right|thumb|Fréhel Fréhel (; born Marguerite Boulc'h (); 13 July 1891 – 3 February 1951) was a French singer and actress. Biography Born in Paris to a poor and dysfunctional Breton family, Marguerit
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 0xe00eec705ae54e00f73919edc804e5c5bae7767350caae0351dea864046e12e7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59506480-92ef-442b-b7fc-85fee057efcf.json and https://artists.proofprofile.net/proofs/artist/59506480-92ef-442b-b7fc-85fee057efcf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fréhel : La jave bleu (Histoire Française)
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 0x1d820e78a3a8c31761dd88b98fe3d425207462a1cfa08822dfc1291d15462bd8. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/FRZ111200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fde1d480e07ef04104b38a54c596b91f6cece29cc521f7752f7b0b92b00852. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:34Z), 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/FRZ111101187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb135bfae998ffb0432b525a1e3f594a1732fef29c7b04cc7e8ad860a79b7d0f6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:40:42Z), 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/FRZ113600440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3d2e0e0ac234721817f097b4f8046dada53424ce7cffd94b671a27f2eded4e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/FRZ110800429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeabe241a3f5784a399ec12f35d72c1c3a49e00b5c7cfc76b11839668f452f6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRZ113900500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68cd52f497947abe7793f9044917d2bdec2f7b6305da1fc9fce1a268b7f313d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:54Z), 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/FR6V89904237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fda85fa8217e8d06050b608fdc5f8f3a21ba1a93e73516890c19d29558003e. 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/FR0O70813227.
Les meilleurs artistes des chansons populaires de France - Frehel
La Chanson Française de Fréhel: 1934 - 1939, Vol. 1
La Chanson Française de Fréhel: 1926 - 1934, Vol. 1
Du Caf' Conc au Music Hall 1900-1950 Vol. 11
Meilleure collection française: Le Meilleur de Fréhel
Chansons françaises des années 1900 : Fréhel, Vol. 1
Rue des cœurs perdus - Fréhel and the Dark Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a18e478d5b439ef8a93aed3366239e7ce1ede819d734e0cb994155da009ba3e. 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/FRZ113900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ece894421072a2c0152ad5dfacadc4e4cac56e3bbcdb30314570b2d0ba766a. 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/FRZ111200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50278ebf89f1e06e592afef83aa5d0e5a0b3f32a3181adf9addf77e4df0cfec4. 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/FRZ110700290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeabe241a3f5784a399ec12f35d72c1c3a49e00b5c7cfc76b11839668f452f6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRZ113900500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a18e478d5b439ef8a93aed3366239e7ce1ede819d734e0cb994155da009ba3e. 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/FRZ113900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed75b6e3a9488746f6f375b28950d7e3cfcef0684a19e9aabdc6bd0e8913b4fb. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FRZ111200260.
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