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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 0xe6b63d615a0f28f7d4106e0b21f7392f7304f44958a7f6212efe70b136a49225. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/126ff4d3-5b06-4ea1-9f58-977f52c03dd2.json and https://artists.proofprofile.net/proofs/artist/126ff4d3-5b06-4ea1-9f58-977f52c03dd2.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 0x541945001d06bc6e85c5893dfbe33656a413304518f0799387282eb25438b3d2. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:29Z), 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/QZHN62306497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cecb6f418eb764761dacba3a4b0329119d287cec37828c34cefc6610921306d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAZ2335185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede3e00f900bb00150c65b9a9223b2cebf9239a5b3e735670a5ce1e08d990e5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFH2371392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4d21b3f70aa896c7ba09f10d4a0d87ad6ad89c4a16254540940100c9ca6bc9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:50Z), 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/QZZ792412515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f00d7a1a7faba9a952879b1b07c5c55c4d25cf66d827e8feaaef4c91b330ef. Chain 2 (Bitcoin): anchored in block 957535 (2026-07-11T07:11:01Z), 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/QZES62555262.