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 0x3e6bbd404bbd0502c693ec1685709ea9ab6d79e8a482d3ea5dacbbf55d6191cd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e526ba89-81c2-40da-b6a7-1935644f938d.json and https://artists.proofprofile.net/proofs/artist/e526ba89-81c2-40da-b6a7-1935644f938d.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 0x2dc99d6bf4428c0d63549a4ccdea89bc6c42f8d0aa634378cfccc634aa6bb5e2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/AUZXX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f43cb804ffea5587356ca5e1d6adc6278dd3d1c742f0da06b4d59ff481f63bd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AUZXX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ef4800449e10973df7d3eadffdac0a651564fc18d8d4226b45faa0dafbc5c5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/AUBEC2043156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d1366446eff67ee4aa1fc9e5efb5206b30bf33eb9866c9ccd1191048e2ac29. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUBEC2134914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27105904ea23ab35c3c018d7cf7d5a4c236b2505e987c5dabf70dd5d71d62304. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:34Z), 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/AUBEC2077193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34927f37dbec661efc0469b8385459c86df479db87f18f140537fd0d9e64acff. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:50:09Z), 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/AUBEC2151319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1361642d26b7769226f9f20b42f7ab203c7d5e097b64b8c43a0c57f90c52db1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:35:39Z), 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/AUZXX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4663ce15a3174afd82c54b6383301c518246095135931c3bab36411a93bee3b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/AUZXX2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b000e50304918603aedf1df6ddeef244f851c15ebf22b48eabca25a15a90bc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/AUZXX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb16f80e7c5d4d7ea99e80405e9b39437488b711b76bb9509077e8f66448afaa. 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/AUZXX2500002.