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 0xd6af9c060bd7ac2dc5568ef6f0595505c56a8e1ee44e8b5b599fd445f962581e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1e3c587-58b7-4c47-9af7-57d236d2fdea.json and https://artists.proofprofile.net/proofs/artist/c1e3c587-58b7-4c47-9af7-57d236d2fdea.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 0x124a9f967419f60ced9aba05a8699f97a01bab4dd0e58142f14644c121a8b2d4. 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/TR0331007745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c01696014c68848426488d56eb83d0c694e1b56bf27e589f1cf820d4d67d2b. 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/TR0331007746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6072b1b12cca535d498f2d96d33065e951a811036d673b57339cc90f00ce99. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TR0331007750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98924992aec566de94cb61bf5ede4a8995cebb12e501caf5d3958a8ae24eba9. 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/TR0331007754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c0df1e7b7fe93aa6a7e7596984a118b8b85f188def03a8ae6cf11e54821e09. 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/TR0331007752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9400b0a90dd654f2398443e80bfc601385ce04d151c12d32cc6a83b4fc1293. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TR0331007755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0668a2dc182523a4bfd5a09c9f5bff6b4d77820e6f7c3e7f871bddf74643fa6e. 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/TR0331007757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d335fc14c5b898e6a0560eb1ce10649eee4109f9a644ddf50f668ba5f558b3. 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/TR0331007758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1dfd5ab96c948ec816e4eabcda5697bb529fb16e06eb86eb921f7dc7c34a82. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TR0331007751.
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 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/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 957240 (2026-07-09T00:47:38Z), 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/TRAHF1601224.
Türk Müziği Klasikleri Enstrümantal (Bir Sevdadır Şarkılar)
Beni Ateşlere Salan - O Kapkara Siyah Gözler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06b94417cb1df4c52e7e19896e1d8d0fb0545b3243dc2044a82610fb9ee299a. 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/TR0141925414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd629cad942deb8aae8df9be2bc57f0434f0472da92cb64c67cd19bb3707ee7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TR0141925405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a94a9d5d48bce4498b346c1daeba78f48982f65391275d7b85c79b7c3b1fefb. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCKG2000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28026635a3270fda69c9e44641f633500f91d8c0290ff6b9582d951593c04feb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBCKG2000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18f4b0a2f323c4d3212693a12d2383567e07859abcce94e2608713c19fc6789. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBCKG2000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09d1adb0f2e2e6caa75ddedc0012ecfc5a4cd8240575c8fa89c295f460bf4d4. 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/GBCKG2000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd378106dd9f973efdbe57acc08961aeb91b06e208ef78a362939cfbc51423f28. 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/GBCKG2000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11bd429634a1d5ff6564f37b9b12467878f27bca3b5fb69efa5784803274a0. 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/GBCKG2000196.
Taksim - Improvisations on Traditional Turkish Modes
Klasik Kemençe Taksimleri (Osmanlıdan Günümüze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e149d21b92ebe5a80beec8b200ed8ba7c3383c2362ca8db0c6efa92dda97673. 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/TR0330604178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84422fe4dc56bc68efe79c3247d737a3dc9ae1d07e0a76a7788abe6dbe081be5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0330604177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024388cc4e62272bc6368f2c63265e853bb3efae1df2cf7745a12a1d7b5226d4. 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/TR3340602058.
Türk Musiki'sinin Unutulmayan Bestecileri, Vol. 11 - Dede Efendi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6df20d787405f32fb4acca03ad9dc177733ca6f8094b9aeb1e3f911f74be54. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/TR0040500421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e602350385618580ecd1f9543962f206b0fbeebdcfd753dfe6cf692cab5dc3. 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/TR0040500425.
Türk Musiki'sinin Unutulmayan Bestecileri, Vol. 6 - Şevki Bey
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65b325ff255c8e0faed5edd19cbf7d975ee3d8cf9f26f894a49bf8a082bea5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TR0040500345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaae2ed066e0aa007b387cc9358df3367761e69b701fe88e582367e5c8b5f32. 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/TR0040500358.
Türk Musiki'sinin Unutulmayan Bestecileri, Vol. 5, Vol. 5 - Cevdet Çağla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0262239b643b7b76c6c3898e07ad78b5356825c397d4ac4ad68bfbc5352cb1d0. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TR0040500334.
Türk Musiki'sinin Unutulmayan Bestecileri, Vol. 7 - Hacı Ârif Bey
Türk Sanat Müziğinde Unutulmayan Besteciler - Şerif İçli