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 0xce95a06ba4aebcf93a5d02864d87ae16e8bf3dafdc6efbf19c77e1851d6e1fae. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a88cd402-d945-4114-b1da-9db09f19b72e.json and https://artists.proofprofile.net/proofs/artist/a88cd402-d945-4114-b1da-9db09f19b72e.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 0x6944f10ec820b4b06f04d120b68f817a9aee740405601c040898873eb480f71e. 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/ESA012491254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6ed6cb224cd23feb13da7c8dafc6d8d85701cb055c4a1250c7ee0db5ebdfee. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA012491267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b5e40e8f226424ee7442d005739b4c5c48e0349b4a6dfae6f1f23a1500b4f0. 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/QZXLZ2410248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71a0da2e24ccdf9b5e324ba9c68978607f09043c4db11d74a97e945cb491df7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:41Z), 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/ESA012541191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc08dd8a984e30cc38dcef88d6fb603f8fa0caed26bec8eb81190ec7856f79c5. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:18Z), 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/ESA012537345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cc84df7db54d86839294fd8fac532f9c909634fc771aaab44f46147b19bbce. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ESA012537346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc907a2d428c7d8537b2ad3dc74767b12a5adc5cc755a99cfed15fb35785ca7aa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ESA012595334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ded5c1e5c3db4158bb7cafa704f9f1013a311cfee6bd1c31185332ba4eb82. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA122517230.