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 0xe71367f7e03a3bd3b3e8e949d83480e9082c40e46bcf4041045ad19e82c1ca7a. 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/2a9e9c8b-960d-4514-846d-12a16403f7f4.json and https://artists.proofprofile.net/proofs/artist/2a9e9c8b-960d-4514-846d-12a16403f7f4.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 0xd84706f9475385996ff4108613891e3c8228d4036356b24cd23f4e2c1d54f014. 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/BXRYQ2100983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f68ce1a2e4dad3c99fb3f75d24286f50a1a64dee3a96edbb2e03919a5306c4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXRYQ2100984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be0bfdd7571d4f06c4c3f2a49af22ca631795301836793098d6b7026cef16e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:36Z), 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/BXRYQ2100920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0a1c99856ade943e91614647b76239bb537d0b8bd9a2c4ead5eb6a53a190fc. 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/BXRYQ2100921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5851e06383ca0f80a794da24706dd122b3420f35cff58f10dfd4be911ab709c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG1864861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0480d671eb79fe91a5e4f2fff6f49fe81a7f8cd77bbbce5bfd5919a428edb70. 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/US7VG1864863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f842db65fc7f2360bf4124d90d619c25ef843f64f5db163dbc93a8d3b62396. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRWRK1600019.