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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6da717dc2917fea3772af0d80e0f3267ae37f51d3bc58b5a67321f473977df. 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/dbd176e2-25c8-467d-b60c-1e857ac28f37.json and https://artists.proofprofile.net/proofs/artist/dbd176e2-25c8-467d-b60c-1e857ac28f37.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe613c9ee4e4b21c9bdf93e2f007fd30165135371dbf0bdd17a9414166a4d9706. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZFYZ2431660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a46f5209d13e8308266870a5678da7d3a8c81f0010dea92b38d6906052fab7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UKZGC2400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe706a2bb463215d7efc205c2ed24889800b6f5977d76ccc939e24c830b4a95. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UKZGC2401441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fca50832a7f7196fe4ebaf12f11e37c5ba6bb7d81cbdc3108cae41ca1f0c36f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/UKZGC2401661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4802293b0e5625e772ace34a64a73d161df2cd29ac299746406d9549c17c4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GB8KE2409922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e69289adfb5be81106afc6e4afd81edd0d386b8830dae1325ea44355eb6adf. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/UKZGC2404000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e49cefe147bc9dccc845b01e584615e321ca138ef77d6d51fb81604c07edd5c. 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/UKZGC2406389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a46f5209d13e8308266870a5678da7d3a8c81f0010dea92b38d6906052fab7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKZGC2400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e49cefe147bc9dccc845b01e584615e321ca138ef77d6d51fb81604c07edd5c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/UKZGC2406389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e69289adfb5be81106afc6e4afd81edd0d386b8830dae1325ea44355eb6adf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKZGC2404000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537e688df128d46da50c58a174b05c8a786b8378d8303f482d550ec66e5b1168. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/UKZGC2410671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fca50832a7f7196fe4ebaf12f11e37c5ba6bb7d81cbdc3108cae41ca1f0c36f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKZGC2401661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db8e5dac6632f2cab790dba0d678caa50b75a3b0950143c2fa0f987f614724f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKZGC2408209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b46bf32335ec73d43d5d6df07d71cec3cb529634ca78d6b6d8928d43ed07da. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/UKZGC2501311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b46bf32335ec73d43d5d6df07d71cec3cb529634ca78d6b6d8928d43ed07da. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/UKZGC2501311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c421f6a8163ef6d0e6b1ad9aaeef1ddb8142c9b52f3996aedd0fe883de0495. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKZGC2504610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c7f8fe42d9f1d1942bef8400d4752b05b027dcbafdc34540303b798d43da20. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/UKZGC2504827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b46bf32335ec73d43d5d6df07d71cec3cb529634ca78d6b6d8928d43ed07da. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKZGC2501311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c421f6a8163ef6d0e6b1ad9aaeef1ddb8142c9b52f3996aedd0fe883de0495. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/UKZGC2504610.