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 0x279f844dfc915b957a757a0da70cad8a2d53f473bd0144d6c6d2cecca74095b2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/800f3138-0977-4ad8-9ac1-7548937f0053.json and https://artists.proofprofile.net/proofs/artist/800f3138-0977-4ad8-9ac1-7548937f0053.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0c688bb30557ecfdccdcce0947d4e0d0b1668b387eb4467cf49edee36ec0a560. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:47Z), 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/USDHM1108230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee36419992e167555710d0f9716344103c5f4d4b3e71aaa089afb09f350a0526. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USDHM1108234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6eafd2e02e6b245354f27313ed385c8d90516d602bf082b30102a298f0bf95. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USDHM1108237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b57a4b7e09fe24a7d446c900e789975b4a1ff4e6ac504650730410ee04d283. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDHM1108238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dce4705943b33d38c19996304eb770d119840c2fd7cb045163e68762c54d83. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:22Z), 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/USDHM1401115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f034c8a89f82fb0ac0adbdb80a7f4058a7bbc3e1b788a0770d694efea6eb6d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USDHM1401118.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c3c6ef89296fde0ca1a630fa42ed345652b4e0cc9e8a1614fd95fa6175cc81. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSJ10800296.