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 0xcfc2450a7dce5e8cc523c493fc0ddd250699cf36bb972c7f695d5e3feddc6483. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bf982d6-9b4f-49e2-8d0b-6918661743ec.json and https://artists.proofprofile.net/proofs/artist/0bf982d6-9b4f-49e2-8d0b-6918661743ec.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 0xe3d8a5fed1d27432e4a8b3cebf4d1761797ac6fcc7c72a6455aaf1d8399abe0c. 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/USBHM0510155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f2590012095347ebe2ee631a6711dcef4377bac12f37dbb2246434c05ab281. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:32Z), 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/USBHM0510156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2272e4545d3601b06bfdcf8b3fbc7ced2be55068e5ed4238c5a05c08e777d553. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMDA71550274.
Sleight of Hand for the Down and Out - Rarities & Unreleased 1999-2011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b902e59d3c94187f01f75374aeeb2cbb2c734325b4abbd4ee85f499f684e9d. 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/USR7P2522306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aa2ddc9531af20ec7d09dd1fbb4222e90c21876531c460dc6c692bcac51b62. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:59Z), 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/USR7P2522303.