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 0x41f7ac66d394bd79d5decb025742e3f16d584df77a51719c115ea23e4a3e8fcd. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/260b30d6-7f41-4fbf-9b65-57419bb06c9f.json and https://artists.proofprofile.net/proofs/artist/260b30d6-7f41-4fbf-9b65-57419bb06c9f.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 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b263dc0a6f11ae8950a750b25fec83b9ee0fcd3b6158576842b809835f4020e. 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/FRZ519800113.
Fêtes en coeur! - Le CD des fêtes du Sud Ouest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39dc591de4de10af10bc67881587422c94302fe449da0b51cbc0072a2041ee2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ519800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8ee1c52d918dd2c4f28b18fba7ef20dc0713f18ed2daf641a9947eff8bb541. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ510000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ed4974f7171945acfbedb9699e45e1602c7112a9911affc140cc3999d3f33f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ510600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22df923796c7b35d04d5310d50f8817122e58f97c69d06fac13ea245af1a33. 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/FRZ510500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c98b1764c44ae9561aad2f8567bec987dc5996a0905dcdb1148755c6dd839. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ518900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97178d20e52ac80172dd91529c732fb45c0e35142ad715d182436e514d611429. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ519700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c7402d05724693e5fd56501fe8c8c218efcc306e09963f32d3f8e072ebb35. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ519700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5410dbee4d4bd169e23af477a316564629aeecb5c7d5fe7e4e2f10a6cf5b542. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRZ519700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791bb7c577ef544956f4e38eb258516398ab56222ea706b0669de96ca7e239aa. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRZ519700014.
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 0xee0d348aaafbf917e843f3213ef3424b55d364552eed360c7e009dd1be1ee737. 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/FRZ510100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfa17b0614da3a47431242af3cc7c2912010957b8e7f4517edb643bca9df30e. 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/FRZ510100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1616e1e66b0981ac973eda0b7fbe671f1674179d7b168223a0264f592e2046a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ519700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820f03b212b17a8e272304fbb501d8a02b2e6d39414e0824b9f3862a20fbd7ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ519900336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fa1ade63e3a51d3f60da1e0bd826e4e94a19a7603f73eb5691595ee5cd6d56. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRZ510000430.
Paquito Chocolatero : Dans Un Verre À Ballon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c6e115e0a55ad79eb60280e6a30d0d2914a9f7ca1384922eba8452c1256c58. 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/FRZ510100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114032eadca0b59418ddf2e209175dcdc583d579dff1237186ae1fa45b9abfb5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ519900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c98b1764c44ae9561aad2f8567bec987dc5996a0905dcdb1148755c6dd839. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FRZ518900023.
Ordre des corsaires basques, 40ème anniversaire (Itsas Kantuak)