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 0x8bb9946d23a0c9f1ae6d952eee32a177ec586927494f5c022b40c72d9ad65ff4. 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/575b767f-31f0-4506-8d56-0726c582299e.json and https://artists.proofprofile.net/proofs/artist/575b767f-31f0-4506-8d56-0726c582299e.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 0x446d3ac8b3e967d573b1310f140300d77b6676628ba366e2c4aa9abe9799dbbb. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/DEH849700414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3930f4a201910003905ffcab0ed9c442e9cd057d75fe1bc6506b03cc4fbbfc4f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEH849700415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bdec04d33ce73b77de8ccd0afebc2c2935267b964761be4f558e95c7f81f34. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEH849700437.
Zu-Chronicles, Vol. 2 - Like Father, Like Son
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817b300685744e8dfdb717c165468f6fb1cb7af859d04814a5eec581955e2471. 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/USPUS0901512.
Like Father Like Son: Zu Chronicles Vol. 2
Unreleased Chambers (Bklyn Zu Presents Buddha Monk)
C.R.E.A.M. (Cash Rules Everything Around Me)
Enter The Wu-Tang (36 Chambers) [Expanded Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28f88cd9b763d6344adf12e9da9e0a5818c9cebaebb29db28c1fdbd59dd7253. 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/USRC19300133.
Würfelspiel (feat. Buddha Monk & Shabazz the Disciple)
Würfelspiel (feat. Shabazz the Disciple & Buddha Monk)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cac448105dcf99b0b339334d0727c5236514110dbcdc919c3de073010f5e328. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USHM21547787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec6f0fa729647fbcd8455a95311f420e42c500e9d6829425941786765241e8f. 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/CH8081000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3b084fc0118963ea27b1393d19479339ddd521db82dab230cb8a1f25ecd32d. 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/FR6V80842763.