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 0xc1a40e895258d5563cb4c67737fb2a714c66008811f5b11cc36c04524ff207f8. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/278bd75a-f093-4a0d-9f71-5a4464743099.json and https://artists.proofprofile.net/proofs/artist/278bd75a-f093-4a0d-9f71-5a4464743099.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 0x8c9ef2e09e55efd54bbd30196ebaafc4baba9484c8a8c85dda09939f64398579. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:52:20Z), 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/GBKQU2364569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b05020709580285fb3b10a89c594ab52300352fc102d5b698d1a83ed4d39d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:27Z), 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/GBKQU2364570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0836958385d9cbe1326379005e8bcb27a6760de150fca2a6cb98dd49a0117d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBKQU2364571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aa17a9a28fd19633925f7982132c00934e11d7fd5bc0e8bb134e51786e6ed2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:29:31Z), 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/GBKQU2364572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b0b29e0711df640f62b38e0d649cc1fb02f0e15cd2d47857e28a4893a09bd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2364573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ebf958df8871adf07e3ddb6d85046ea82cbb9c6b509ecf507b0305b6bfceb8. 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/GBKQU2364574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66645fcb2944754b8da08555e7c442d27f4daeb08160f323c5359d6f2b0df645. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:23:23Z), 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/GBKQU2364575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f56dab9ab3cd285849e9574ab1d849292c036b7053c7ee2a99dc1f92dbe45f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKQU2364576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bfcd8eb84a5b94d37c0b74d11398b49d2941af6527c1287046963907f6d264. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKQU2364577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392892b23ead69253caf46625c0622e054a44c2b09cc266863339c9d077b9b5d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:02:00Z), 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/GBKQU2364578.