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 0xedf6682c2cc22672e9323bea7b4534d4eaf6bb8c8d29d7f83c09401a923614b2. 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/9ef53e38-2b31-407c-bfab-c4a6b3d4ff99.json and https://artists.proofprofile.net/proofs/artist/9ef53e38-2b31-407c-bfab-c4a6b3d4ff99.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 0x1d8f5321adc1fec878d239442b23fbda57a9789ae3dac5c2a8a575d5dcffd313. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32003571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496b69f872951bfe7b1c9d1057107181233987c636e109990c8cc7fecb032cdb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN32268256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe75ea56cdbd029a48dc45c071ca9660c3ae6dda78a9336460adf99f76b1b9d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB32209281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc433ffec63fbcf097a9aae437447d7e38bbece49919288592a5c4ee9c4768578. 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/QZTB32209285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ce71ecaab36366a108b8e6eec6dcc24d4ee0323edc1f00896669cabeed01c7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:29:27Z), 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/QZES52386665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea5ed5dbdea5900bf15c86f74c00c390d505f11296468fc605fe7f6bf668f83. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:24:05Z), 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/QZNWY2354887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd150ac016f502266a6481d1b11e9798fc633ec96a79914dfd4a0007279731f55. 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/QZWFE2326063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8dbe02005c4b5fec354511ffce97c1a9d6400700950a39c0e34fbd058fd83c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QT3EZ2480149.