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 0x180681a5d60200bd42626b5efd2738087a2032692b6d6f454147773df3d7b4d8. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fd8d55b-8427-427d-b784-7f003d265eac.json and https://artists.proofprofile.net/proofs/artist/0fd8d55b-8427-427d-b784-7f003d265eac.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 0xa8d1135f72259b1be9c35e796536cd6fb775a162b6b94fe5262ed229ad8910be. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:34Z), 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/TCJPJ1950028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bdd96d09db1512a6f3280aaf25ed1175a6b270e545a987d1fae3d9bf39a10e. 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/TCJPJ1950033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fc36d587e445eae9200f52a4703b6d28406439bf8de6928e5b9daacb1130a4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:45Z), 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/JPV752104848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcf4b13c1bd42c81eb1b3e5afa59f7d2f9a10f5f590591333ea36a7e7a283f0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCJPE2574403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853cb5caf3febc12d8ddf5b6a761cabc979f99c1d7da6bcf11425da3383bfd82. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCJPG2567933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2f03f5871b99deaea15b27ad6a954edfe3ac987645d7e7354bd9c88ffcd291. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZMHK2337588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca92bd5569081616078a7ed4aab947202eca8ab718b05048259db17b1d6785df. 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/TCJPG2593862.