thumb|Eivind Aarset at Moers Festival, Germany, 2006 Eivind Aarset (born 23 March 1961) is a Norwegian guitarist and composer. His style has been associated with nu jazz and electronic music, and ofte
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 0x3d10e4e8862fca8cd670c2e35cdaa7b0671d3fc4145a048e79cc4bf29b6fbde4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72838a01-5b7d-4342-ae20-88c0b71fff3a.json and https://artists.proofprofile.net/proofs/artist/72838a01-5b7d-4342-ae20-88c0b71fff3a.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 0x7ada48a2646e9e82e09baa5823bf2a8a31d32944ee89491c47a8e4b455310da7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME2429041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809645c501b069273bb150f409ac28207cd1fe64013dbacd821b3d10ac7623cd. 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/QMFME2429042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efe3d9da9131cb108b7d3431a2ef31c135931afc5d961a2a3a61abddd853b29. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QMFME2429044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e80407e5719104797d695b006e1cb3d4a38d30ba3df68faf1efe97bc8ad815. 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/QMFME2429043.
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 0x80f3d55ebe2b2f141979b43a5a11a949583a85013b85c921d3f9d167fdd223b9. 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/QMFME2429045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6ffd617645093e4cb867e5695416edb2f9ad4fb789b1b7129f7095198029ec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEB331441402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27d84a8f51942042c3723e25f570e80209bd1cf2bdb30e06168434190c27c1c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEB331441401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d706fabd7e6e4a6e366a02eac580ee3a9aa75776a80afaa7954db529b52416f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEB331441504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51421720cc4bcd1491fdfd8807c8b97b8557e884570c9e65feb846ec0be2ee89. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEB331441405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8830b736a5a2de29836b6a64c3b5f1af0cb47b9e2440f3f8fed13bfc070ede8. 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/DEB331441404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6413dfbe2a07ae8ab6b2ce79ced1f04773f50546550be91a76a6942190963528. 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/DEB331441408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e816578da9f2d4b0bf95be84f88b0f4f1f95fb3ee3364752fd34884483d581b. 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/DEB331441403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75842ecc07ac16e6d5fd71f139c57a3183b00155e7e21e896503b18a3e6e0aa7. 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/DEB331441406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d771ae6910d3b2d297928bf1f462715c60e56319f3027494861679f6fb2e9c8. 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/DEB331441407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca98669f98aa1d3fe9f6d378b4bdc65da5c06146023781915fd0ea3e5e647584. 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/DEB331441503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dc40185f7141825395d30cfdc36afd0b526a2de5f0652b7688e568745e67fb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEB331441501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae670db7bc3027baefe2e1e2c9434522c369fbdbd7bffc863b8da4de8a9471. 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/DEB331441507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37ffe758b7a3ba2a29b5d13d3b7f61eb6030a4c12026b9c566d1ed72a587913. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEB331441502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02814d925ea0be363f6d3b404193ad99a78ab74f04124f106878700694812435. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEB331441505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107abe75c8892b76b5afdfe46dc86336539cee471c1b3f4555b51f43ac2b282b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:33Z), 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/DEB331441506.