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 0xfb5ff8bac917657d194614a073682ceb6d7e480c471f0ce671f92cd740367489. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/759f6606-da61-4ec6-ae23-58b63ad5d7bf.json and https://artists.proofprofile.net/proofs/artist/759f6606-da61-4ec6-ae23-58b63ad5d7bf.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 0x3d99b06332b382074fd544c6a8056cc70a3550814a6f108359a67484c2febced. 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/SEYOK2100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54706bb5aae90c827d60284e337a61b697e0b5851be8585cd5341354bf831d9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SEYOK2100318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb514d9df45fbabf43b7a92b1c9bf4d83efe6b4077f0f4e1f4bf92a48846b9d1f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:30:00Z), 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/SEYOK2100319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebe9636022ab2948c67ce12411cfbc20f0244c876bbe10ab50f5e0ac0ea4a35. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:24:07Z), 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/SEYOK2100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b2dc1a22a0b129946b1dbfc3a62894e418cf49b359411568519be53932cbf5. 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/SEYOK2100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e600bdb775afd6944f0075965dd5c48f72105098d1bb3cda48e714916b06da. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SEYOK2100322.
Polska efter Omas Ludvig Larsson, Transtrand, Dalarna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11706fcb54fbf4e3465c1bf3ec8124fd8fef463e7a84263eed00d9c2ae8ef7. 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/SEYOK2505052.