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 0x6b7f9269c018d477760ad0102f5be453b1220e1573efafc661af8c7635fa3e89. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3cc3f39-30ae-4ed5-ae62-502891505811.json and https://artists.proofprofile.net/proofs/artist/f3cc3f39-30ae-4ed5-ae62-502891505811.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 0x46f347f4461e2ee3f4a6a27fa67b4f1669c2284905492f65236212d0018b0e44. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:57Z), 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/NLP421600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d91136e5f699675f3b8bf5ab7f0f0829deb098a7e4f45477812c8eed6ce956. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:45Z), 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/NLE870971801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb39c2f824668cdf87a2e5df38b0ba03da554467ce5131ec978dfab8a39c23. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:43:23Z), 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/NLQ901400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1868ed7e3b855400ca16a9d05638e7abe42ccf7c6665df74b5c5c01b0510ac89. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NLWF31700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93ca258a2b4e87d15b4a209371cf53f85c8ec6f1cf21d3ea25af025e2b92786. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLXN62300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e3dbe37abbb6671ec5949dacc2815ddfe91959afc73bc5d64f2d134d08d165. 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/NLQ902400028.