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 0x28ff7dbc70629163030dafdde96b07a63a523de5dbedcc810baa2496d93a54e8. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3548ec2-2fd7-43f1-8d72-2b58a04a2923.json and https://artists.proofprofile.net/proofs/artist/b3548ec2-2fd7-43f1-8d72-2b58a04a2923.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music For Dancefloors: The KPM Music Library
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 0xe6215fae6369465279be0dcda236315f862d22ecb689bcf26e4591999f0d4e66. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEG931390740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562fbd2d3794ff448169817f5f942ccaa61c88a74dd31cd6ef03d18ce672e374. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEG931390744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550527ab8308a86394c8abc1c358a3c6c4a28904f753466120f6eb9a41ac9035. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEG931390746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90148434ddf9d360dc4ead9844a2ff2ef0d73a22f509951f3e255452b9ccecfd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEG931390747.
Theme from 'Dave Allen At Large' - live at Jazz Cafe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd731b6418433ed628f064c961f07827f82f09f13cefcb336b48830c4591859e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEG931390741.
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 0xf08e9d4e7f7b498e94e3af685247dfe81664c399c965f2a5bbc810ce3ff06f3b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEG931390742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc6e26da4ff88fac4aa8264914e5ecc36bb4cdad729b4d89f337ebefffd7097. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEG931390743.
That's What Friends Are For - live at Jazz Cafe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e1c702f55c3d48bdd61eff9fe89c9adf93f793001521c7fe360daa3882e750. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEG931390745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f6b4109a61fe18b1f34d4aa4e649746aa543e0351b6f65f1f3c8657d943597. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEG931390748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ea695bdf73068bf3a40c8fe05e0973ab734cfd91790431fc57440bc9419704. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEG931390749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9652075fc0ce69f0c92033997d46e4f991eba20b7cd366b5b8245b5ff61d336c. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEG931390750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e78b17ed34c2ba8101f9ae8a72b5883af8aa55431bc66ffcb80c33865b258d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEG931390751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2657710bb145124b92aa35b35f0c2e28abf7729e4c407e58547b6d35e907345. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEG931390752.
UK Sports Theme Medley: Theme from 'The Big Match' / Theme from BBC Wimbledon Tennis / Theme from BBC Athletics / Theme from 'Grandstand' - live at Jazz Cafe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80f0b4fafa09d8f5ac026518a48a4b0b8e656a8f27edc4cdfd361a6e7fe2ce9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEG931390753.