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 0xd242c550344979a809f06d629bec468a0ac0046c959aa6e21146fdbb96431ddc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc052bf8-decc-4cc8-804a-2aff97c4d528.json and https://artists.proofprofile.net/proofs/artist/fc052bf8-decc-4cc8-804a-2aff97c4d528.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 0x58143442d5243f2de89c9cb4d50465fc735d0fb19d67a74f2ce48429e0deabcf. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZ93L2201934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0c377e3f4543ab909698912b2ec065ca1761f8327c247f5907a9b4005ff7f5. 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/QZK6K2300378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dd6e9e69ca83406f9965634a77039ec5848d5743cead934f590d7d8686a596. 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/QZFZ22468921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23568e7e77d0294edf74e053e14e052fe92cff9d0d213449341e1834b5c5393f. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZFZ22468922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bad4e0499a4e782a9d842fed7d3f0e54b3e45429d0a01e8eda8dfed932e837b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:52Z), 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/QZFZ22468923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f3f9ab5d8e148572cdaee4d980dc135aaf632a9312dd1138b74006a68f9eda. 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/QZK6K2337035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b56a537e483cb242816a574599b194bc2c06560a3e2597535a761e9456dd939. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:44Z), 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/QZTB32398150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bc47fdf700f9d36eddbc634d85d1253aa11de46c210804d0534f777f389fe3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:40:57Z), 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/QZFZ22468924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78143a7d162ef0d46e37784ce299917e7b458a55dbfd897dd62a123f78f2875. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:29:08Z), 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/QZFZ22468928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2489b9bfa9e4ecd24339ef3aadbcf534511fe0926126d7daf7d1dbd52a9faa9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USDA12307304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a32114541530d11672c2ce3abdc0f7493938997ed4a79822d0cc361453aaa6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6M2417381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fae4483e49dfffb26978b4ad030fbdd5277236568cb3edc9c384766b06c587d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFYZ2555842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe161e3a1094c4a9a5dad29ed671a293985aa84659164685f2a7fadcb16fd118e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFYZ2555843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a32114541530d11672c2ce3abdc0f7493938997ed4a79822d0cc361453aaa6. 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/QZK6M2417381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e24884c8484cc26e01942f671ce7bf8eab1b1e8b0a74ac0808eb763b5608ae. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYZ2555844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c3b0b30c483aad4e649723f6605114dc2c917ae2ded7825b876d4460f3dcad. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYZ2555845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f95a9c8f6f0d376c090926a732cf077037b0feb708b6770189eb720582f2e3b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZFYZ2555846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2bf41abbbb0645ce33de3ed6be80c2f6a8eb207c45a17a54504295f5ad2065. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:29:37Z), 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/QZFYZ2555847.