thumb|300px|Amandine Bourgeois presenting herself and her Eurovision Song Contest Song L'enfer et moi. Amandine Bourgeois (; born 12 June 1979, in Angoulême, Charente) is a French singer. She was the
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 0xd1150890dc4e1cf598622136af4ee585a80ddd026503a6533c0a1e552f26e33d. 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/7200d3d0-a78b-425b-ba43-5b0373f29c8a.json and https://artists.proofprofile.net/proofs/artist/7200d3d0-a78b-425b-ba43-5b0373f29c8a.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 0xabda694538a714b59edbdb681a954e4b7fb6a820538d507f113c80ce15137b21. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRZ080901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecec233f65869eaa36707f93af0dc86af5c2bf61cb49f4db2825bc9f220591d. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FRZ081100646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894ce7123288e5b6ab22450c9a301247959ee02ec182bc01ba88023238e4fee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/FRZ041300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705c29544dc25148d224416dd6447893e0ad3e892992cb7c78e46375c5700c3b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRZ041400024.
Il est cinq heures Paris s'éveille (feat. Cali)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c44d565de82fb8279d6a51f7dea30b98fcf773cf2777a4b576d1c05d15c73a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRZ041400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea6ecafd5f5e11d9c49ea25f4baf360b758bf7ded54f3b54cb29dde870a5a92. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:30:01Z), 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/FRZ041400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6989e0f78eb98ce373930d7ec85246e3be0a3ced63af401c4f64464a6a3f1b0b. 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/FRZ041400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894ce7123288e5b6ab22450c9a301247959ee02ec182bc01ba88023238e4fee. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FRZ041300136.
We Don't Need Another Hero (Les stars font leur cinéma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20088d81d0d4b2e6fd6f0cccb6f941adb151a3979ef0c9ba8093d7bd23394b6d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR9W12360196.
Tous en cœur (100 artistes s'enggagent en musique pour l'enfance en danger - Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada381bf96c4190e2a35679adaaac1b90144f286ccabe6e22898a092c3b0be2. 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/FR7Y71300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323021006a132f6b4f51c0e114ebcd93321044329a3a713187f79df21498531c. 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/FRZ080900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004892c84ee6132b425e391ecf3ae801103207ce034a26ec6f0776d1eb8bfa70. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR8Z01600066.
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