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 0xbcc1a0efec0aea54f99f3429c7ad8569a7e8d1bfb6dd07c70a436e7d0d2e7cc1. 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/2031bd22-7a66-48d7-8767-a405948c4bf3.json and https://artists.proofprofile.net/proofs/artist/2031bd22-7a66-48d7-8767-a405948c4bf3.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 0xf3e2814204b8b770d45355a58f4348f8fd45c1186e2dfbebec3e24fb2a33da6d. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/US7VG2229716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff700e139e5bdef59cfeb876c4cd5f98e5d79c01cb809a2efc958a4e52e846e4. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZTVM2206106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e717fc509e011f4ce79b68f3aac762c1b57149871be9d75abdb24ac92b8823d. 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/QZMZ92360867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8ffd819127c59ec3e4ea02d55412e4cf0cce7982b5985f738f470f2e4bf4d1. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZW9L2324208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e08db3339dccb68316c386c10540c343f8b0c08990716e63616bb4ed5b13c44. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZW9L2324185.
Vaquejada É Vaquejada (Ao Vivo no Cachá)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38169a242b6c5450acaff97acd26d261b362575d3629a6242d46a52e1338922. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZW9K2405422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8060d7256817e479244188630840142ea272484f2c9542727f9c563eb52a4e. 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/QZW9K2405408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8ea34e177f2cbc64b279a67103c00b91a23bdff806b776feff518b47cb81ca. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZW9L2486581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38483534bff36b4daebc25a078924e61dc671207f644b9dbbd87e80d2de0f5f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZW9L2486582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4224772cb1a249d2ac65f09032394fad1776cc04a2f259fb249f8d9c35b387. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZW9L2486584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df6263c3be2734d234d195075521b280a09b7db2ad293d8a5bb6e254983b744. 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/QZW9L2486586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6570c918200a6893ef698dc45c0c8e9bb9c8f9bfa20d851220aefe1dad58f137. 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/QZW9L2486587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ed7a7f7515aa60ad1fedd6325d14092d94ee669b515b4be9a576ff27245a2a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZW9L2486589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92914de25035bcdf21d35968f7d185519c876c34faa5a58bef664d8a147fccd8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZW9L2486590.