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 0xadfd07d1d789540f9a875a85c95862343f8d0844d619708f0dee083583b36fae. 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/552d1ea1-d671-48ca-85ef-dc6bc575a838.json and https://artists.proofprofile.net/proofs/artist/552d1ea1-d671-48ca-85ef-dc6bc575a838.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 0xe58d38393f0fa8e42f8d75ef7e2dda151d3f7b9c6fa0441d15e546d77d596f91. 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/FR2X41967501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb200a4ee949332e427d125367e56b07eb15652c0330e97d4d1c0a6fd0ea11654. 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/FRX282071779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3b6055909a75c49ac7a983047edb14a6f2205d3460addef4fec4fde0b0c13d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:45Z), 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/QZN882142952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dc20f12890f574c2d8ed99e79ed5381ac0b06f9ddaaa6f8acf7c5f81d1c6ca. 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/DGA0H2417349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bfa4cffb0b8e643f80e8d1b6158633eb527417dfc44cb749eea06a45203773. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DGA0L2490922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32639645169e4d137ddf6c43ec6b1a124321589321b1d50674d04f81c1b9c391. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:26Z), 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/DGA0P2405073.