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 0x0d642deba42c961bd0f7032eb68cf600c722326576eb1ad2cb26f092134f0a42. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c06aa61d-5f9b-4cd6-93aa-9906d6887cc2.json and https://artists.proofprofile.net/proofs/artist/c06aa61d-5f9b-4cd6-93aa-9906d6887cc2.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 0xea168f4872ec720600cdc1c1f4eafa44d1f4d8a9da31c8cd530168fba17db793. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:19:34Z), 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/CHB481800520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda31f20682415b8bbc820f248ccc83e6e1d07443f407ba276db61811c94adfb. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CHB481800796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e511d1a5e3eb7d0e531b18cf68306f074cd09a3396bc694be07cbb0c82a857e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:49:22Z), 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/CHB481800798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01f5f7288f324c5d564a2478c58f950f506cbd22b0fc743ac68c28d747c7d2b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CHB481800900.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20eaea3ff95e850cd51f2381fa3e2b1636a79e27847521ce97df3607c2635c05. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:39:52Z), 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/CHB481800994.