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 0x4ee0746e3d0e198b81f1b89d4f91d1cb6de6c9dbaaf8f1a8ddcdcfdeb495f055. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b0a3f9f-e39a-4b8d-8088-d29d60fe8949.json and https://artists.proofprofile.net/proofs/artist/5b0a3f9f-e39a-4b8d-8088-d29d60fe8949.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 0x9430e9f4bba200bef01564b80f638b51eb615f0a85418063b59413253a080045. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGJ2577868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5260f5029313bf2d35c3c414e81d219ed02f7ae9ce0b0357b94a48a0b6f7dfa3. 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/USCGJ2577870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2303ba1cb550b61280b6f2880dead3eff80c703187799dbbea0b115253fff. 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/USCGJ2577871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66486f6d01c35a60e6374ed3dd39ebab0e41446d1ce6463724eb516dfc1b8a1a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:54Z), 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/USCGJ2577872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a11934988f13fa7dd9b68d08fe91aabab32532361fe760f9fd851eeb5357a7e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ2577875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8793404c958c742c68b4c2c5cfb57e2af8ad04ae28ec5ed0a9a4dfab0a0d041a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ2577877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d613403d906493b88a75b9ec5216dc587d77d56ce7204a965a9b6c96ad8fe0. 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/USCGJ2577878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3213eed00c4a680f11a4588dd0aff4f45c53c1f200fe4c939160eaff02717bca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ2577879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfe5a31504f01a6cca2dfe2145e7a79bea3a2668d2f5bc98523ca8868ef4e19. 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/USCGJ2577880.