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 0x183ab4521c8b2259f46b7d6090d58b58963f6a0382a95943a62e45d8741e027f. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0b9a178-98af-4580-ae15-408addfc581c.json and https://artists.proofprofile.net/proofs/artist/f0b9a178-98af-4580-ae15-408addfc581c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
30. Akbank Caz Festivali: Dün, Bugün, Yarin
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 0x7bdec5bd7ee0e4305615fd2d3bf02493d08b2b526289a2fcba329bbe4efcb396. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TR8472100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9244bf4dc82d3d54d19f6df8ea5ff4f8f6240d2a01e8d79ff5a67c50bd2dec. 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/TR8472100032.
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 0x6e651414d8dee704c90acd192c00d7377ce56069f8f4dc71bac3ea9e70e311c6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TR8472100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf3e958ee91ba8d85841abbfd10035fa7cde59e7bce37ef5d3fd65b7414433a. 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/TR8472100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2ffdbebfb74a5c740c3bfd5e74031e4bde116bd11b1691828b0ecbf25ab4aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR1231602206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da45deea56a7a0309873d186449aa317ae43d12507326bf5e6c8dad3e160e06. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/TR1231602202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff97a13cd41f8fdaafcb8c029d21f25b096b3238db2adac46a4376650954d36. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TR1231602203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d32ac9add9e71364536fb56cf38baa4585bb05176354759d27252c92aed0cf5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TR1231602205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefafcb159f45bda117693d11e382f1716c3481a07d05f382081e9c70064a6891. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TR1231602207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470f335d679dab72d1a9b411cc54ce51c25d88d4122b4bd82c504e5a876186bd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TW2470266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7697f51a568e1b25a127af67dd914c92f40f0e8e94986d4d0d57f54e3dc994. 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/QM4TW2470268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345697673551f428b7e1cf49568d786a990c808ff5806834ee9d07df4f174d0e. 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/QM4TW2470267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6407910ef9e05bd6cf5571e65a154ed3925c4da5c2a2d80873f5cf5b2919940e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM4TW2470269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82442a376219cf2960f256bb56f1f65d07c0a90c3dafc5965916b1f316930158. 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/QM4TW2470271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0187066885cfe415dfe6cea8676d079d348c644a45d1063f6502949148babd81. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM4TW2470272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf43bae85c7d15745f3cfa3631fe33d64e013801e2c083370792bb65bbb2c00. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TW2470273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf8b5b14c0145e9141ccf7d6838b82998dc9ef446b7892027c8320f1c4226c4. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:21:14Z), 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/TR1232400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e663ac4306d0081b07c420cd084fca7d18992837b74c7ed015f00f851ed2333. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TR1232400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c574af958d1da031a2717bb20515bf798e27db1f481d1b8b32a0fb53e5e3f2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR1232400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f04fc2a453247be3a13cc3ba62d41afdb458c01235217d9caf8bac7f0f1d7c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:15Z), 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/TR1232400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb1996ab86cb15696528c3cc12ecd5eb8d0ac4ca911569f767e42cfc1ab3b29. 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/TR1231701301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f2d1db3688763c750cb4748cecdc2f09bb03b7e7350a716edcad1a52a98628. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TR1231701302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5736dfb1adda4851d44f3bd9ddaf74f1aa70b76d46254284012590d990946d. 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/TR1231701304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b3b676b3b1c2f4212791886e20184655b6b18fc688cfc41c2e28ed9fa614c4. 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/TR1231701305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87b1493529b3d812e06f03fe9f1884d3e45fee8b87ac3cbafdcb3d31fe9a04b. 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/TR1231701303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b060bb24f69d5f7f41bcba7d9e167074d14250840f92f4bb0af3f48feecbabc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TR1231701307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0aa3caa4d53945ab1582f27a1b7f80c6610c613e523bf31c37ddcb65a91f25. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92034783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c9b486b4badf29249477d1ac3b5343141efa9d0c128878f492b73a49ad3c91. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ92034784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccbbe1cfe555cecb9a36937b68befb4ba57537576d5cf6d1164de6a007b09e3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ92034787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674286a045c64391f891ff85fa89d2dadab4700454a230ae6b9742ab035d5693. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92034789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac04df0d7eb5cdde252501c5e5b0e8196583c1bab8f7bada1fb58a8cd4788e. 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/QMBZ92034798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3221068cfb4b1be472fdd16f381f4a993b102a66f62f45724b9dc711c79dab10. 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/QMBZ92034812.