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 0xf4cbe7c9cb2096f59d3db0eee879546dfe63246a06e1cb86291ae86be01e0ed3. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc3237ae-6415-46ee-b366-168881c226b6.json and https://artists.proofprofile.net/proofs/artist/dc3237ae-6415-46ee-b366-168881c226b6.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 0x70e1707798e19405efd50715e33b211e31b662566b829a412b0c46791f3ec347. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:23:29Z), 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/QZAPG1874832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b6f8fd13499adcd1b62ba6758b96422443cf2a1b7e0014328106d765d5cdbd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USDY42508080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9a78a3bc73e3e356b04f173fc91f05ac2dff499b07c23a02c1f92615140397. 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/USDY42508086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffb296a9e5a6cde1b427f0a5960f29f8fd990e641b5cf85d5f3b3a5d2f37941. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USDY42508081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf978368b7d3072ff13643c66e66e67b1023d4cc54d1982888a8d18bbe972009a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USDY42508085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd6501bf3ed92732f8cdc70f38e45dcf383d85fc1a6d5e6a139cbe722c3e41a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY42508084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933c9f10c79dbc2df966d6ed0cbc382b65c8fa8e3cc9d29f7de12b5f17505009. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:44:37Z), 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/USDY42508083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc736607f1b557d59af1912fd5b351f52d9e44cb9d1f9aff5681855fd887e3490. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:59Z), 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/USDY42508082.