Philippe Proulx is a musician from Quebec. He records under the name Pépé et sa guitare (Pépé and His Guitar). On his albums, he accompanies himself on the guitar or the ukulele. In concert, he play
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 0x9bf43bfccc329a3151676caf2e5a3a6fb76017cc9c442860eb8ece58e4d0d58c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4596fb6a-26c6-4071-9832-6babd186f045.json and https://artists.proofprofile.net/proofs/artist/4596fb6a-26c6-4071-9832-6babd186f045.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 0x649206763eac1779ad6edbf221ccebfac2e7ceb6c0529152a6e7f377e16d58c4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/CAL540506402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba1900ac9450697d5cede39717d85429af646abfa367babf83df9e2dbc85f43. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAL540506405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572a3d25ae0bf1986de5fa6cb53a73b8e95d0db36e27c57c4b6809208a1e4033. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CAL540506413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbd0433328fe7cf3faf31d9f490418a78d5f1bf649589fdc25d189a061c6996. 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/CAL540506422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ff4e5a98e686141af73a9cc65b325916a22ac7b0804d7cd8a72fd9ef00eecc. 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/CAL540506503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12392067e655db6686103b5882b5795ad6f2bf444a37ccf18e4688846f43104. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAL540506504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff8e4680d18baed4355f63d99d1d2a3395229466faddd3a98bc9f820c44ce7b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CAL540506514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4717b99420e3530c317a964f3e2c0a9d00fa7a55c9303c0fe548a3df55da54e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CAL540506515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad5a2209a706fe8bf86620750d7267e9efbe49b637140af3045794b4f7f2764. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CAL540506520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc70788c4ac0e12ef60af176558e345a7f7904172ab8084e45909505c38a651b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CAL540506521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ed7bd540e28558c4537ab0cbcad4690f767207a24aa0cedb998d05624b2ef3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAL540708602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2819b4adeb68f181c2704bbbe282f24771eb8c92ba12ff3e356f946ade655997. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CAL540708618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8537a375b7a60a592bf6f4e24e59eb8aab5c74d69f1f077a41a2e511f227d177. 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/CAL680933355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bea45ba5d9f435817aa86bbebbdf80fe5cd43baf0c76d508e6fde2cce5d27e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAL680953535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11bfebf39b223136b361ec0e351e2889ea8cc7629a02e2f71a6b46da86d2ce. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/CAL680952525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a709ca2ad5aeec3265080fa17bbe1b060269da679c0f8fdc38bf955e27c682f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAL680911155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064c19cb0b00ecfb406bc2d35b65e67a5f35d3ad9484555847e2dec0f1751cea. 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/CAI251112304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84169e1d14500abe621077595a24ee48a6edbec609f8ba9c0f8fcb860b08e979. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CAI251112306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86205e9fc1afd77a186881193e14787061f8c8f5733d889c9437e9abcced1dd0. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CAE9W1607702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8b6b699d9a31775da1835c02462880fc59d08d7ebccc71574c29d95ee2cdef. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/CAE9W1607703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ea7c6e5c98fb7dc7e6282d662f966bb800180468d974ac889e7382840e319d. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/CAE9W1607708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d630e9a9b9b7ccfd39b11f8abee35e368e7a4ccd15674933a4319015dc05ad9. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CAE9W1607714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bf9a100fa5c4dc0b8423c1c1a53115842b61ac44f1d437ed106b0d4e9f5c7c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CAE9W1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378168db5ab3a286185edbfcbef2874ee4bba419b043acf894a4c4d0329f1720. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CAE9W1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0667ff3e657cf762b08d4728335afcec701585101a35edb4372b3467ab95fed4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CAE9W1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635341603e33c315dee4ee35bb8160f7cc2dbe7e2539e32e972ff6ef7346c5a9. 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/CAE9W1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95501a4a581a9738aa92b921b285a26e2f7173108430d18232401cf86af52121. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CAE9W2008802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7ecba95314d001d99f6b35557a67df185b7e0b556b1011f3dc95108f8b11c2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CAE9W2209904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85cc5f78308ea9c73e7242ee75e65dbe5d19584d5817fe50814c035575ef026. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAE9W2209901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ba9e7e4dc97a86ab1282de02d2018bfa7ba62e3733953719da09f38abc08e8. 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/CAE9W2209903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3299335990b3e011760eb120d633265829bb977c0d48248142ec571716964d9c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CAE9W2208806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f263b3850c6b77d4a91516521f8a9b643782cbfda7b0bbf2ee738fff6797b68. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CAE9W2208807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f2a9cfe6b07376150b9acdb1b0b2723a2310f9f8fe1fc997967f89187b1a09. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAE9W2208808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334e25101e6672dfee53c5a9590c6b984fbbea8dfb8068eb82f20344142b2c6a. 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/CAE9W2208801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149942677e8c9d6cf5f8bf2aa8890d3fea998d351253278d5813be2ed05771e0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAE9W2208803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ba6faf1e4053305e8e89f232c4225bf8d9adcea7cf53eb3c3b7a7f8f7449a1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAE9W2510106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfbcbb0f98974c9a2d2a01749c116a6340131850c0108e211791151431f8e02. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CAE9W2501302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fb5585ef480c85645ef44248751c813d4f1431d66e9d9ad54bb48948a0691f. 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/CAE561610903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcf2f49af920d05e79b530bdfb8be9b7784f78a3d6485c9a6d3a5bde68f862c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CAE562434006.