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 0xbe140b8e9b4d8eb3bff436e205d56c0d75466214ae40067bb260ef789bf60d6f. 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/a043c611-ec65-4221-a47b-78c8d4727e8c.json and https://artists.proofprofile.net/proofs/artist/a043c611-ec65-4221-a47b-78c8d4727e8c.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 0x9aea46d214ca61afc98d39115c4ee74d609ed51a51c2043b030d0533d901d5f6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLFP2225452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda51bec712ee20d0be3eb7299ff0ccd09b6312910d4d46ca71da6020ecb807a9. 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/GBLFP2283683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c7a3caed96f6836d28837f9423acbbd4a17f28b5f18cb4d81c729624d6a13. 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/UKXN22371552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9074ad77e2a41b7fd94b766378f93a1f6cacb9a276d7ca30d2317848e578b9d5. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/UKXN22371551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e36d730049f18a9b22e1128e31323e29423e65e9def4fd2f32064167f22342. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/UKXN22371572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5838415f0e99036bc1f53163c58b0ea332aa6760c33ed9f0d074b54289e048. 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/GBLFP2406810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168283e5d340cfb4d6b18c414edd6693aab4558db394ecc9bc8e81fe726dbbd8. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/UKXN22466614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934148ce7273435d4c3a77258855ac22e39ab3a4115eac23ae236f73c745a0f6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22484818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62eeb5239bb3f3509c9ba7b47276cfeb0798df6afd5b618221f37f62ade5b9c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GX53U2418855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64df4f5d02d8634fbb1d0e1a16592a5f7b82ac06cc44e1d4667280d011074476. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GX53U2418851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd155d871c1635e5ad61e521842940233991dc49bb5e1ba7f50cd5b8673827ed. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GXF9Q2581360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc6bc68fd06ff397cce1f4df112fbc422202f2025effd228b6a7a4d201b61d8. 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/GX3Q92524795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0a0cfae50119adaccb5066592e67e73cf5a9dfdc128d039f0dd721ca54c3c5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92524817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfb154ffaa3cd8766c7b00219e2a50c33b67bc7245e813d3833fb9e0260efff. 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/GX3Q92524793.