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 0xd21ef4e60b835807b8e4c5f853234e3d41f14222802cd4fa5c3fbbb59d7cc8f3. 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/b4e296e4-b8d4-45b9-b491-0185317173f5.json and https://artists.proofprofile.net/proofs/artist/b4e296e4-b8d4-45b9-b491-0185317173f5.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 0x570abc4614f3bd622b455f3ae6c900ed06469bb898e0e8b34afe8f319fbfe669. 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/JPB602161173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a5c1d127727a8824f7ed880378ddee57ffe284b6fd9a5ef08ebaef81cc717a. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/JPB602168851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d53f99eda2063921e4f4777df2d8858ce5449f2bc8706cd79a7fcac1d87c15. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/JPB602202410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf736ac0f338d3b08879554af4651d447d490a007269ca73387e0ec091ec8d2bd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPB602203028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ecb5979a88662fb0a902b7f430d5f5483a244f2a7484ae87aecafd271f8431. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/JPB602203720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817076ffcdb645b22580369f51b305c989a8e256670d2d83a766b610c52929c2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92N2277986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a84b31c28948838f6d7c743ee5a3373cd0634fe9017773fa48dc4f1045b0e2f. 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/JP92N2332112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58cfcca713dd17960ec6c838259ad4c20e9bf8ac9e791b9346e2ded73689061. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPW2384011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc69add8812f882c8f64a5eebf156f497452632edb7d282cc77cc89d827f3644. 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/TCJPY2348639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc69add8812f882c8f64a5eebf156f497452632edb7d282cc77cc89d827f3644. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPY2348639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369e2648e261b96db49206478ba21e185bc2e212ac34e8a6790cef79cfcb0686. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCJPZ2487970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89553bb31f172c07f7333709bbd81d9b7ab0fc4f1e29b4a1b8b5a0218de6e65a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCJPA2461258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89553bb31f172c07f7333709bbd81d9b7ab0fc4f1e29b4a1b8b5a0218de6e65a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCJPA2461258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c642047e8937d1c0813d69a1e929c210b14ddaa17db05c97576a15891e6f64. 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/TCJPC2426609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2e878484393a38a5033a8b346dc0109071556f891153c6323514f30b3e7656. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPF702500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2e878484393a38a5033a8b346dc0109071556f891153c6323514f30b3e7656. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPF702500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff6f1d9b35412674f2207b0c3f30d447cf7d99127588172295bcc973f94842a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/JPF702500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9332f97c3094a21e636684533ade9bef94a9349b3f65e06257c05a5a79cc8e. 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/JPF702500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d1342fba58166c6da3fafdcb1f444f70e6dcb222e8667fab7760943a853977. 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/JPF702500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd877a74f3f868001541e8e051806f9847fa8982fed61414b1fa6ba3f86abef04. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/JPF702500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd877a74f3f868001541e8e051806f9847fa8982fed61414b1fa6ba3f86abef04. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPF702500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd548e318b20e96f194efa70bb6b68f403d98e8338e7db62ccfa0db1e85f2e2fa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPF702500468.