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 0x547ee61296728af3900edf6b357ac366f35275385c391a5a5db1e14c2212f957. 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/f12bcca0-7878-497c-af75-8787e1c2f1b2.json and https://artists.proofprofile.net/proofs/artist/f12bcca0-7878-497c-af75-8787e1c2f1b2.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 0xbdc9138925f07e9879849c42260af1195fba363037754162a6b9ec512f6bf625. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARF049700716.
Colección Guitarras del Mundo, Nº 3: Latinoamericano
Colección Guitarras del Mundo, Nº 6: A Doña Cata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af7f4781778df24d2074e59c06ca96faa335a1da8e0cbd5e1d0278a91bd32f9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USA560307108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c142a8c03417c12f981980596f2681c1f0cbf88b63b68c835af1cee4478f58e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USA560307121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0077c7cd426c29077e43bc0e9da4292899673f681bd0d895bf6f051260026c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA560307374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d883a0e113e98db3f97e99165f55165e6c443fdd53be5b4980a88a3bbddd5d. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USA560307376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d80396f65e51f58a6c889176f716d5d627a86da4b549e4a905bcb49b0406242. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA560307379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6056f20188c050ca2136e8ee2692e3979dd4b006c927bc0f33072388fe820. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/USA560307384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2db41834b5eaec8f5331119b8f3fae9ffa25920fe2de138800bee78435c51f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:33Z), 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/USA560317745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215820825c5ca9e3526c8937e0b395b3d4e08a1687d3fe88ee5cffd6033b5eff. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARF050300484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43585b93c3a23fc45d5cf3428208fb11ae8cac0e6aa9deee3c7746f914305254. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ARF050300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c8f0108058baebdfbf5c25e6eb382edcbb53ca0710d9002bbf26d4563ab045. 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/ARF050500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bf0d6e009f3a5c4a496b722f7ab1a63e0ebb0cc0a232a31617237ee4bf96bf. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:25Z), 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/ARG601600235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5530df4adc0c97a130276a1bcf21bd8d423a781138efbde0c9fc824dfe094f14. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARG601600238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107f56a1ebd85e1444f9ecd9512c7b9ec7266755cd029bd82c6768ca16082811. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/ARG601600244.
Melodía de Arrabal (feat. Juanjo Domínguez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520cd6c18e63a0a578af86e67da1da6788c86e4ee5d5aae445823ba6abb7b754. 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/ARG601011869.
Aquella Noche de Tu Partida (feat. Juanjo Dominguez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8089b577f9162c52760b1f2dd0cbc562d3686318b874f4ff48b6361be5aa9957. 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/ARG601400694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7091db7d030e5fe72265b857ed3067cbd5a0a5c25f2c6a08b302c20fb85f56. 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/ARG601400695.