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 0x0660888856e2a2d821d1ec458fb0988e35090e0a857f0229a9ed9398d34f56a1. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25569e40-2e8a-46a6-a1c8-879e02a522bc.json and https://artists.proofprofile.net/proofs/artist/25569e40-2e8a-46a6-a1c8-879e02a522bc.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 0xe3134d5c68cdeef89460ec8d2a200855f8851aa854ab5e01d64439ee91356119. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AEA2W2184817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4819f6f93aafb9edceef3ebcecb733a1bb3415e187cbe20c8d84464aef41f974. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA2W2184819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec15e49148e80cb051c8582591a937c912e341a2354df840f2f9a3009443a15. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/AEA2W2184820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba47fd4a16fa4f199f25e6d04a164919f4c25ad3030e1b871fc9022cfe58efff. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/AEA2W2184821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6414a0e0ebe67fef1e7b80ccc81c60e29e451bdc2e8de405da959fd26e9a8a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/AEA2W2184822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0cb955fdb63c1cedc2f1ced7017999ebe6a7bd7d09c9b28f107d235928b555. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AEA2W2184823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21d17ac8ec0d2d3e1d21eb115943f0abdf040c18722e2738d0b5b5922fdccfc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA2W2184824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe299016731200b4de297b5825e63be030d60776886ae769e1f89ccdb1c73364a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:31Z), 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/AEA2W2184825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ff1eef27afe864ef851a90188ac42001e09b26f0d057cba49237535c438de6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:24:14Z), 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/AEA2W2184826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8470430acab316186f38b23dff6170b4e4a2e6c5c64cb22b409a75c097b23a1. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/RUA1H2510629.