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 0x0509895439b6a61b989f2f3eda04f20d8ea4819691a94eff4cc8b2198c9505b2. 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/cfea9572-1ccf-45d4-9eb6-53cf4ae6b91c.json and https://artists.proofprofile.net/proofs/artist/cfea9572-1ccf-45d4-9eb6-53cf4ae6b91c.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 0x9b2e8487d7d89a2bdd76047460c92e10ccf5a0b4a9cb07c50c6843fc5af8a6c7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:39Z), 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/AUGBT2401305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97332a9faf747307adeecc3d9026b749e02aa99fb53c4c639325de7a0f968b11. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:06:22Z), 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/AUGBT2409064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c18a38b7014b4d28178c57c74369799a6d6b078f87f14014ba6bfae106a243. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/AUGBT2480762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd099ad94ef5e238631f370a1c9c0c07182a6eb2b1f896b8cbc99fa26cb697d6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUMEV2507857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dd6dc22d34fe78221032def3211af9f1f8df54d918721de62c7ad9248f2cd1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUMEV2508588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe625a50e4054eb27e5cdbd31771d966e48aad7d10b5eb621f855493cbd8291be. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/AUMEV2524765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b8a43b225b40c4745c335b3f8a46e7ca345780bf17fa0c60c3fcf2989265d7. 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/AUMEV2535056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa857a1e6ac023f9f22a4a46b2bf4d1837b78c9f9f3731216b53a3dc97bfcc61f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUMEV2543252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e76f544798baa011e0128b6c40870a9fdc9c7d4e1ce2e51d1bb4f2d4fc4a41. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:46:20Z), 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/EEHM52523169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977d053c09d19145e9a3a90effe711a356648057c172c5f554c857fa26a780f0. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:17:29Z), 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/EEHM52522922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6869aa9bfc6b6b438ce349ff82cc31fc932daed09ea507fe365f8e4f6ededba. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3FD2564529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f36ae364302a40ada59ce2a4d5ac1d41dd7c8f0044563d684c060ddb74653b. 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/QT3FE2507060.