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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b9fc8a3bbdfc601286a56b92a4dec68ba79fc1915b4784a9569e11e41d0469. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e6cdb25-8332-4362-bcbe-98b2f0dca00d.json and https://artists.proofprofile.net/proofs/artist/3e6cdb25-8332-4362-bcbe-98b2f0dca00d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nağmeler Evi (Çocuklar ve Gençler İçin Müzik Kültürü)
Ud İle Hüzzam Saz Semâîsi - Ûdî Nevres Bey
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d111266c97828d1bb503b3ded0f4ea64983f8c1bd6ad54319615e164183dbb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TRAHF1601216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc709c95e6d30bc86c6ebecd879fefea8c5354f9ca0f1ec81c9fcdb2a5a2945e3. 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/TRAHF1601218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635a2f5dcca7aabce6d7a4bb3c5a291c4f49340bd971222a176e122708d17777. 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/TRAHF1601221.
Klâsik Kemençe İle Nihavend Taksim ve Nihavend Şarkı - Sevdim Seni Ey İşvebâz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f4330c45113911f50f25c725cb7fb7331c556c4ad77913cce2dd6a01128585. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), 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/TRAHF1601224.
Osmanlı'dan Günümüze Türk Müziğinde Yenileşme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406d96bec368b3336d239fe957e9ac58265eecc270f4403c1da34b2412b2b460. 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/TR7310800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7086f2245122db869f23151bedd959f90f76f4ca61f5dd51402fff8fa77815d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR7310800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd962ca8d84f6dc438125c3a8e4b486312d2697aed6d85dbf28c493e68150d08. 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/TR7310800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72de0d40731102b682dd9f0334fd8ff023831a3400bd6a90d434d1f713d6aa7f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR7310800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4728b42e9784e80c2ffaf9f061522f1249100a19b78babd8647c962f5ea1f0d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR7310800094.
Ferahfeza Mevlevi Ayini (Evfer / Son Peşrev / Son Yürek Semai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315dbe080039fbac806635b3ecb6d05b10913dc9156618d43ca071c2ca9aca53. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TR7310800089.
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
A Meeting Place: Medieval & Renaissance Music for Lute & Ud