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 0x3653b93a776e6100cc06595d3da1b95f09be8b6053eedf8096b22c1c38d88f41. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6c5997e-d387-4366-9f41-c91194621582.json and https://artists.proofprofile.net/proofs/artist/f6c5997e-d387-4366-9f41-c91194621582.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 0x61212fa42a75652ae9c0829f49516d55bfa6469ef95cac2cc8ed77246ccd68b4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZPLR2055206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fa744559c43046ee107735adda662df327d770c4e4c2af913a97cf05ef0b97. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:54:31Z), 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/QZPLR2055208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d38c6d61131cdc4a0ad26e086f026f6a3d6cd4fe80e709072ff42c21d08431. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/QZPLR2055210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8eca88d27f3af07330d28d025a97f6cff68015a679731eb0791da16f5c9de1. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZPLR2055211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f6931f56e50f68a9b46d88c9eb056c933d59a890e94778fd7455fd24ce75cc. 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/QZPLR2055213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c80fb438cb74754a4a292e88c0255104e5e5c527f02994956f6a52c85cfd8a2. 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/QZFZ22455263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd9f084dfcca94ad591992e13fb73e5573a68f7326c13b3910bb6f7c804dad6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:57:57Z), 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/QZFZ22455265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00a2d0b1e54ed54031dd2ea6dce86937357930b76331209f3efa21527c1f39. 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/QZFZ22455266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cb4a9f53ebfee0594b77085960aca5c48535a1a0db96c800624a543bc19302. 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/QZTBD2399289.