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 0x30a6371d90634f79e453578637a3b24d6c8e1f51bfebba6a8b6de76fb5602d15. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1282b408-7fce-4b64-ab4c-f44694f08ed6.json and https://artists.proofprofile.net/proofs/artist/1282b408-7fce-4b64-ab4c-f44694f08ed6.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 0xe32e81ee7d94ae63b134f7cd063f80ab056337be885e9f1110f6c315498be451. 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/QZGLM2157059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20978815e8ee6e78c924f3fad8e0220db53cfd7fa3232ae9a3f7e196aba38d60. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZGLM2194239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854047f69126b668b935dd2cf1dcebdca3c3cd652d19be57157fab130993ea7a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:10Z), 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/QZGLS2153437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795aeda6d5089dd3caf08ec572b681eeaa5d700332e8449589632486b5191b7f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLS2153639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c94eb5acaf28089b81eb78d3a1b470ba81d7eabe14431a652d62d842a0990. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:26Z), 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/QZHZ32160598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9f178c663f943f76edcc6fbc4131ab509519206cfcd5ed922c0918ae32d1ec. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:07:28Z), 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/QZHZ62141687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10efe18552d5c2df5faee1c131ca837487dac68743ac84fd6cd54d1e475101c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZ5AB2298465.
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