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 0xe13fb977d38cc3df474903c710d02f3a9b1ed5c867107c7018eade917c1c3b01. 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/4ee11b01-1b60-44d0-90dc-64bd236da608.json and https://artists.proofprofile.net/proofs/artist/4ee11b01-1b60-44d0-90dc-64bd236da608.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 0x111242cfe0f74a9dd0f619b7eda1238b5b44928b87fedca681f0365317ad2329. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/ES6119855906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbea309d15ca03856760f3f6f76867722e0c803e861358c01f09eeff777314d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ES6111168908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5dea01eab826d10b950a4e1a8f7fb23a595a602099b3e7ebef5e58b361f7ab. 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/ES6111269601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cb84e8d33c14cb736d7d9007cae209cd870678770965c037bd82ce9ebf0ff6. 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/ES6111269602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f502e72852f15bf1b1be678a9bc34fd169395773783b4d916c35c4da9033953. 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/ES6111269606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04d051707887562e5859f7f3b7e09d53a9a5814da3f2ee02b6637d44a0d5ab. 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/ES6111269608.
Punk Rock talde soil bat (Zuzenean - Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dab800f5446600040a9fee58f7a7abccfbf8a102954d3bb7b65c390f75b0235. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ES6111876101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28afbbddf695a3b2fcb9fef5547e99e53a3aaf1eb830ba0e899fc2d3c8f9c2b6. 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/ES6111876102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634d9143698aea0bfe86c0bad01e9ff67673074bda530bdc3dfd9c71006b4388. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ES6111876103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9c62837d0172f9ba4ddff8e2116cb7fcc1dea67097f9f9ec22a7c4af34ff00. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES6111876104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06139f13c458cfd2854037d75345f3058181da97d3918e0a91fde4403fb33da. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QMFME2343919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0745f57e72fbfc403f2bb8d95c243854091e8426350f33afa98ca9ad95e214de. 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/QMFMF2351949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa05525255e1a562669f8a09e3f33c913e56d68f6785a4c6b5ca0dfe04a9e10. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QMFMF2351950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63f48081405a4ccf377a46683d5e290180453cf99f64634edf75b04f0371c0. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES6110261002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd36afbde1c86d74727778172ce104e98b333097d14408c86ec475138fdd4b78. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ESA012557372.