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 0xfe7856763ffc135baf38cb87bd581b21b76d6b782f606c65589cc7dad2c42ee8. 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/92fbc277-1844-4003-984f-8f985f339eed.json and https://artists.proofprofile.net/proofs/artist/92fbc277-1844-4003-984f-8f985f339eed.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 0xc0fe8145ff85ac26057303b2a0880d4bbdfbe2718b1d6a53b9cc9fa0b3040048. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES6010600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9730939aff58db9126495084c0c6e2500a6096ed337def23a23d53fd4ba493. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:42Z), 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/ES6010600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8209f238cb8c9b670ba969a7fee62cfa7972970b3a5740639a098e80fd0dd94. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES6010600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121982b7e5a215ab65e039fb84b6a8d5861fc17feef373d0a096eb374867151f. 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/ES6010600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346562a24f8d0188d73f80730239a16118ce1999b3ac88b6ec4c7106ba4a4746. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:42:10Z), 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/ES6010600972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c1d1cbb7e0ee18ac01d6a077861954bc8703ac92a434573432182820ae398e. 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/ES6010600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddcf3e4a71176b6c8d2a9fc287bdacfd49ac56e5fb26c49ae9d37b1c29ab2b4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES64E2508709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf605eba6cdbff6db3135907fb0e16176debc239cbddf72f52cba3b95267cb101. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES88E2200006.