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 0x42b4659bae1a35eb4a65505b699edc4abd849dfcb49b609f6ad50c794be0f623. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1083a4e8-30e3-4460-8ddb-3c0a8ed65565.json and https://artists.proofprofile.net/proofs/artist/1083a4e8-30e3-4460-8ddb-3c0a8ed65565.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 0x60348a7628897791b6f972cab6f9c74c7b82f589c5de68d9e7f64bda6beb078b. 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/DEA558800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d43aecd715697ecc0791dc027ea9094c73cb1b8e34a50bb3862780c6c04e5a2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEA558800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512ff42e2dc3986eaf9b4c27c465aaf9c34aa0c5d6fe5b61d8f29158b8a9947c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/DEA558800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0e694c3588f7761d4672862940273c90ecaa4f338f90d9c286a8037765d63. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEA558800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83221c01bb383ae3c7fb0c27a1db651f48639a2ff47d057109505189037a299. 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/DEA558800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f0272c80cc529fc5661ec79ea0a463766362aaf2d30bdcb3bfca840ce4a045. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEA558800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e69cdb927cd5bd2a83638e1b7f8bcf23116eff1fa63a7824193d544f532f12. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/DEA558800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e68202e23919cd177230486d54ea1e1761eb3df3c52c60e75b495a58face45. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEA558800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2dd35f5d30c1cebdbb969981a5774289d5216d25b3d6211f1e62a793675a75. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:54:52Z), 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/DEA558800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9468bfc1c3d5e86566926b9a0d0a4443eae77ffe792498e85d13e84a01547e7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEA558800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fb8ccc8f92d480c2fbdef5687a3f167d7f8730fbd9b0d17a8fa5a04f188afe. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:02Z), 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/DEA558800042.