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 0x2e4ca431fd9191c2b11536015cc189eef2bb35bfe9e159dcca03d2ab99d8a1cd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/725a2c6b-73bd-4efc-a0e2-cfe1d5072eee.json and https://artists.proofprofile.net/proofs/artist/725a2c6b-73bd-4efc-a0e2-cfe1d5072eee.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 0x3a99a997ceb863a67ecc71564f163e5c4377320cfbd333a7e61bc68098f39714. 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/NOEHX2407010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424bdbcd60980d2630b83dd6ac063e5dddbffa933c05f1c6c17cc9210a9bd9c9. 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/NOEHX2407090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c8239bfe18153cca1782a8132002efb46e8574da81f425de2e1b24708ca433. 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/NOEHX2407110.
Four Pieces from a Distance: No. 1, Prelude/Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67651e9cb4487697d4ca85383415070861e34de8606b81b8c3f0920afdcdfd54. 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/NOEHX2407120.
Four Pieces from a Distance: No. 3, Toccata/Chasma Magnum Firmatum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0012766b39217cfe87888ad88177565f69e0ad0bba8244c39f51b6c53edc9aba. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/NOEHX2407140.
Four Pieces from a Distance: No. 4, Children of the Heavenly Father/Amen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3660a936461d611ccb5f0a18560a5933b0a0cb466ce7dcfd6d6fed7822f9d4c. 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/NOCJB1204120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf594196c369ed6dd22dae853aa56f519f8826039716a709d1a30611459865085. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NOCJB1204130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0eb34203bad371d20129ea729058281791ef2d9cc17791b30d411fbb9fe40c. 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/NOCJB1204140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3086cfe579778a3182af098d58ff8ec58f7e31b7bbbfc5e205fa8ed081a3d3. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NOCJB1204160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeae7a9dce386a0800feb1e112a5b544f35c04b79bcdbd47cdbe63f8e22d7de1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NOCJB1204180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd814b3312bb5ec7cdc3238046afb11a853b93b4fc0f577f1555f862fff05e2a7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/NOMPP1904010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284c185bb4849e32315d17938d049e84914db15838d2a80d6ccf8da25a32e342. 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/NOMPP1904020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb85b97d4a5cf2893adf25fc13f5b00ec73e00d45d1a786b4eee4656200e1160. 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/NOMPP1904030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc3b2759e096c486dd1b4aeddbc8e4ae51d7ff9571d15c597ca22c6752f1b76. 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/NOMPP1904050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d22311d725cbdd417021d4f7ac566b3d2163d586bad7066d56c23aa77c4e05. 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/NOMPP1904090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2792ad1da3744ae76abea2335cea61310320533bc1bce3d7627744a8e2e739c5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NOMPP1904100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e51614c032a833f48f4348fd9988e6a3620ae8ba8f188195e862949beb9c35b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NOMPP1904120.
Six Orphic Amulets for vocal sextet and saxophone quartet: No. 5, Golden plate of Thurii 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca97861a1b03cb62147b650abb0d7c20466780c54f8b4573455ec50ea89f1b60. 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/NOMPP1102080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d847e13ed6a8ebc3f10728d1659f9eb33d47b41c198e17210592eb6bc16e6. 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/NOMPP1102100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecf598ceeefccde2e6374e9b5db74e602a4821628cf411f07d7188287d52244. 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/NOMPP1102120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00da8c7d84960b8be4a48c76be05f4174b106e10d853666162eb10a9269c68b. 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/NOMPP1605020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4565877cefe33409d5e70537d1c232dab813f46107c83dfd6e69191a203f497c. 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/NOMPP1605030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0976e9f9f40b5e88982e5baecdbaf9e1081b083bba54894711ec9f226c229af1. 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/NOMPP1605070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751f293936aa2ccf055bbb61e4deb2d175eb98e47459e2662436180c4bcc9518. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOMPP1605120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfb2d120a51fe0c8a1671c871a6dbbc838c1dee8b33f345118bebfcdb34f6d5. 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/NOMPP1605150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2884e6707f62955b3a311f5acca185f6e4e96950ad834c5c38b2b2e435f257. 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/NOMPP1605170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf243f498d52bfa01050835dcde5624654ed09e2b5429fbe2444cf96f7f5d6b2b. 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/NOMPP1605151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea48af914ef60752ba3ce8c7fe39e39995cea52810bf816d92270a44dd4e4ac. 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/NOCJB1901015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c625a419d89a24e19c3f429a6d29399fb476132e52316d11952cbd8e45e2db. 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/FRP811700450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b73ce2fe4d99d0d90f00715bdd7e7c6d81b88815c74570c511aad1fcf02391a. 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/NO5292001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ebe6a55856f41c8c2bf4fff70d3161ebf75291f260fe0df8fcd8e7173d1824. 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/FRZ092200097.
Nm Janitsjar 2022 - Elitedivisjon (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8283049c3c92b4461406181ec76b647eedc945930b59d286f501c3472818fb2c. 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/NOCJB2200104.