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 0x1a0a06637bd8ebd1b04cf8fd1fafdbb8855086ed2830a8949b32e31468b0dd79. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4dcad72-162a-4ac1-b0e9-5b3ad3ca57e9.json and https://artists.proofprofile.net/proofs/artist/f4dcad72-162a-4ac1-b0e9-5b3ad3ca57e9.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 0xc77715a5901803a07fc2bb5eccde5f07ce28cce2762226e7f76c8f14b68d6b08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA302200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4bd91e4e0418e9eebec41aede46054a13b2e82d9ce0d0ba319cda3bc05605e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA302200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b9b32c4a117b72e16bfda18d6fa18c7eb80f846c04eb12d7a9c016ade48d57. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA302200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6f16a25bb4d40a0e3f6fac8057add6216632cc6d1aaed280aa715bafe588f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA302200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f60b976a88204fa460e762d6ea1356811841218e9d1e770b71690a8e3afc44c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA302200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8950b6e64a206db0527f0cd32aacc82a8f277dfb0667fa9771770e789d7d65. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA302200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f209123f95fdb6c5b7ded7f52a7d4e6130a336d1a840706c7c0c2c2aa50ec4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRA302200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6562136457838c85f99e43d26a0fc539115891cd4b8bf29a180e257681cc2761. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRA302200258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0a326bc3cd151aa63616d24887fdf660499ff8b62ccc789f9aa3503197dadf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA302100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6b3f1b713ee9aa9e6c790912d9777ed87c39bf90a3a7a094dc11e28d6424e0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA302100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff09d1d0a4e45adbd3d74e0c991b5570cec75b53f765a85b903d433ddd8d7fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA302100212.