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 0xec5a01fb5d2a1d8553998aad17ca12ac2458883a3535489bcb8bb9ac81f05ff5. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf0a2e4c-b851-4fd4-958e-02e82d127c96.json and https://artists.proofprofile.net/proofs/artist/bf0a2e4c-b851-4fd4-958e-02e82d127c96.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 0x6e70472c0efafbfc5147f0d22785179d069c151fb1e6c29be1fc0345cec81c0d. 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/QZMZ92539483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baeb140660888a075af79ad1c8dee293e6c373bd16e8131d08896a0b72c7476. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMZ92539484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea78af2ebf8f54fb9e07dbbb0b235fa2ad2005282fc8a69f04e4b2c3404a8460. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMZ92539485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471973e15161874e9a270fea1a0a36f4d4e3205b6799b1a932f755b130ffe8ca. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMZ92539486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1000cbd142ca534d87f13ba7d347d4f306783bbfa05be20cfa79862855d12f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZMZ92539488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68235d7318f85d6f15e280e032c1dcc6bdb175ffb3ad692bb3fbcf4ce964e28e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMZ92539490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d55eb4c11d27a73b25fa2ab7a929d930c2c47a0b2fad9a348b61e9a19b9493. 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/QZMZ92539491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fffed5067150b8704144378dbc2ec1e8c991f3487e3478243eaa84d8ba1e47d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMZ92539492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49d439a577ac9936e96674e95c4626b9482a78cd0bd4f034d6e1c46bc6fc915. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZMZ92539493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e3caf5d31e33e15631d18af79ea26bb765885046a0eb2e9b94a187e9941fed. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMZ92539494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe4cfc405aef43a5292f2ed1f0a13b6c4ce4e59d7b5457c40250eca363af0e6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZMZ92539495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb35a93229691dd88bf62cc29043f201698c1bd75ce7c1b8eedb61b6330082b0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZMZ92539496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa48b39feb43ba628104cc9b03ce664dc7c528c03e4598d39ecae05e6c5cdbc6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:30Z), 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/QZMZ92539497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00255d747e2b315eb058fa9b52d259552408d5dc6b68a8df6a8dbd77e61b172a. 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/QZMZ92539498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c17293d69836de00dda78bb3a61bdf031df70e9f05e22a0a34cdfaf87033991. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMZ92539500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503a3e18744ed49068ca94114153dbb16e2cfe12c5e19f0b46289a644f34f362. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMZ92539501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0d36ece72e58b5bb0ef532a061588c0a2f9c548afc1bbdaa8484f6a159656e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMZ92539502.