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 0xe2284dbc35d1d5262858412458d85518ecd0e9497a21b7f6ffa16441829b7bd6. 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/4c26d601-a5b9-4588-a94b-568bde9e71ac.json and https://artists.proofprofile.net/proofs/artist/4c26d601-a5b9-4588-a94b-568bde9e71ac.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 0xac85135e5b8779fa39aff934181871291e591502f621042e4c3b042616a2e8cd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZGLM2156961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9377e8272f81dc68197d740519322d50fe9d5e1bbe2ca87be2fc2d8a39caaa. 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/QZGLM2156965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9783ad31906f090714c2d0c3f7e3782f3f55f9da2e9db6d499b6961714b8af3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:00Z), 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/QZGLM2156966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38477daa0a333cd96a3657301a7ecf092601121f5b575d04f11bca054f8eba8d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLM2156968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd012063c5e5ec8ef26ef70f4721b0a387ab269ca1ce6ff86570fde6cc4f56c0a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZGLM2156969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9426988d4672a12072acae9a83b86f16b012c40d4a28a8d002c7379d2829b76. 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/QZGLM2156970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9221b34deeaf652ea28024d6a4911add2ae260489ed354153b4f8cfdd4b1f7b2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGLM2156971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13928ba97c5720236598f00b5902ad92f89d0d8c3733a3ae53c49aff08afae1c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZGLM2156973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68049ab80fd2e436d04e71cb15dc78f7fcf98674f3b6377b3a8a9efae0e600fc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:21Z), 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/QZGLM2156978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f4090901c38c911d7d97858dfae5d85a2ee1d07be10be6b59d6092f69d8c69. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZGLM2156979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e00b084901fcf1a01fdc9fe931741cbd4248f7d17e00d2ef355fd14976be14. 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/QZGLM2156980.