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 0xe56b676f935a3ed86a3a27bfde753cac0518c74f5347f8d3ada4af1b3cf947b8. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/327c97ce-edb4-4c8c-97c8-b066e450a08a.json and https://artists.proofprofile.net/proofs/artist/327c97ce-edb4-4c8c-97c8-b066e450a08a.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 0xdcb3e4cddbdfe1700071bb6aaef0c41eab3bc1b977c7ded5176b982982bc97c7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TWAH72406301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e6c1af58e789cfc7c75b83bcb40a19431c6ca7e414accf6c58f06d97325b09. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TWAH72406302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a34fd073172e430c9df81c71b4fbf45293bede1180ed515eab9ac765206347. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:38Z), 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/TWAH72406303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f52a1f8f77e1f1675403be8985127c6eed647bab208afdfacd97ff66e74bad0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:51:30Z), 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/TWAH72406304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec07ea39de27b4422e882f89bd642716913d1f34b61d0c9050abccdb5c786ee6. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:18:31Z), 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/TWAH72406305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe518b8c0e93707000f47bf53ce809222001e3212badc631a78c46f216f838d01. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TWAH72406309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06e2b4d20a61f725b538f521c7285aabd8eb7fd0717c27917aabc32f7815b94. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:21:34Z), 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/TWAH72406310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b806add12b66ea9de0340d195fca6274621454abd780dbd789e319a2f367974. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWAH72502011.