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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5759ac7337feb12b6028082d24a1d6bb2dbb4878fb857b01f6f4ea3e7c765d. 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/11527441-4f79-4283-8aba-c9d3597e1c55.json and https://artists.proofprofile.net/proofs/artist/11527441-4f79-4283-8aba-c9d3597e1c55.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf5cc23c3492c884f873c43277f65275261b7f51fcea40aef3cad056bc64631. 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/DGA072378790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093d1258fc5718f3b09b0cac693673128fd2b5d0de839ee7b674a4e01373e62b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DGA092373126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f455cba17ad3071f3a29cf8b6517d324de68a8c42d05f8bdb28b27d8f0de722. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ROBRA2401116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248ecb896d8b0b4b7d6bf61ef1a763954aafedb31ddf663b96f81e45deb98da0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ROBRA2402165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190affeea80ef240cc9bc0e9d2ff8f9f86da665af8591329fec73d7166417fe7. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:15:01Z), 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/ROBRA2402350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35515a6b6312c0e64b4cf8f3a6438c97770f7a9332656b0dfdd9464a1283955. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:07Z), 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/DGA052491037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106e1b40c8bb8039712398b948c31d179276d5f02af94d089fd903b23dd6eb0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAIL2403717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1500e793983163a4b6f6d6f749928dbb9680ed30d467afc1ed060c420877a46f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:15Z), 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/ROBRA2403468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c44c7f2e01e1825725495a7650c796852679f5f62e6f1fd3af4b1431b46094. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ROBRA2404971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995f6bf86da4686e02b4af76910eccbc7a399d0c90cf89d72f385eeed747edb1. 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/ROBRA2500464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98828b59f9fb135748bd07d7c9c20bf77f36905df01bd5cff0678b6f1b893e8f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ROBRA2500857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a3fa1295415246ec9f4193a815e77181575764f3d5d0c31e782c411bc7e154. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:36Z), 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/ROBRA2500856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bc449947cdd83ef7d52cfb08bd3fda675904b12e245c036a211a9c7d9b61ee. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:41:56Z), 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/ROGRA2500291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d31be5f01b3132131709eb3842ff7d80e577e26e4b93a137b1916ec8017301. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:01Z), 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/ROBRA2503862.