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 0x5d85588d764cf2edeed5858a7c2d0bc4176dece77a9eda5342ce89c842d52ada. 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/56d116ef-44b1-4400-aea0-c5e37d2917c1.json and https://artists.proofprofile.net/proofs/artist/56d116ef-44b1-4400-aea0-c5e37d2917c1.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 0x061e6aa9e8db61f1f1ec845afcee61ea0ed13c4942b2616b6ed4099f20c1d54d. 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/DEPQ62201284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3d6b765f8d4942a75eac00e9d7dd8f6194b1595fb767062be2b0c37d2c7795. 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/US83Z2311348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c21b6703f17f18f64b6c8a555c59fc2c5c1e2126efb9e91d8e806602ac614d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEH742309385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cd04282034f413422faf1841cf2528827c8aad6b061ee14545a63b37f30c50. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEH742309386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad22de08cd2222405dbacc3ce7a46d03ff83e41f4d55d016bfab6e6d3013516c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:59:14Z), 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/US83Z2480505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7465261bdbd2f408e0412e0a04c0935e6930a738493021a478c88727719eda5b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/US83Z2480506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcde91552d113bef5b8b2c7d0b4c3175b1959bbe10afec37aa061f17c7e1bc15. 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/US83Z2321903.
Paradise Disco (Überhaupt & Außerdem Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb384767c0a3bf7be9dca9e9f02f4b2f921cf7efbc1cc5c2c3e5b26a92b5ef6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US83Z2339389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9729161aafeea1bcec5e74cf64a55117d427b3bda4bb9716c72a98c21f7080a3. 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/US83Z2496089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93c43e79396eec34eaf08464ffe16ef4930ac2f904f5aee42b51df3e1fb3f8d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US83Z2524903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62362bae26f34c24a46b4e9a1bf89c3a235a91f4b95a49778dc2ada0c64aceda. 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/US83Z2526008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6d53f62081f591eae4555278bbbb3b0dab14d2bf7185449d4f502e0d7ee35. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US83Z2526009.