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 0x7cca3e30f203cf4aa933a8ab961c12a490783c9dade3f475e9a8f1f90cefb081. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3acf7b27-4a90-470c-b439-c80ee7180bdb.json and https://artists.proofprofile.net/proofs/artist/3acf7b27-4a90-470c-b439-c80ee7180bdb.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 0x54fb5f5e2793a45b75a32ea240a3060102433b5ebd0a52d0495e04dcdb2b518d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/RUA1H1819738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c56a5f6ac07b033f61b408cc41f054a8e498cc264228330f247c73b69c31d55. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/RUA1H1819744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500ec410f795ee740042f4d4e9e0d49529e86902bcd5aff7ef408a05cd74c1da. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USL4Q1989435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139e2aad73e6984f91c77d87183e620a1c4ec5ceda0085867b479ee6f4453b94. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4Q1989436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0590c620b4701eb5bcd01c6ea6f09e6b17570e8c76d6d1651e5b026c494e3087. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USL4Q1989439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c778af697359feab6cda432622bb0ce8336eefed050014592229abd77c68814. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:43Z), 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/USL4R2025799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17cfef8b09dfe9d394d6ae5f2e51ebee7a4a42bb4123d68d32f52d4b893aec2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4R2025800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4785f5b4cc825aeda67dea1c92463436714ac514ae911e6ce4db79311dcfb09d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:02Z), 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/USL4R2025805.