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 0x45b376ed23426f652bfffa58add343512f12b4b0bd4cdfd2e751eced4843e2b2. 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/a4e09701-e404-4b31-97c1-bc669f936805.json and https://artists.proofprofile.net/proofs/artist/a4e09701-e404-4b31-97c1-bc669f936805.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 0x4888f30ab465ce8f07b35ccc1664182ed1472a225d095f0cc81f88c183274915. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:55:35Z), 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/PTUM71300653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed736351f7f80052377fc5b821fc30288e3e1dd1359ba49bd82ab9c3e5436c5b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/PTJZ11300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e59432f8e43b204bfef2b8ece8396d4e6bc8879734cd8b660fa06a52101cb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PTJZ11300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afcd73bf8be8066fd1cf20f6bdd21eb3dcffc80e5a1ca255ea73070bd460a83. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/PTJZ11300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3a4feb003b533d3f503008eb002e0dc14ec5d85076e168ca452f3e2b157d05. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:52Z), 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/PTJZ11300045.