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 0x11414f81badf0608beecd946e20f4351450abc08e729f18b8c36d5e0f0972b69. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a047a44-ce37-4087-809d-867229ff3921.json and https://artists.proofprofile.net/proofs/artist/1a047a44-ce37-4087-809d-867229ff3921.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 0x28a5cfa787f75c7862e847caa2065980ad328d50ba9acb63d7eae0acd60b6831. 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/QZHN32385643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6818a80238a7db97bedcf9783c69166ce0568e5e9832af6382703ae99440b84e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ32204712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9bb4a6a6cdd7db958bc5791a93e78af4004b9fdad10122672a68aba802c766. 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/QZFZ32204713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d345e6646e4e7bcbea26e1992b123220231a1d930e0e8402acfdbeaf91040. 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/QZFZ32204714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98407ccfb6248c85a84e535be45aee0e985b17fe9f9bec8167f806c6aa7ccdb4. 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/QZFZ32204715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5892d78312fa824d695b3e166f8b75118a08c592d274c2accc875f2ccf99cd3a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ32204716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea81a18e7c47f4ffa0b241a07377bf7c8945bb6115c2a92d71a449f58d09077. 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/QZFZ32204717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0aa3592c7d89146bb87847e66e968e87dfa43713c4d0379bc6c06d5bac262. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ32204718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45826501ca5f2d8b5274db5adf8de10f816949ab518beba32b83ea7336c0a174. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ32204719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e764aff0a142fe903a23110fc900ef7d97d993c60a808bdeda71e843080eb4a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6K2092100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe575df738f0c7256692fcda6e388d19af338fe6e8ad0e45ef018b8d8c145e89b. 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/QZFZ32204721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9ef95af4fa698063c231e4c22fa60202a500d70a512d93deea9a0c5984ed3f. 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/QZFZ32204722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47f0b362070453be4bbc19187ebd5d8ddb3bf15183636af88640720eeac949b. 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/QZFZ32204723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57852ebef6fadb1811b78155c910a6344d88e39e9560684eef194999871d25b2. 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/USCGJ1895938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1fc36c55d65ea6e6a81452973b363287b738f6effb750efc168cb0e9306bc8. 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/NGA351700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b17427b2f3391ee3ba613e3a90609d33798be8f9b3b66d31a9fe3c695a3a41. 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/QZS7J2349778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f02ea396aed49ae7ee4fddd8713779ac02653233d46fdd6567baf5ea5150013. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2287441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df3a5139bb93ac1f0a05b14fac5f0502fcb3574a288ffaec0fa994f6b5eb7a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHN52348224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27265821fa065a849ed2419da2372025c4ca0789427885b90c228e9b99adf43e. 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/QZZ792422854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64501a3c2242f9d4b1f53a5a7649df0a7593fb9da37f02e1354691322b53d1d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFN2423386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6334929bb01b88fac98426a75ef50b8d4cd0b4e539f0586e70658491ce9c3186. 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/QZZ792422855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaf7384ec66085392002d35d752649271c0eea97c9b928cd0313fc1cfa2941a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNB2337903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6d363e12cc157376b3bc3ddd982bea291fe41aa0e5f20e68cdb2cb70282f1f. 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/QZTBD2418639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3985cd994a953800c1639123579749365c282fd73403d285fa80f1b5b1d06a. 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/QZTB42497919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d5ed40d68a1a905460797c294cb2dc524384bfca176752d61bdc057a77f233. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ792422856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9184dd5827ac49337f639114ca23874b8ba8a58b7745625059988f5196a36d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNB2336269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403a77bfd6e97bc9f27673ae5ede93a0c433420bb0bc3e67f3d079e7152e49ad. 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/QZFZ32339698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6d363e12cc157376b3bc3ddd982bea291fe41aa0e5f20e68cdb2cb70282f1f. 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/QZTBD2418639.