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 0x637d8a72f50ce784a5b4aba35d119a4905d215b27b197171372a09bcbd3b83a9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9abfa061-47a7-48e4-a1d3-d2b6d9fa983d.json and https://artists.proofprofile.net/proofs/artist/9abfa061-47a7-48e4-a1d3-d2b6d9fa983d.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 0xe2c0e93c768cf0c4c8deff56332dcd7f6b18745e913b4124fe4fd04d25ed61bd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEN120305094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbc3f55f732093b42ea90662599d2098a06103546313c4f1aee5c5f3c772487. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEN120305085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1edfc6cc9f4c996b784e1296a4523a0d3599d8f13714f5c84422cffea06f25. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEN120305091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95cfd9091ed4310a1dd5c61c07c38e9851450ec9818e92dabe63d641610baf0. 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/DEN120305100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6807dcf634fe7941f5cfb1fe96e615c397ca2ee0044e38d7e91ce1a92ec2d879. 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/DEN120305090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612a84f321345af7c09db64214118836bfacf45251d49606b39bc0046702c21c. 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/DEN120302230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8060792ef7ebfb9a9d2b216d8cccec5bf5e0e11f31b86dc960c41bbb5f10a87. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:22:17Z), 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/DEN120305097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ca2e2da2b5c6265bb58e7af0448d44f117447bba79cecbdb955b925f7193d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEN120305095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9e0ac8edd21e2d744cc2f762ed2023b684dba13265a14bd10b1cbc31877fe. 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/DEN120305096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ac2b8d80a79baa6f5799502e79d2bbc623ae10c3b9f9b8b753ba3ee4176708. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEN120305092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b2c0d1d7d6d89e19766da4f6ebe12d68076512a746889b678d07ae67d3908a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:39:29Z), 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/DEN120305086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae218b39724623685b6b19d9544c6512540e17a09009dcf503f8a6971f55da. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEN120305098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01375ed6e982a01410a4fddc2c3f28fc1963c3aa60e9a811d47273b231565dfd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEN120305072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7787feae6f08c72fe6bcdce211de1e5b89f36fefeb4f7d6319c10074ba2624. 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/DEN120305088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72716784504d99bd887f8d07f7cdc05a3856be9af1153a23730c88bdfdc7ffe. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEN120305073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c50696e3d71aaa1a97f62dfe83177008dd460373ec5f55183a24dcecf1c9b. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DEN120302231.