thumb|right|250px|Zim Ngqawana in 2008. Zim Ngqawana (25 December 1959 – 10 May 2011Matthew Burbidge "Jazz genius Zim Ngqawana dies at 52", Mail & Guardian (Johannesburg), 10 May 2011) was a South Afr
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 0x8aec6cce3c5c225aa059c06410c5f3eb5d1f3b10f6c9626814c93d3e92795703. 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/97a534a1-1989-4321-af02-2799505cc039.json and https://artists.proofprofile.net/proofs/artist/97a534a1-1989-4321-af02-2799505cc039.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x5b08fee8faecc0eaf2e6552a0f31321d5c59293bdf3b4c4d34cecbcf27d6f24b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC039800024 — a six-check JSON result.
Four Part Suite: (Opus #20) Hymn for the War Orphans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336a7c79b137d52bd546bf5ddbd91663beb563928c92cfa076ac24fbca79414b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC039800023 — a six-check JSON result.
Abaphantsi (Ancestory Suite): Ode to Princess Magogo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbeda001bad1647fd6995e17637c307856c95adf4b42d3950f6fb435b12d238. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC030100082 — a six-check JSON result.
Abaphantsi (Ancestory Suite): www.kwantunet.com (a.k.a. African Continent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0328f15d6204a36f1c3f978b6de49a4e2a9249c1e617e2de9fc4431742c8cd5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC030100085 — a six-check JSON result.
Celebrations: Beautiful Love (It's All About Love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafa0deedcbda32604e0bb5414c2d9d1ba2e8fc59811db6fbf6602c9b8eff32b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC030100091 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca4039e424a9da28614d2d430abbb845a6674b33c7f032069f72c41a6a94742. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC030300033 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa972e08466450002a0203e969bb9b43e9d763264833df3def9029680ce1c17. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC030300043 — a six-check JSON result.
Live at the Cape Town International Jazz Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ac9d08d3c90a94a4baac108c4ac76a35f1d221feed02019730848453a1d3fc. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70600330 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a92042223f77aec3f6c180f278bceac600554a3ffbe91827ecf0e4a7c06c3. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70600340 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfab2b69c8c0fd8e12610b3ed329baf2151d2333a6af50682134e9470041758. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70600350 — a six-check JSON result.
Suite élégiaque: V. Regard face à la lumière II – Solo II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f4b738957e1055af178a8cf590d979d5801b0f568c1b457550eda80c35ec5. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70600370 — a six-check JSON result.
Suite élégiaque: VI. Regard face à la lumière III – Solo III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f56cb192e0dcb3c44c898f0483fe712d3ffec8b6df1bcfca968c16c77e1982. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70600380 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10256a45d5441966fe7370b848634c58954c78ef20a44505e8a706b1e36d0a91. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70600390 — a six-check JSON result.
Intlombe Variations: Ebhofolo (This Madness)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9c245b27f94a17e84fade4933ee9d0849f5aaf6facedf2ad7656c261b7223c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAC030100079 — a six-check JSON result.