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 0x303ad8d3d03ff67b8b72c5dd0b5e9ebd485a57fa88a5ff13f011a22247123f3c. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e24c3c22-fd77-49e9-8655-fcd394f5d2ba.json and https://artists.proofprofile.net/proofs/artist/e24c3c22-fd77-49e9-8655-fcd394f5d2ba.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 0x7742f06aaea46347c46a2eea9f809eb2739411973e503ce6cb6cc6cb69bb469b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZPLR2327252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe21f1579e41fa229701781cab14a2d227a3477009c57aef2865863b6a340acf. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTBB2388934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58206ffbf719a7dbdb9e1151cf890cee947d70ec4ab2d5f30790c3ed32105188. 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/USX9P2398735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a5e3f595bf05c946f93eb6091b71c833ab9be48e4bb10832c4038029ff2321. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:17Z), 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/USX9P2398734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc2cea29f14b177232a8e862b35821aac10492aecd37949449e75964f2dc470. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:25Z), 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/USDY42435097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6fa19fc7055007ddf33c82543eb0d4beba4474bec040298119637da13973b2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:39Z), 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/USHM22463247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc85a7bc4783b1e206f2bd830e18f8a98ab9e91be969b3f402c080762c4fa81. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM92419729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6111e0bc55303c01e13009cde4227568b12deabb665f0d957f1a727aede7d34b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:43Z), 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/USL4Q2496892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d1761b431b58736de492e9dc489e738417d34ac77aafa3cea689c285a23ce8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USL4R2506063.