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 0xe22c2196fa4dd388d8bb10540590ef916820bd85ea1420404585cafcc472d19d. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01a29740-6ee4-43da-8a03-eb6db6c9ddc1.json and https://artists.proofprofile.net/proofs/artist/01a29740-6ee4-43da-8a03-eb6db6c9ddc1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce05055d8dc77d214f2b30c1dca6937362eeb44f2655ac7606807357bd69ee6d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TR1231900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89521103712dffa367f45a396f416f655a5074b7178bf68cedb37fd00882e87d. 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/TR1231900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec5de12716ad3a9f230c9a69f7056cfd1b805e8d0162c449405cb7745a7931. 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/TR1231900404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfd4479a96e03b76a82c434d25dcd5e36f4140df9e22b6fa74d1cda086a4861. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1231900405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732837272ddf4ae166350a946fff717899228ba3c842b97504cf4947b690cc02. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TR1231900401.
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 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 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 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 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 0xacf6ef3fa598b147f966bf85a7d92afd395cbf65ce4020e2d03da4e9352ffe9d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR1231400604.
30. Akbank Caz Festivali: Dün, Bugün, Yarin
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a5a2b9b2514a5499ab5f558fa42e2d669d978f4a765317645d340f46b3961c. 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/TR1232200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abc120d42f27bc8c18f01ab72b3ce2f2ed0e3e01fd88f21927a7560ef49171b. 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/TR1232200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3b5a23dd4287f0e161de203f7e03bb9ee935e3bd3ee9ce3594dd643ad01866. 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/TR1232200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5413f8b8833b4b344fc8b9db035b5395e99efd588dfd30c64254da392fa15ad6. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TR1232200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6427f2e25a7f04558973273260576cb3db0ea18651ec567d83ce48052c31f8a7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1232200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5778aa6ddfb354a372d49070d58eada1879a49e54c7f6a5645209c06a85682fb. 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/TR1232200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0e053cd0c115e62404d8aba673a9e6133ff8b234858ff10980f06ce5625036. 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/TR1231801611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f50bb4242cd921d333b852033ca00f30bfa452619f5525ca5a16935ae8af118. 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/QM7281894230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f38f216a81face621f60805a1ba0a6f65f8706fd3f97820c2f86d73a3c4c42. 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/QM7281894237.