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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd8ef51588ef621a9cfb31d2b204809370a78f7b080efd62c06d561fe6dbf8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ace4f596-e040-4d5d-897b-9a237ff1e7d7.json and https://artists.proofprofile.net/proofs/artist/ace4f596-e040-4d5d-897b-9a237ff1e7d7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6488b6afdca88fe4f96785c33bdc7c714d1c3ced461fc1c4b74ff432e45994e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:37Z), 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/SE49U2329802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeabab9f9f46102516d29acda585cda0a98683f68cdd792da8a5834d59de2c4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE49U2330901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2b1fe65cd28436ceebc026b1bd3a8aeec0314c137514cb146b2ef064104c31. 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/SE49U2330902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf703d070f8b02d36fda370c86c5a55724288b55712f5aa0cdfad8870a9b06db. 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/SE49U2331401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c96333e8a923c76177d40323aa8f400fc8787a80d5a4b271834bbeede6841b. 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/SE49U2335301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d0fe28d43165a17923134eb7f26ce7d0a2a90bcf8acadb19bfa7999d464054. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:52:13Z), 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/SE49U2337002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425a4eaefa1acedf5e898477bd33dff122e2a05c012c76282732fcff08f28dd1. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/SE49U2446703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ee6905e4be7f533ebc761dc162c2af3baf498e8c5520e08087b3397d7e603b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE49U2454901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08b94b2dcd2595d221b1c3a14d172d484ff5a75441bf68de5a3dbb820928ec4. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/SE49U2454902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd403f85ea16a42fd0f115db8720d3b508076a8e96aba2f7f4c572813a8038fe. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:55Z), 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/SE49U2454904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cdf85aeec530cf322ea4dd1c85694528ec02ac9a22fb87f0a6943156dc1e1b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE49U2454602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fbabdd9e304229c6c223e79827c2ca70cb275fc92656c0bebc07361ab1d0d0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SE49U2454603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76e5b7e4209fc2eb70e3b2c6480b03d85a722c7778020828da15a66f907bb7b. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/SE49U2454704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72517ae086b7ede1787ef5293ad2bf97aeec884b9111d3ba0f4a587971a13e8. 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/SE49U2457302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da14e3e5277191d809e90528852589b64ddfaa55c45a205b200a2540111caf4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE49U2457304.