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 0x70cb74bd9ea500abb96afa9bddf1539e9b7e8c4095d374522cfcea4121195525. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c88271c-93d4-44a7-b438-43516aa8bada.json and https://artists.proofprofile.net/proofs/artist/7c88271c-93d4-44a7-b438-43516aa8bada.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 0xb404db62dce83ed458f5cf82dbba4e63950c5188834bdcf8ff9baca18a403e45. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:50:12Z), 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/USQY51244399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed22c1323b4109494216434b606f0d2de73b37005d0134475caffde9bb7392e6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USQY51244400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50146c286319e169f4a66340b5a8a3fae38b5baadd325459f988535ac3c44165. 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/QMDWB1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ab7c2bd7565835f39e40ac39cc4ac7d5c31819b1c390085ad0c4d4ccba636f. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:30:50Z), 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/QMDWB1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe712f1207fb2d2819f8b4aa0bca600e209e0ca234178005855afa85a789a1a29. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QMDWB1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd1187ea5bba7ab729b80249c5a265a3f70fc170fa35c0cced9c6f31e1cbe37. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:39Z), 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/QZ9DJ1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4e6502db364d69658eb6d78e8db061a22a377f1cbb0e7e8580725c111c6c33. 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/QZ9DJ1700012.