Fra is a title of a friar. Fra or FRA may also refer to: Codes fra, the ISO 639-2 code for the French language FRA, the ISO 3166-1 alpha-3 code for France FRA, the IOC country code for France a
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 0x1c8a70e09af5e15ba55f0a56cc8ae8fd85ccb714a4d91fd53b4cfe859ca9785b. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/285ad5c4-a9fa-4787-9f76-606250f48ff6.json and https://artists.proofprofile.net/proofs/artist/285ad5c4-a9fa-4787-9f76-606250f48ff6.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 0x5ca88183c07efcb2f9848c125c1c7bd535b504c1020a649c5afb72344015b036. 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/TCAIB2439990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a43d4b83a07bb043561cee579f6de039f4d39f9d3cccbda795515e2c40fb22. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCAIC2419792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bc9287a6f138c5ce3c5c02817629e6fb27826be6f7af65f843f0a0edf2cb87. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/TCAIC2432133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7606768133872b99089e1b8a316fc9fba7ae2fa3b2b1bd642b2216c2f6ebbf. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCAIC2482170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527dc35b44249836876643331c26d2cf543f4dee6252809d905721a0e466a173. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAII2452357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7008d65daf1fb7dd87ad543087eab2fc3195d8137577bf2025b15ad018ede850. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAIP2474608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a0fc84285994941dba3ce10071ddcecc9d3441a492e8045e42c20ae48dda8a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAIR2451108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b09da55a9820e1098a766e2a9d6f9f6c88eff7b6cb9d7e3fd93bdf1bdf7e76. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAJB2446303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b09da55a9820e1098a766e2a9d6f9f6c88eff7b6cb9d7e3fd93bdf1bdf7e76. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCAJB2446303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a84d31c7f99050f8ffe8900eb389339ba465f14bd673243809b3954be64792. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJD2445470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d6d217cb9f13b1d1d19e372ba9ed8533f8a45a98d4de5d9de793deea7a3e5c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCAJE2520563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a08748ee8fcd112c09eb2ee5fca454e6f668dc87c2aac73a42a3eb72821e95. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAJF2578402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a08748ee8fcd112c09eb2ee5fca454e6f668dc87c2aac73a42a3eb72821e95. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAJF2578402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eda0643c6e8aad4ca6dfbd8832b4b3a36a8ee15533a4b3d0c8c3c2cb52d909d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2540698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d19ff6e2b9e6c67cbc068096f5f41782044d6317ef41a8c044877b8080c380. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAJJ2519663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d19ff6e2b9e6c67cbc068096f5f41782044d6317ef41a8c044877b8080c380. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAJJ2519663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e6f9ce65051db0630fbe881ed43e0e5c908e1893eaa7ee7087981672acd7a. 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/TCAJK2526122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e6f9ce65051db0630fbe881ed43e0e5c908e1893eaa7ee7087981672acd7a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJK2526122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080ef1842161e13c7305978ffffa7c220ee8b9f58496c878bcbedb0a08283878. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAJL2592849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158e9c0720ef7635489cd3bb945e454aac42ac7d9742ee3a04ac85c2496e57fc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJL2580456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23656b5561f4b8a44a9e893c9fb290bd483ffb31a2fe61691a0796804ba07b4c. 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/TCAJO2501832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d022d7c8f81ed9541e18466195809024942f9abfa02709384cde69e4ef0fbb. 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/QZWDE2536141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368791c6ba3b4c84d04b5c8697a9f25d4cbd118b56cdf8c04cc7e1b0f7440a95. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZWDE2543049.