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 0x3fd9deed686b250131df2b41158c28fc95e4b0658d6e2c09e7eb78155b018950. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe091f67-aa9e-4674-aa9f-e39447561d75.json and https://artists.proofprofile.net/proofs/artist/fe091f67-aa9e-4674-aa9f-e39447561d75.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 0x0ba98178bcf1814f1bcf212172ed1c1be0e9d74b8cffe9a2099003e6d8db921d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:38Z), 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/GBBHR1501927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6fc5e7a777bf49f56835145936c0aeb06e0a9343cf083b08356d00162db2cb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:58:00Z), 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/GBBHR1501938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404fc3116529b32a28d334c50e77f4a2cb715829b2f3458c1d6beffbf3a19499. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBBHR1502836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e26ad0ec79b6949224f656e676334813ccce7f56d20efadf3b66cf983093a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:00:30Z), 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/GBBHR1502837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316db1bdc0a9b15a526e71692519693c93dff0c282145ef1a967bbd064cd3038. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:25:26Z), 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/GBBHR1502838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efdf62982e05776568694ab5119831b07f2f1907836f1a34a8374aaa1bf6e9e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBBHR1502844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577e5aa5c131d438049748fc138b444326fdfe562cdfb5ab216781aa86cefbc5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:53:03Z), 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/GBBHR2004346.