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 0xcfdb78353a931bbed3ad67dbb4191c022a4a0c1a9b58802a95f4369ea73d8985. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2d8e01d-c482-4c95-9793-5d50ded687f8.json and https://artists.proofprofile.net/proofs/artist/d2d8e01d-c482-4c95-9793-5d50ded687f8.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 0x6de36de67bf90b5c233a99a2c9b29ebe7624aef354251181610657c8bedcdf1f. 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/USL4R2005971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f9152fe58a1e3455317f6fab6c2f783c2dc9790aab7fd666eb0d82d8b03bf. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USHM22243441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fcb8e26371bfc8cf79f2b1e9119823f0b7b89de5be0c3cab4268f97601747c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:49Z), 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/USCGJ2359907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e52e80e4b357a4c4b47d51f3dc91f862bee07671465bd17aa29f340b596e4e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:09:27Z), 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/USCGJ2359908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995c3af0c18220d8b34e30098c0bfaef5bbb9523c57177242a96635985a2b989. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZWFP2406784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32cb599b341e6d2bea9a1bc8de65bfc0df7f7a8f99bd50e619d395ea3c57db7. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZFYZ2507388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6b4e30c91f53f507d179ea6f1426f84acb05fe6e0a57fe38d8a66356e4ac88. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7L2528843.