e8b6520295b3f37070ed82267. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWS2336025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757213660e0a12331fb557dcbba0a5c92645927beab90fc89c4a962978d9850b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6XS2411816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec62016782cd0b6f85c7ad0bf7e6224061994b1b005a127f9c44ff216e1a10. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QM6XS2412285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd431b699352402d24a2fa67f0825dc544ec00621d22c046097c95b0e11b6298c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6XS2412286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a66a639a50c7c3436b6cbe2c764230e044443e848873d411524496bed0da2. 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/QM6XS2510206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b83f729d88440947fad73a4980d351702e39500d7c99f5249337601e642bc7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:29Z), 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/QM6XS2510960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaa3c8b13ebd4c5b78fd795e0ac6b85248554152197ec36645d709f34282854. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM6XS2511320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa8f5a23932017a85c8bb185d8cce3615e8f17a5f3ba6d6fbe232d009873413. 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/QM6XS2511511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e578a1cc65e38493ec75935b9d3fe1b519f17c45d3a67483e056da37ca51729. 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/QM6XS2511666.