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 0xc468f803c00a1afae07275c25c26f46af6ef12c05b7e292b1a9a606f6fe7e629. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de5adbf3-94ff-4657-b071-64bddc584733.json and https://artists.proofprofile.net/proofs/artist/de5adbf3-94ff-4657-b071-64bddc584733.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Marche Ottomane (Manuscrit Cantemir 209)
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 0xdccc90d485a3a161fc6920d26f530411baa748ea724219b823fb27a59e22560c. 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/QMDA71379903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8576f88b252d046ba1dea6759fb71b022b470d43229e31c698332d20f3cfc84. 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/QMDA71379907.
Küçüksu’da Gördüm seni / Tanburi Mustafa Çavuş (Ottoman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97181a195c33e86ce7c23097b491b7854123bfcec15fac568e4e9f882cda68b7. 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/QMDA71379912.
Selfo (Improvisation à la Clarinette) [Albanie et Grèce]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d2a156540bfab35aa555c5a9d808438c4be4fb1509ee86389ef3b556bad2b. 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/QMDA71379919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c096a73097a088ae3acc348e9fd14c8587954a96f98cb1fc585766f3ebee9. 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/QMDA71379949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40046c53a0a840618e892fa6fb8d7b84c316d84750dd51b5d23817254d6bf495. 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/QMDA71379937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dc02b2a24862a52ac5828f6dc57be620ea37c7416edff2c191b42d18c13dbb. 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/QMDA71379904.
Zapjevata sojka ptika (Ramizem) [Bosnie et Turquie]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e54b80653ede26386109fe8748a367ec8d7282d3dbda96680129d06da1d1ee. 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/QMDA71379916.
Dök Zülfünü meyoana gel / Tanburi Mustafa Çavuş (Ottoman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102dee3a0652d435a168a9495843e18d8f396d9ac500a2a0b301cb0217c364f. 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/QMDA71379925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d650ba553b06d97f2eb05f4c78edc00dcc8afcaacee369e64b18b16a331449f. 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/QMDA71379911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98746b6173ee7948f297be6b150c36fccf5cedc9a445b6f441c5060095a7a74. 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/QMDA71379921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bfe6de4cde04b1f9c17728a70c6fd35232c906e721c5d0bdefcfd266b55428. 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/QMDA71379927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe774b43ff05c46e496f069b4adcf8f95825e0e9859bbc4cedc33cd9a7fb9ab04. 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/QMDA71379931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac45b5f93f1fc954856af637ec880fbdb1c4951b661d0c23c01f1b337476011. 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/QMDA71379942.
Moma e moma rodila (Montagnes Rhodope Bulgarie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc0dfac7a1325e8fecda2207be54ca7c26e031a6a4923ed3c607c07bb1a35a1. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QMDA71379913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe810eda58fae5fb09a92af3097bc896cd5d304be18ce156f1bc2695b7b76c97b. 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/QMDA71379920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb82b0b5286241d3f180fc8e60298cace29660a2d79e255acc6a4ec0d5b8f1b8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMDA71379924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fa685da199b94932cb196c9736ab9fbe7d3a953a52bbcf2a5dfa53045a8d86. 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/QMDA71379948.
Segélj el uram isten (Chanson de Mariage) [Chant Tsigane Hongrie]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612ed012ae15b25eb19240023b5811cfa3b1748d5e6b24b536ec1125a4d2a8fc. 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/QMDA71379918.
Taksim & Gazel / Poème de Fuzuli (Improvisation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4581e40efd41d600f90867fabc9ec4b059cf5b3a38a92058b1bf0daa09d7a2f8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA71379934.