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 0xe05e1f420693b7ac6b9e70420a010c64ef60c7259941faece9eff59a1d336831. 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/8a3fd750-be88-497f-ba89-af9506a6932a.json and https://artists.proofprofile.net/proofs/artist/8a3fd750-be88-497f-ba89-af9506a6932a.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 0xe55928863189f5e8e8ab3d51aae9266aa41e533abd44fa40f4d9179808afdd21. 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/QM6MZ2261664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802082e0861eb6145b179ce258647c430e84d210f90c0b0ee7b6757eef319a06. 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/QZ5AB2398233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe92627d32a26b8aeacfb7e7612b8f527e677cc56a07daf0ade36900fd6611a1. 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/AUGBT2353802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa9aefed15db914cf72d81b8f5263362a76a3c069242634c065756227d0ced9. 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/AR5UH2301643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00ee70a1879addd7ec3a81a6b14d9c358ae6a7df868204553f4605408c7479d. 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/QZMZ92387038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6af9be1829da8d1ab071da629caa67188928db7f979729eb9e3ad34f8342b4b. 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/US7VG2415186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48de1027ec15997c6cd3284af32a19cf7bda812aad89d9b6f3f4e0d51b67b9c9. 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/QZW9L2351326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59f91647f5117c833bc2634a44974dcea5c701f20f6e95e51784e7d4e914015. 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/AR5UH2301369.
Turro Diferente (feat. Omar Varela, Preciau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8849f397ddb5d300fda17608dcb72f0e6e5aeb9863a0bbf559477a23967d31be. 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/AR5UH2301359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b85542c89851f627a4289a9b60ab8054d80136157ab9327db0dd65ce770ea9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJZ2365677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a077e77fea70b9a81cb329032839761fe32c760b37624de555d9d25ff63b78. 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/QZTPX2315356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965e10f5040247411760e2c9a95321691ad92bde1afaf28e7e5c95f5e991895e. 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/QZNJW2382074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd198f61c2e150c03c662d49f6444fd5feb3c88881326869b592c5392e495cb9a. 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/QZGLS2344570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb8e3693ef5c1dd293115a4e8571dfc2c8fcb3f3c7c0be5c124283846569a8d. 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/QZGLS2314303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70d0f23276d4f869ae5838af46f2e475203ef8c42177b54761508832f4f41ec. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM4TX2301435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc8ca7495cdd58a15f7829ba5524dcfe2f02a1eea72f81bc777720d93d7414. 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/PYC842300642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602580df4bc94bc94c542168e8656d3c7161c6337b13fc641fe673d4110e85b. 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/QZW9M2285900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf75e583fe60ed0d6ef656dc6dc73a4b45a67babc8446f7a01fe4db9ed9586f7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM4TX2190063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30ee05be1a246c87ea47cec1bb5fee4c02d8aa834c6b5dc879a74cb3a9394d6. 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/QZW9L2346202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa24dcd72a6ed7aa4f756200095ba879f126d5fff9795a44a8a5763aa66ff7. 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/QZW9K2384914.