Médéric Collignon (born 6 July 1970 in Villers-Semeuse, Ardennes) is a French jazz vocalist, cornettist and saxhorn player. He learnt to play the trumpet at the age of five, became a pupil at the Con
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 0x5f0f6b67d77e2c5c9edcb1d4b278e8175fcc3e40038608a2771266afb498c19b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86d218a3-9b4c-4f22-9082-958a0f45190d.json and https://artists.proofprofile.net/proofs/artist/86d218a3-9b4c-4f22-9082-958a0f45190d.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 0x25146e0342c69bb23b8affb96bd59b62c13ff71dc8dcef75dd0f6d65bb9f1885. 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/FRUM71302268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c06a977d5932c9f674e5ebd8d764ff1d67d5882a600b5cfb12d65e4a235537. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRUM71302269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831fe8131ce7f4f1caf4eeebd5ced2fa869c97662a3151c446d670258b286522. 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/FRUM71302270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73baeae66d7cb06064497d65e0ba9d9c0406567ff9d50a882c19681a9eebab6. 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/FRUM71302274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d67d62e02eeda9ba8527f5de8875a0b5a3568a96e83875dc24484a6a842c99. 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/FRUM71302276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f5fc055a24a68d57e528653a0e23a4a2a526d280a19288d927f5eaefcafc61. 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/FRUM71302281.
Pop In Jazz (The Greatest Jazz Covers of Pop Hits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156f219948479cd67130c6acdc67b2e26d31ee2cd372f041d3dee44dd7f09809. 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/DEA891000856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1117533945486c890e0c34bd75a40ed039a86bfc854f7ca7132e3b410f7d63d3. 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/FR47Q0603740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363f44340b4b29dc695258d0de000f5ede59bb1cd3c55dce6e1ae6a4387fbad0. 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/FR6F31642410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9639034ffcaf42134fe974d3ba96037a3e0e430b086f190b4c4da4677ab1aba9. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEA891001203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3708239891f1febc6a1b0718e9d4028e78e8f61231e0405165aa3b1e664fc28. 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/FRX190802365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8ea9ec81fdfa0e99e8c289779ccc7986f9d4abd98c4b15d219c9a41f2873ec. 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/FR9W11008106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc684bcf50ada646617fbd6006c42bf3cc3d65982c3b16a3385c1653726955a. 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/FR6F31642430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffc77cff062a54b328ea9624e5d8d49a6e48e18246e5a1a81033229b6f346c3. 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/GBMEZ0733974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c2b16be8614092a8ee3e43d63e260160d8ea6ee3a052dd0b083ba9a38f5eda. 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/FR1F30500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578a98e60074d15ad5294bf3d3f477763fb4ea1ab21bfbf6d8f4f50231a0ecaa. 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/DEA891400071.
Hello World, Composed with Artificial Intelligence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8812b215fb86bead3b0ec3e3f6b412c4ca8035e33e6909ca6adb4a207c4229. 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/FR9W11727001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b4647b232a86c42c70f4542a3da64fccf61f9ae04ad5ebdc22ebce2d1e81c5. 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/FR9W11726991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacef14b4052f508105f33062acefdf4cd27514ec0906a392d50507cc72e3ad24. 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/FR9W11726990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02363f0229dc359ea81b73952fb3dd787d14b7443ee387f7154fc0004a59d94. 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/FR9W11726992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b3af39973a6d48ed2d36eca1c91acd0794b85709ce56747cf7027ea08f81a5. 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/FR9W11726993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d7c0581fe47763ffc6a023d995234acd4fbe4e70d0ab59c671ae784109f1f7. 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/FR9W11726997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fb15cc7268c34b71e996e68c71c7df7cc87f2a2748fc072dff322bf4c0cc1f. 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/FR9W11726999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298857713988cacad9977f448680e7fa51ac2fe97b1e7f8b16ae37604a781661. 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/FR9W11727003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea4ddc967215c9990ac611ef8501aba7be0d01c9d2f0c50310532a42506a10. 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/FRXWO1200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc15d717a565f4327d3e857297ac6a1b526e1ba96b2258b7fd6b94d05d0ece43. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRXWO1200034.
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 0x21a594b60efb2c8927997ff1770dee9a9addb50897787018664b74ec4a2075c5. 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/FR00W2000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaedb0cede60aa7c8114366a521d1f1cecbce20ab84a9d546459bce33e89faf4. 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/FR00W2000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f76c69ca89d485afcf8d3759a1cebad99a745bb6620f8514dbd8a9f5f67035f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR00W2000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503e0f946bbe786c9f41de8e7a28ca75805753050d87cf2f58b1e1494bfb0ad3. 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/FR8E72100313.