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 0xbc04ae252085ce204b2c4b2d2440bc6cdb1ba3040537c2beff85e501052a5ad8. 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/55ab4f4c-4af5-4f6c-8ff9-2a63176b1ac6.json and https://artists.proofprofile.net/proofs/artist/55ab4f4c-4af5-4f6c-8ff9-2a63176b1ac6.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 0xee7e5b035a576273da7a63f536f6dd93d611719971143e40dc10b7817a625a7b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:24:16Z), 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/TCAHI2301184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854e0948cd71ceee848117ff1c7efc589a42c84ac28435e4aaab61f7e08c7c96. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAHI2301204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf255045ff23fd58d666619c5d1a17be49270299c426a6ee1337f34da470d6db. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:42:20Z), 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/TCAHI2301208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758a0eaf6e22a54d54e75ffdd64f642d3e9173846a17ec8920e2e84bcc63c58b. 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/TCAHI2301214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1a49621ed00c46a38e4940e14853b66f3b13e7bf5da0a40b1522d3606305cf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHI2301222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6cabea559db139892f08ad422a3a2971206e3e5790f3b818f00e408f2f8d7b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHI2301231.