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 0xfa72fc48acde3a2eea125c6b772ddad24a1bd8adbe563791d75bed5e94cb05dd. 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/dc656738-9679-483e-8316-880252ea0cdd.json and https://artists.proofprofile.net/proofs/artist/dc656738-9679-483e-8316-880252ea0cdd.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 0x7016e541036cbd8113b7a79429860a1f86e7d1dec2d69e166dd503740c0b8ec8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:45Z), 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/QZK6H2570600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc539de11edb79a067a776f5c299dc339c9e7d39f3013fc0a448c0bd2a8d551f8. 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/QZNWV2569528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c7c12821dcc655c4edfa58d0b0bc4f41ee959832e3b7d19e18e1450cfc9324. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNWW2553857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4a743cc0d7d1e109c05d31bb8acf637bcc61621416586bf39a2822adae0ba5. 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/QZNWV2571727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa071c44489ee3b9b0e487c8c740e6bd3d77dccd0e167e5f73c70e1874281dcfe. 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/QZNWV2575016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd31ac4ad3d61fced0e6f26efca9f793568f47a512de5cf5ac44689780bcc36. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7812424329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2b0072a508a453d08bde7eae748e945ace8a7cb94d3494e5973bdda5a78e61. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7812420630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee4f5b238472f3c49f369a6f2eece3f09b34b5988b2f10177980d03fc9e673. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812425197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f277e848493a095173f8baa292b3a64219260959dbe0f1a102ed15f1c61eaed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812528295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcc927f79531000f809a5fbe9eef054bc1dd4f4e61af77a7e1bda3ad27a67bb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7812421318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689784ac5b165e5367cc4dfd7cc7a834cfb73c611c84b321bc8d8b60de34b18d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812532105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e95bdcdb7f86d6083431517636af70a0e2e300ca8484894b7c0f3a45b18156. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812530484.