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 0xedf268a9c43ac88d57d48d48ceb1b9655cc38726a5ba4a1dfb2fd6479a54738e. 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/8ca5eac8-fac5-4c2e-b2ad-7ee2b048beb7.json and https://artists.proofprofile.net/proofs/artist/8ca5eac8-fac5-4c2e-b2ad-7ee2b048beb7.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 0xc5d976131cee7514c85ad881325a2fcda886ee24ef203c0e2d30de51c80072dd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMFME2247514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49e352dfb18ea1b47d6d98b3794c6f28c6c68c1733aa26b1dbc0a3bfadbb571. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMHP2012958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe723591cd2cd7a939b91c82bc2546c69654d0e5d02263caac30a9fae7694de33. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:34Z), 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/QMDA72262225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a2ef5ed051750fb5b840836decaed5ff5ffe6159c4617563119dba9ff5d3fc. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:45:55Z), 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/QZKDK2122640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa109d6b495437611711fce518f297da73cbe2056dcf753a7b00c9918948fb80e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ72221855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed030eb2587001a77b562f43898045b56aefb1af1d4f2d3be601142a9366d95f. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USA2P2401382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa598eee1319b503a2137b6c1ddcd410ec3531c667bd4c66d1b20dd58d63c3606. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52455011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0d9f167b617fb0f1d218d1b3291f3f439d165b768d5f3449889142fa5b1b92. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMBZ92588276.