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 0x48888f0661fa4a7ee169ddb2aa803f591635f91d2799d4e6cb7fba26f6e6e8bb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9c46ecc-323a-498d-acbd-5aa7c7eeb02c.json and https://artists.proofprofile.net/proofs/artist/f9c46ecc-323a-498d-acbd-5aa7c7eeb02c.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 0xbf7066b87395480fb46804d97dea741f0c65a46a4eb5b06ba1900812858876e9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DEU331300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b7a297246bc6e5daa3094a7d1158f9c9d95fb22d87a746fdc8e07a1a3befc9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEU331300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1f767abcab7e34eab6df86ebbcfa7cb8ad71cfc59064b3547e9bf5600a8932. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEU331300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d520af5b7f92a5b97757fc4b911100b3e886148b8c9d3fbcfc6aa8a5fff3f4d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEU331300459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c09ca3775a715376c9aa740e89a83a77fe139c0761a649b25b1eede40082088. 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/DEU331300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf67bc9058730f0d11fe7b547b094ebb8fee7c632b9dd55ab0af6a8c577e83e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEU331300461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb910d5f2ee0425f0b90bc56b227a082b04a30c6d482bb8c0b53d07a7f028ca51. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:22:58Z), 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/DEU331300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84d30d405f585d208b2ee270bda649a1fe234ba8e2810864dedcffb394cf63d. 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/DEU331300464.