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 0x3d2bbcb6b2919702c45f0bece6f36844bd916d2bbebc7f0728627306d9f2c2f7. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd5a6d24-049a-46ed-a925-f6fcfd0e7c02.json and https://artists.proofprofile.net/proofs/artist/dd5a6d24-049a-46ed-a925-f6fcfd0e7c02.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 0xf6946a2577c33b956427f408b7a065c0b21b51489c03cf8a4eec02dbfd0f07b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PTBM11700051.
Rancho De Cantadores De Aldeia Nova De São Bento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a6d57a8234d8f028cd5a6dfaca692f1816ddeada54a004cb844c92825018f8. 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/PTUM71600548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505fa18219ce8ed6ee3edb4e8d852a2b2956dbc173e2043b34c3382890a1a8de. 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/PTUM71800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7014e4c182d0a30736792d5bd5375b8cb35a992671ccc6b7ba350d332bdd74. 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/PTUM71800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb7adbcb130138b4f672d8b94d200d1fecdf6e6f84288b9d423f3a1cad8edca. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/PTUM71800306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416cc57761a3ff7ad023dd29773d676d3259b107b039cbd1bf229c997b085d93. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/PTUM71800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e707e3624fe7bb827cabdacf2578ceba6a58592c19df53b6c4f158c404e298. 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/PTUM71800309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bed205d3cdeaadfed2f5b88788ab35a55064a0cad5eb4ad6baf341d03d1db5. 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/PTUM71800310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1579efd7d7315f62ee5beb4d523832c3e120ac15583e2d636b6cb4d17cb1672b. 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/PTUM71800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98ad94b8215d3b1c762fb210fb6dedf33bd390f508f9707bf914c1ba46ebd54. 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/PTUM71800312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb518997ddc9795239a3c12b395b9a742fad5bc783505e19414624801fa314690. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PTUM71800315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7086220d47b6e4709235c27ddbb55add42edf2aa6e97e5c8460cf2d9e2c26a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PTUM71800317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e84dedb047e49be83009e39b6393b5024122471cef8a733a8067eab7155b25f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2429006.