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 0x3f05c164145ea29ac49f1a68112fdbfdd3f3b084e0693dc9f9d38104b8f55938. 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/8a39adcc-cd97-4acd-a561-2d40cde6518f.json and https://artists.proofprofile.net/proofs/artist/8a39adcc-cd97-4acd-a561-2d40cde6518f.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 0xbd5b22f005398113fecef76744f9291fd27f91196b1b190073d4b6b8d8efe12e. 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/IDA632101768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da86ec7a61641b95c1c3d45fa4f86478280bc0576f5784e76d68d9eddc9f28b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZYHM2332437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd791548a6d708ef47f609623bf3deaceb318766caad7c79b26b596ac765e413. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZYHM2354192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61eb40e9b43a8cd8ec632bc95738d585299b0fb9ad12b88f2d18e3299107f50. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA082319246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f817288712496904f025b5ee80d8c6dcdc2bfc5f526fa4d94c2f6f80fe084a7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA082397290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9833c0982f9a7752ace336096a9c9f38f31e00983d60dbdb47f5b460de52525f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DGA0H2328501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3a58f40ce17e3bde385ca1d731171172a28921f2698a31cdd0b07461c811fe. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DGA0Q2351788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e9af0b6b49b744c8c12b9cc959adbdf741fc28c472c013a8fc81f7493c922a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ662414714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a2038acab4bdcaf5359568646f6d8e4fb4da1e80d6419db1630806557055c. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/FRX452499447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf193758b851d9eaa43cf3d30702aef74bbc7f9993eca158c8913cc2dda7a5eb. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/USA2P2461682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bed6d4ca943306ea772748fc83cf9396433ab6779f80e367c8b1b5e2905ded. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZWDW2473772.