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 0xbe3cd0e9a321627de96fd5e520f773bb82e75b506b9b97350f87908d8efa8b07. 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/e42677ed-8f45-4870-88d5-44314a3891a9.json and https://artists.proofprofile.net/proofs/artist/e42677ed-8f45-4870-88d5-44314a3891a9.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 0xf7beb92b0918b56efdab28dc2b9669dee2160304ff2fdb1ef7daf03dfe4a43e4. 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/TCAEH1925647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ba3d4bfb657d2b658de49ca415825d4d0e26b68a9c7a33915e3c2279523205. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAFO2143064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fee564a29b5714963f17b3bc1027490c527d82324a7e66662c4c35c10ab3c9f. 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/TCAEM1948016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583c56fb3202340d713ec10c8ab70c4bc04a5fdf5b63add9d7f7465f3724e313. 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/TCAEP2045023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282824a3df9ec43ed7bad31662a399902050ff1451cd8c6ade0100cc7b329647. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAES2034634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3396b42dd47a13f5acb41e7b1108c0b1eae6d9cf65355a60b677475a99acb92. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/TCAES2083220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc080f4245c5942dc2a6e3b15b3a23c984961363b84ccb7debd4e2d70981e324d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFG2079434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1711fd260ec6623c6f1d8c44d4ce7352a54ffd01dff90d718277227b952b56d6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFH2024576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7312a55fea06534d78aa42f306c163ad4527018ad62b54df0872439129fdcbc2. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAFH2024606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bbb6b75c7d166b83ad715ee499f8f4979db528d31cc6a320ef7ecca7f6803c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFT2123315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5250511f985d74e2c1dec45918cf9a4917de38c365013bff6ca183edbe0248ff. 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/TCAFW2144227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf924c9972f8725c3043d957b0eac08b95ece00b1eb72936fd7240ff906a1e4a. 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/TCAFX2163223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2208c0bbbd48d69343bb8a818aa3166e2fc5f7b71ba5c100c159364e1353e52. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAFX2105240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39918b2b1f2f8ef7812a7568574b86193f7d5c026793eee9f6d8e25d9f1f4e70. 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/TCAFX2105265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bbb6b75c7d166b83ad715ee499f8f4979db528d31cc6a320ef7ecca7f6803c. 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/TCAFT2123315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8449bf8fae99afb40b570d806739a6d752c8fc181a462a6702f668083d00c091. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAFX2105394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a8a03389c55803dd6f362479018b608f340259089c31b6ba818b85b1a4abe. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAFX2105529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3437d7ac5130bf895318a2e4aea80a04c1bfc281b8a311539cef8fabf8c3fece. 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/TCAFX2105578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327036cca71ce10c508fbced462b04de5ca98b5589104aed6aeda38139a9c4df. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAGD2296336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002415f597115e9ec66b6fc87667fa95ea855ccdef56b5bda3517f532f29b108. 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/TCAGD2296349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c2253d875a4ed8c40df215c8e84210efdd8a22b6a2a3d5b0f09c98eb598707. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAGD2296371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6145053cde9b46cc6a91dcce85dd7ffbf338c381868fe667b5b77b55c9cc5669. 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/TCAGD2296383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0880d0a99a6f047b83238065990b388c47565004d7c01539d5f1a0dc7f8b75b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAGD2296394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65da7a412d5623549a2fd2d14693876511ff28ef615941d2463235f8cfefd11c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWW2355878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52c91b6139909026bcb4cea9d9acba730f390299529a3f2886c8b871b89afd6. 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/QZRP52302289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9fb485aa05a8dbf26e5b46f5f6bf49630c7562619ff72317681e6aa4d15b09. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZZ7R2466580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae59f133438d0fcf4228b5a9a2cc6eaa9de3d26345da36332b9a0434340fba36. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZZ7R2466581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd800f86c3265730d8d84a7d563f360cc87e836865c53d53ca522bbd4d6984524. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZZ7R2466582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc99fe7c3fb8287bf82758e64c4e5e9d08bed656126764873b62f5a7e26d8778. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZZ7R2466585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccd97f8bd859ddb633aa865e18d5cff7d8e5a802066c8048f2916af5ac61966. 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/QZZ7R2466586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3551e3b3411242a9b6dd7f30a20baa2db9a745dfbd1e563e6be548b062f94a1c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7R2466587.