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 0x2a0e2d4f25f94034572878a5e7c512d800af0b229117ad73e2922b79a6c5dad9. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19719f6b-301d-46bf-a995-6b08240472a9.json and https://artists.proofprofile.net/proofs/artist/19719f6b-301d-46bf-a995-6b08240472a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Discover Music of the Middle East with ARC Music
Festival Guitarras del Mundo '96 (En Vivo)
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 0x9d167e7d9a5a8bf6abb509c071f068b5deed9aa9aefad3f733468b6b6f210685. 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/GBCKG0500721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc021148fb86db44d5cd12d0303c8d51240c7b93920643ebfe3167fde750197. 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/ES44A1501401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081a9335eba3a321159b6ebe3c6795181cc42de43d5f087d8dcf3c8d2b5a87b4. 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/ES44A1501411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a076704cf95eae9c439ce228eb81ea269aba14fcd203fafe01f9839369e785. 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/ES44A1501402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930b1fee6077ab3ec79210d5d576772d81aae42766cfd9c03b926b167879197d. 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/ES44A1501412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cc4789a0f9e2d1ada6fe62f99b2f0e55062b21a4c8f0035a1c7f0f1f4046e2. 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/ES44A1501403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e36b6841d5c7aa7a9dc02f6977f5b4513738f129f8633e1628ee089e998e615. 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/ES44A1501413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd62cc3df4010aab55b6368351e702ce973b35ae45bbd7c8f7813b80b8bd00c. 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/ES44A1501404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8443118a06ce2d726eca1d79d9b9dfa4d60857aae9f55ea688cdac19da0fd518. 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/ES44A1501414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06626d00e78a261902cd5d904cd264ef06ed6fab7f8584a99c919c7fb49f06d. 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/ES44A1501405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a211324477616966216376923d3245dec6c91e9e56c9a74d1b911069d78de78. 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/ES44A1501415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf419549490e7af77de4b48ff09ec376a95762402c0b5349f3dc0fe79c706e931. 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/ES44A1501406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8419a7b9e32a43128a4c19b53b7c6923cca81934458fe576d2b0b48e06ea0c. 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/ES44A1501416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a1f061373f1363b6e43f90a4f68042a0da313946736e62cc968011218da4eb. 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/ES44A1501407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fd83c8a0a052fe6fe39e8ae5a5d983f85ff1be704d350d78619bab46983943. 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/ES44A1501417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcecac0e87b6e259817a0883d60ca4e2afd82ab8d5aee0696654611df777cc1b. 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/ES44A1501408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd518613a16aa8247295fb1bad478237475dac64113a20d087b467207da585b8. 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/ES44A1501418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e9839174541ae059e8035a81c879adfa11e42cb4584377c3854d08d037ec52. 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/ES44A1501409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5631e205b731ff59a37d01e5dcae252362595f137e05f0908db056b858649bce. 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/ES44A1501419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef233c21d6176f6f065390fe4d4e79168b859095fe5db395189f7e80ee9366d. 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/ES44A1501410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a7ef678a42a26d9f3f39cc85b9cd135bfb80ad142a89015040c08813eb5bc1. 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/ES7351110549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b2cf897ec4f17ce50259c2bb994687d427cca7512f5650debaa5fe424fdcb. 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/ES7351110595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729ba51232481fe7a117cdb486bdbd9d94d826adf336b7dbaee5712188537e51. 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/ES7351810038.
Ma mère l'oye, M.60 - For Piano Duet, M.60: 5. Le jardin féerique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763eb87eb922d4b4604ebc9937f546105278c745541c4fd152e9178a8fa2b7a9. 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/GBPFS0600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bb8c0d64437f14f37469c6dc86da9e57dd44a2a4663cd6ced137260d82b99c. 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/ES88A1707503.