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 0xe526dbba87d681a274ca76bb3fe14ca25fa1fabea4620d6e359872b25ad7a39f. 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/b27fb19f-6d46-425f-ae0b-d251409a43ed.json and https://artists.proofprofile.net/proofs/artist/b27fb19f-6d46-425f-ae0b-d251409a43ed.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 0x152d57537235a08feddf66779dc6e43f86d10ef3e8c88995c08eb010e219d41c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ARIXB2310125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fc6de514989657311aced0526a0cf9e5ca0fdbf4a21a8edb47fa9269f731e5. 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/ARIXB2310136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9643bc00d5d3e65149e533415dad0ba97ed2d390356600ac44f5362370d7e4b. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:58:57Z), 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/ARIXB2310132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae8e66151491a841531b9a8937d33cd91b2ded60c3b6f3b71ca3fcb5062f3e8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:48:45Z), 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/ARIXB2311352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53893c3d72759d255e46d4f6ed0fc0bf23bbb48a9ac543e474f42988a5332161. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARIXB2311577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bbe0033ed5263030e6cdf98fdf1322c56dcf215fc63604e2893d4e3085b393. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ARIXB2312875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8964df2f44fcf20d80a2a45e5bc59f5ed1f137c39bb03a2027d5dfa4cac6c7a9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARIXB2400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686f939ab03e20c232b178998c0dd2b5e969538f3d32e9e386c1b56fec74e2b4. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ARLKP2400134.