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 0xfadb1fde5d65810276ffcf20b743a3c8e1d28bc55f68d1f264b8d34e2beb991d. 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/3621a7f4-734e-4fa5-a885-223fb31632f6.json and https://artists.proofprofile.net/proofs/artist/3621a7f4-734e-4fa5-a885-223fb31632f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Bayonne à Beziers (Compil officielle des fêtes)
Sud-Ouest: Les plus beaux chants des ferias
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 0x517f5c75854817223b34320f00fbe077ede25d85897c3ad966377e91e4fddf37. 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/FRZ510200003.
Voix du Pays Basque (Versions Originales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382c3fee4557189b2d27b217db654a1f4b701ce3c318755b74d17e06b1bff2b. 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/FRZ511300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6658227e98f3d01c9bf8be520b0cc4f04c9b0e1fcf0580e94613e178e6ec5e5. 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/FRZ511300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33367fd0e360865a08f764d751bd19e31ba189a8f008b519e9d19bece6d5ca84. 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/FRZ518800062.
Fais-moi Une Piperade - Chante Pas La Bouche Pleine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7227b99227f6153894b8583f0948db81704ca684f7f0b36e23d0872d0f4d48b. 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/FRZ519600185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c93a026c4153ddfe3cdcfa42454cb1426beec87053ff0af3734cf889f55115f. 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/FRZ510300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736324fe09a2a9a9a73ad25493412e1af48515381c052ed7e7ccdfdaf581dd7a. 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/FRZ519500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c137920ce32ec10b6ccd002494934e2f2953cd78a1bcacfe49c874955404381. 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/FRZ510600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85364bdebb793f79793b7f8c38219e194e3823674b759b6ca59c23e05e03e1a8. 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/FRZ510600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517f5c75854817223b34320f00fbe077ede25d85897c3ad966377e91e4fddf37. 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/FRZ510200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0c4214848574d1132313d82a6cc7c3943e79ab7ea21f965416bac9c5ca8a0e. 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/FRZ510600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c41a99313c5a514752a987aee6c037f58c7922afadd686131b6e9e4525437d7. 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/FRZ519500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dadc9f56b65a71000905696a5178ffc4f392b8e71af018371cefd8fb652c6b2. 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/FRZ510200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3efbd83f5f9e560ea6ba9556a2aa718723309538895d616fac542ffa62859bd. 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/FRZ510200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517f5c75854817223b34320f00fbe077ede25d85897c3ad966377e91e4fddf37. 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/FRZ510200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab468aa29f53049b117f50727ea4af39013933d7a08bbb0d3dd1024fba1306a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:08:00Z), 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/FRZ519800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ce490b67aeb2a1923ba88c415f7124f2efcdd63471661b757214e94974134. 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/FRZ519500284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e49fd959cfade4d31eca41e77fbb3b809871a4903bae394094132575ea22289. 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/FRZ519500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed12b8e695b38b8295eb237e97ba6f1722e698f3863f70965a0102f4c7ff84c9. 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/FRZ519500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c93a026c4153ddfe3cdcfa42454cb1426beec87053ff0af3734cf889f55115f. 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/FRZ510300044.
Bayonne en fête (Album officiel des fêtes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b35892ac2c204bf4ce18a55d998d57a9d8425e85c6c8fda8f2f1dc8ca07414. 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/FRZ510000289.
Fêtes en coeur! - Le CD des fêtes du Sud Ouest
Entrez dans la fête (Compil officielle des fêtes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6468d3d3b0cf86915597d06ef8e7ff9e3892f0a1899f2ed954cb59d5758c4d4d. 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/FRZ511400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d0296a8246bcfc0d2d233effe1d5e24a628029b9b672c7f606fb2b52015283. 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/FRZ510500063.