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 0x452e3e7e4b77d9578198d117a9c4d873f69a92ca568f250c48734f4b15b0f3dc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1047585-24f1-4a20-a26a-0119ba321bf4.json and https://artists.proofprofile.net/proofs/artist/d1047585-24f1-4a20-a26a-0119ba321bf4.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 0x9674f167fa65c588cb19e67f301c7f5fabfe94643d3e49440937a7e325b8d560. 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/USDY41562938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9285cf630ef03a558aafc92b85d03ac22e5b3fee37d4005c09a5b4d9f9489a0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USDY41562939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d53ae9f5e7c916379f8e20193537a0ec33ab6eda0d891cad44b5686f1c4ca58. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:44Z), 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/USDY41562942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aeaedb0077500a25f23261bc67f5d448eaf4e3889c17ba2b3b9d2583cd62f2. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:36:51Z), 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/USDY41562948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5b42a1ece37baf9dab0e55b417277fa42cb1e773f992e47a9b979300a631d6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:09:29Z), 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/USDY41562950.