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 0x34c4a2ef2048181bf95ba1a90b0c1bbfb3031aa2d093625b2da0b44deb2c3a81. 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/336591b4-38b3-487a-80ee-b5297e816f17.json and https://artists.proofprofile.net/proofs/artist/336591b4-38b3-487a-80ee-b5297e816f17.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 0x0c632654fbd0bc3b134d930a517fda4e1e3fe48a24fac5897b0da0633dd75967. 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/SE30H1620616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43465d1c212a066d9f9fd42ec10899093b62ef110fa7683ee0a6c6ba537d8bd5. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DELJ81760068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98db838c1398d8502317f1972bee53e75d0d341d244e296380bcad08db6f216a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DELJ81878348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d22e8b6efcbc5b0348cb5d36cb5f1aad0750608acd9e68c33730f9b5a5b5e0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DELJ82048271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24722f64639891ac5d4aff7ffeeee6b1f586a3496d627c4be54d3dc4e9a6760. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/DEZC62012786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad3f984bdef6920c017d4b61356d92fa59ff89411ad0355dc427aed258ca5b9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZC62012787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658fc671e0be971a41e88cb35fd6b78740274bafc2882426e50dda9923f593f3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DELJ82063006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4750887e96b53a4f56c70f5291225370254db10e397cb24b05d13ff2c298cc82. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEZC62012790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6cde36ccac3be6360efc69d85782a2215f0c269cbb82ffc6186f9888123f62. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEZC62012785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9797609f8e19d1b24d1a21191840b5018f2b7993cd9552690ec90a68c3a9405f. 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/DEZC62255966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e639e00a001b8fbb12436b85f6654e0e47fa54692488af40ebe9e9c233b5038. 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/DEZC62109437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5587847ca34ecaf1c029a5ba62a9f68534ec16ba0a733018af603970f60600f. 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/DEZC62255967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5e7b6a8ebdfc90b537fe4e06c0623c2cf5cd626384429b0dee278f713a853c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEZC62255969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9797609f8e19d1b24d1a21191840b5018f2b7993cd9552690ec90a68c3a9405f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEZC62255966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e71ec3e4d8b8e514b5f4d6b93c04d27944a80a7f1227d0f793052494b6fd490. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEZC62201128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e71ec3e4d8b8e514b5f4d6b93c04d27944a80a7f1227d0f793052494b6fd490. 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/DEZC62201128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39b71d3028e6a6b4cd4b912451df4988092331fd95967079e9e9e1a5d4c4953. 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/DETO32400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33ccd75918e453d47279feecec79594d70820be9dd5a6c6c6fd788c34ea397f. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DETO32400275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e964780470e1506fd245e911daca54836510c919b588a76bfb8b33673e2060. 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/DETO32400276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a73d06335b09664cb441e1a4298a74c1fd654dabdea76ebaf3bf09c75002527. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DETO32400277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b364d524616c47c7bd86977219750c46b9d5d6ed1692a4154ee96cc747532. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DETO32400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5fcd65cf29c0a6ab019f61f0ae8d25cd1d84bea8b2c34928395f161a9a5612. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DETO32400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c0cc4ba3596b50e3a6243a87c715661108d8f8e12fbd5fdf9b8dba7fd613d9. 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/DETO32400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f0c21262c594b83861b6c7cc3e3a15ba842202c1188abc7642e76bd6edf620. 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/DETO32400281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d11397e7064adb0a5f4da09eb45c283b44a1dc23bd744016945b718a61841c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DETO32400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ce6ee40e0088a977c7bc467f039c49bf870b742d4f2f12df6999bc070ff7df. 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/DETO32400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39bd5776693922d0d455356597d4fa519aedbdcdb761ce29f81e94829f55497. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DETO32500170.