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 0xf5b9fc8a3bbdfc601286a56b92a4dec68ba79fc1915b4784a9569e11e41d0469. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). 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).
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 0x0d1dea9cadd37d39ae790f589e6f2870b77fafa5aec17f1dc24b4d275922f2be. 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/TR0331007763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d86652b569db12c26d521089e8a89a47e40432d9650fe1cfc496c3e110fa6cf. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0331007776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f3d9265c0397b69f7d0bfb3288fb8a439ddab1c382c11d736b476ea77410ef. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TR0331007769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d931dc99678db7365c3a838f2060445d2f869b730f8e05cfdaba62232a506af. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TR0331007768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523956d5aa4e538419a7e645db415fee0a1b7d5dab96c73a8c9b0781f2315bb6. 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/TR0331007773.
Nağmeler Evi (Çocuklar ve Gençler İçin Müzik Kültürü)
Ud İle Hüzzam Saz Semâîsi - Ûdî Nevres Bey
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 0x0557081518a0b0299432766ba76cc32dd3d2cb04d10bec63e8340270f43d91bd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TR0330806959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212e94774d11ce5ea98abb9ffe0b3829ac43a661aab4da97a19f43fbe38ef988. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TR7310800117.
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 0x967a59ec9517482549f615a51553072b9ea7ba1c855dbe07eeb973b7fda3db49. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TR7310800086.
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 0x1a234fa7ae25e2a0788ecf03897c6cb508e11952275ab26f76eb9f0361d66812. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TR7310800088.
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.
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 0xdc40c998365e034129b886e901ecb5e8ac8ae07aaa3c61353abc8c2532d6c412. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TR7310800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06ee57309206e10ba9cbf59a02b66bc14272c8e29de8ba8c4390a3a03a19b30. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TR7310800093.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4a3193d8868fc79da4d7aa7201c3b2b918481ae2533572497e6dd2ae32784b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TR0330640544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29678e4d02bfef539fcf571867f5ce74f433ca165c830ae72854928aea877e15. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TR0330640692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a805874c204a405f2fe662716c0a95f8791dd70f4dcdbc228e17e1c083ad8bb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TR0330640625.
A Meeting Place: Medieval & Renaissance Music for Lute & Ud