A1, A-1, A01 or A.1. may refer to: Arts and entertainment Film A-1 Headline, a 2004 Hong Kong film (English title: Our Man in Jamaica), a 1965 Italian film A1, a 1999 Syrian film; see List of Syr
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 0xea4ab080a67ca0ffea8bfe5014bf4f74e3c43bc4c614d27bb0117a27c182714b. 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/c52ec57b-342e-4ac4-9339-8008607bf5c7.json and https://artists.proofprofile.net/proofs/artist/c52ec57b-342e-4ac4-9339-8008607bf5c7.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 0x03838a208f3703793ff3cff99a1590d97c1fb75db9ee1bb583934c648ac13853. 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/GBBBN0102623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38762ec2744b083be000fe266ae105d80c9f9e954af5f4a6999113f6599f3990. 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/GBBBN0002274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c003d11e139b1ceda4270ea79fa8363840b24b68165c44e675567abf9d9384. 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/GBBBN9903032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670eafdb628e1d8741a39f3b31f2500182db2bfea2846c08ced857eec0a2fca2. 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/GBBBN0202081.
Nos Différences (Caught in the Middle) - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b185d7135c2d56ff6d74b775320f5ada00e786a7e8c6d8100716449360f278. 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/GBBBN0202227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805c68365b95dfa5bf9c3bc85238080bb8e7829ed14a7e314af380a53db90b1f. 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/NOHEK1210040.
Waiting For Daylight (International Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b1645a3cf322b68f97e0354db607a22de043c201ed4fad2827aab902d1a927. 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/NOUM71200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda468a9d08b5a2c27ac8eaac68ccd1179be321c4affe854936f35f54b630c339. 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/NOUM71200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03838a208f3703793ff3cff99a1590d97c1fb75db9ee1bb583934c648ac13853. 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/GBBBN0102623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0003d9582a1f5888605a09bbb7b6f5db53798200853d6303312e52dab9356314. 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/GBBBN0202052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4f553310d44b7fb602674f628ac9732ff8801c996b505fca040661b3ff8a62. 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/GBBBN0202053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd819386b64d2d65959196366383cf3cd41c1dce097562e1fb4e85b0c16bd9c59. 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/GBBBN0202058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaebf48253d98164634825901c6143b0f7d5106d78eeb6af39575b2d1ddcd84. 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/GBBBN0202056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a2fce972e771a436a9fe613853154ab2bf104f7bb8c723ca4e242a2e273574. 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/GBBBN0202043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdd80a411a51c22a630a717d3ecf71f3e375089afbd22ba4134d0fcc51f6dd1. 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/GBBBN0002273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb62db4be957ad164d599283e1710612f1f401b3ee909d02968e506eb53ee64. 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/GBBBN0002268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59908093f044b0a5624c240688ab59cbdf697eee950f56980e8c00f26da3354. 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/GBBBN0002271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef45096bc409e6b1d8236246e4e681e278de0af8cfd94e49ab0141aae23d01a. 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/GBBBN0002272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2099d017e08c1f23aa91aa311542e9a8442492fa1b362a47b37e5d6d93f545ed. 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/GBBBN0002303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cbbd2a5bb358650e1965ba983fb88e365ae26305847b6c8ce1e50ce2a18b8a. 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/GBBBN0002267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8576e137f4998711c93915c22aa7a69a696cb2a5a66415ab9a211089000f095a. 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/GBBBN0002293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c697001878735722920ce4812e6ebf89bfb25045676e6e7af5e62f8207d6c8. 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/GBBBN0002294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9ae01a0bf509c7f235b0e7d273f358d4168cf7c23f94028fca6a209052f4c3. 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/GBBBN0002266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b1b742f2480035937de6c1fa0e812a6c0bb7756ca6b97c2b76d10798ab0b67. 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/GBBBN0002269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa392527f1f51eb0c09135cec514553a867280987dcbb956dc89cdfed7f3ef10e. 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/GBBBN9902215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b06c2c165b1bf5b28d7a1224c98f9fdb1246211f4017fe78300137fd2ab7ec. 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/GBBBN9902217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146a24ed5a22d08426afa32a39398339857a68e29bd9e07d080188c234b6cf2f. 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/GBBBN9902218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c622e34090b207cf97b6aba71050fb0b9ee0a6748d28913d98c966d05bd69b2. 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/GBBBN9902219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe01a79feea6642901947ad81c803ccaa730f3d7f5256b14f2e8784735f8d5. 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/GBBBN9902221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f17d7dec7d255aa8a27a16f708c83e95dbebea8281501a3ddcdc7fcdc2689c. 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/GBBBN9902222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bef8d116a48b3bb3cc952e754aea303a57f24a4280ebfdcb1e90b178ed1d41b. 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/GBBBN9902223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e14067ae23a3aa2dad81653907e48ebb782aaf9014b99f2ffd90e4c8142b7fb. 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/GBBBN9902224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd58a356716280bb9e5fb7308235cf7cec6051efa95cda1aec388a96d7eb7ff. 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/NOUM72300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f79365ee0af74bb2ccdeb8fdb0d8ee6c8cc9ea83a172d79e6b656d0e9422ed. 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/NO2WH2305010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aef6aed97a1948e01f12e54cc7a5db040ca35b506832247ff55463701962df7. 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/NOHEK1210010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b06c2c165b1bf5b28d7a1224c98f9fdb1246211f4017fe78300137fd2ab7ec. 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/GBBBN9902217.