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 0x5ad9e9c4a98cbbca7224bb9b006506b1434a0becbdb54740e140a9b54809f754. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b391c5f5-d548-4104-9093-fd14ea9de36b.json and https://artists.proofprofile.net/proofs/artist/b391c5f5-d548-4104-9093-fd14ea9de36b.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 0xe1bab84af0a6d98e24d83817ec2d47a212e57666045a280347e011f1a2a1ef5a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:36Z), 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/QZES72083328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d724dc62dabd4a12c389fcaeb497f83be52287a8fedc56dbc4afb5897932efd. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:06:35Z), 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/USHM21928812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2625c6205d2f55df2377b343b92b6441125fe530753c5832526e5b162f298d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM21928814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5ccb1a236161b9dd2d27c8723b47bee12497f721195f1e38281883bc79063d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM21928815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec157053121bedf0deeda6b950d38f4b8ab13f17f3f8f74b87155dca3721d3d5. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USHM21928816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4c23771de3cfd3558bef5bb0c722174748b8588233b130618113e1185e18e1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USHM21928817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105d983c8a8027bb7d99491cf57a2d05f7c4d3ff6d507795f2a8c2c3d803fdfb. 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/USHM21928819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174a7c36aca64aaa5248b68c7948192a64a7ec87f98aa5554874b48da769c2f7. 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/USHM21928820.