EN, En, or en may refer to: Businesses Bouygues (stock symbol EN) Island Rail Corridor, formerly known as the Esquimalt and Nanaimo Railway (reporting mark EN) Euronews, a news television and inte
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 0xefc4261ce906132d5829e92b58d9b76364434b71600dc6ae7e56db4135205579. 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/6fb2c216-ea6e-409d-bdf2-28425ebf6694.json and https://artists.proofprofile.net/proofs/artist/6fb2c216-ea6e-409d-bdf2-28425ebf6694.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 0xdfa79df3d23edaa2c08d1fb42d4789084fc0911dc395cc87b47bfed1b3febedf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee0c2145ba5be23c7a5a0d0800e70d938b010f2b40bc4cf55a9cfd3c68cc037. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bece3958436aef4029ad734a81b44de5c96828e67cb3354ced2019ecc393e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ632401151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1809c7e657662691e6731b05866234fd7cd78db4e5ab3f18300ebd107b0c0. 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/CNZ632400663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb31b8e7ab80f337b1f2f1f5679d84ca93837af03e3ce12ac4a372034ebe013. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ac82c3b0bcde1e6b83c3785966c907811758692c577b865608fc0d7f19b728. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CNZ632400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872744609d1797a5837ea34535935e3bcaff6e43ea564edfd83e9a331ea70cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63cedefa2fed09fe9b78387b267857607a9c4b5f8766b8fbc9c2718ed00eb5b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25d6cb71a778f38e98bb67c129e252f2801f8c340cbe3f39c0f972995f57420. 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/CNZ632400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ebd80191f0ccde9a7a1f4656653477316105d3d6cdee8469ab14c766fa3d89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd591c9f5f5ae652e42a4ba39570971b2ff90e57264aa233a56eca68f6ba0e9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:42:44Z), 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/CNZ632400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fc74238edd56e2d99ab278494d2eaf643607b1500eb3492e8b288ae100389f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ632400450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745bdb7f7481f94a56e31803fec7e12bad57a59a10389de95e11f64e29f8757b. 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/CNZ632400452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a6c95ba28c10cd725a098a53590846bff8d35925bd8cb2b058222b3775d978. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CNZ632400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c63a9b7d2ff85df36318c7d4cd920be2dfb4822bf5eefb53e25d5648410326. 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/CNZ632400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29178ce5f8e04ceb7f2189078d12c0bb96d5fce6f5450e0db7f967d598e016f0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CNZ632400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423db06fbd6f1f8013d9817bd8be58fbe3394523b460813c82a31585ec453f8e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6964dd9240a5148cfc388ac8bb1b533ad285a0ef1850ce1f42d6af54ab608c8f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809985aa0c7ecb4f57a81343360df8e36a64e794196f94605887b2e814f62ff8. 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/CNZ632301404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f06ff74215c51ece3bce9abc92147939ba6e2bafe73a3d02adfb5a507d6a236. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfd5924ac8b98fa3ab35f5a3cbb5ad282d594b40223952810b87389abed108e. 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/CNZ632400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f6afd89e57b0055de0769a9921fcef60a1e7e6865977a120422bcfe53885ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632301410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3e67b9b2fa6eeb3e287f4b4c8faf3931574d09ef0938d4a5fe94a1788d70e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ632301395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5241ae065020d413c3d2096ed4f1b1b2852734d49bdd23cd4d2defe71bc6ed49. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ632301388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc0c23efd750bab7c8fa2eed12c4790d5f210b7d53e95a33783ca83d0e6e2ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYPM12300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0f9f6f7813168e901ccc1308632d36457af9a9ceaa57577fef256a2927a5a7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKA412300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef7fa3c4d359b354ab3f1cd8996e02d8c7ddf04d486e414f17a4f56ac6edea7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA052340095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa64aa933eda0af40fe1f297e176ee81ec1b50b25d56e0f4243e616b79d3d21c. 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/FRX872309025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103bbb6fe3ea6294c053bf2dd374f518a085149e0b72581f0461e3e2a1b4db9a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762313993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc587fdba6b6053be4999ffdd106d94e884071bb4481ac82f3ff9234201db21. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX452313968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb27ed5400b16914d99953f8fadeafe84ea0e65597edaaa3118e3f8eda8328c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282305831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7069d410e251b6cb60510bb025da1b796b46c75ee778fedd911195cc42d5d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732242109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4516fbc6ef542e2c44c43019f602c7e9de8a2fd6720167aa969d8597064f7137. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732232232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea3a040375ca7ccbc3840d32759845037bb905fd19c3aa7855afe2827a9ff29. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732225229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b99340ea7d4cd09d8278fc474e731d091386ff031cf09db2b1eb85daf25226c. 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/HKG731751402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb0499a00b1283a09a43b992ac507f7ccdd6837da240f6db9568d829bcde372. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731751403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf692528da788f4f2b5478d5c5b9df7f6a74c3753cafb36cf68ea81056cf0d744. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG731726701.