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 0xaa16f72b3bf69b9e79dcba4e3eb2fd83a03ae277feb8fe9b7e99ce4d3401bc34. 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/483e005f-3876-462f-b953-2e02a7234819.json and https://artists.proofprofile.net/proofs/artist/483e005f-3876-462f-b953-2e02a7234819.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 0xeb8f43c85453b32ab6f3ae94661b0556d571cf7e0e2f0ae51040722db126fbe3. 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/QZES81806667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135fd3e3894bd933029a7f0a5fd317ec3b2f2a2bd42f8f71a6a17d73f849fa93. 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/QZ8LD1965408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe95be0dde932065bb929718086c7918ff64b5aed9abab5fe64715b84e16fd. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:54Z), 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/QZHNB1996434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2e30401b6b7c25a6293e39c681ae5b74f418873470aa356b22c94de224808c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:12Z), 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/QZES71820618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a486568092e3cb4c9333a02113f81c90250e9ec9e755825e0e84d4a59c5488. 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/QZFYX1944956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9988404b97babbdc56595ed6b368ed31d406bcf40b609b5d59ca8c29049569. 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/QZFZ32031318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8762001eac3f93d09aabbba3f5cac22388f8acf754e61b05487cf786b0db18b5. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZK6L2034451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9b39dd455e4a3590ad010795995d8084dd431b207c22baf44ba11a847f8a6d. 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/QZMEP2098051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae1ee9a477d00cc13932952b57493a9b893c7c5a1c083f5b9de57c82851aecd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEQ2036020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03b2ca14171f55aaae725a7890c84793a92ffb38f297e023fd42f2b47cc5ce4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:22:05Z), 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/QZFZ62081024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917a25b3bb9a77356f67eb34f5e9deffd159b870c93d95057860254f90a4a96c. 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/QZFZ72015000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf570961d66261e540af10de29724fb4f65c07e0579d9972a7db5edcd2291bfe2. 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/QZHN52077802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170ad07a345c7e49144f9badf6fc371dc81e208910ccd36c0cb78ae818b01e17. 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/NL4WT2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e4c8937d758f07a72756d4f7fdf2f4c63ed014e78bd67808387d4d09560770. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/NL4WT2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b26489b18db08ec0b9ce45c8892d506a7a553a2e372829b85e36e29ad0a806. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL4WT2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a61c8c98ef69c56e889aaf240abaa2026c2b6b34b162e4bba17c144f541f068. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NL4WT2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9440c68c974156a1fb80fc279d2e82638a55841784fec258253d4407ac1a717. 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/NL4WT2000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a73ef16a89910352b4ef8ae32d0c766a50138a8ca202b0aa14456cc3659c939. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZFZ72275270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82794d674b0c027160276630b6596cd1a1e7c010326f3e2d862216a32caa6189. 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/AUMEV2288685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5654dfba09ee01ea65fe0003604703f17e98eb8d0081bbda2bda30755d3ff1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN52132374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0ab4f96d25e7ea895e5a457ae206f832e0de176b37456ba3851f579754d86e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ52111746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06428b70d3ba94b1074b494d7f6c87f639dd67198b1cfaa05a4ca6e4bb41f418. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6L2033686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf201adac5786c7b627cb4a76cadaa2429f9778b6589aecb4771d0862bc85f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6L2033687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa3306fd3838f01e9c8ff9682f0ed3da3da184e90ec42557f0ab68c44f4b8ea. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZK6L2040223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f1fb43018f62939ecefcca242a2a5a6548f6ba2974224538bedc3bdb0bcb00. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6L2040224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537d19a373b6423efc3c6c5c9acbaa5b99ba0f58e34b269f9efe50da6d2b9c21. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6Q1989876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d045994f63b0f57b78922809c8ee934c227e6f7f6d77dcb3b7f8e32314aabf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6Q1989877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047e529202f61dc62da166727193d09f6826af4f0195d200ceb227886d33acae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL4WT2300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e1831dcf809f87ccc9419a3cf87446216e0f068e44d925de6a639f9a8845b5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL4WT2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce9b37f0cd984e0acd4195b15b15bf17b478b9a1dca4a406acd21de21f26d9. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZK6Q1989878.
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