ATK may refer to: Companies Alliant Techsystems, an American aerospace, defense, and sporting goods company, now part of Northrop Grumman ATK motorcycles, an off-road motorcycle manufacturer A.T. Kea
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 0xcf41004e95ba2a8a356a183603e6509388398b8fb8cd52b5c91c2ad09b0f9bf7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22a369fc-a731-427b-a07f-464ed4aec998.json and https://artists.proofprofile.net/proofs/artist/22a369fc-a731-427b-a07f-464ed4aec998.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 0xf34921b7db1c459ef5a216048391a78ae31501269074b10165fae5fc71bb5ed6. 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/FRX201705276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911ca935db62b4f92cc4eeec1fbfa250ce9512880883294e0c75361e4e94d199. 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/FRX201705279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f715d33db9dc1e0775940346eacff8f6b75988280ec0646108ee8d5b778878. 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/FRX201705280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74566ec600a155b8b132a737ed6b56e6c81ff61feefbd81dd0ac7f54802a1d8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FRX201705283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44bd7f66eb6551cf11da10135dad92ac64828e72eab93e63e17685b03b57833. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX201705288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d171b2451c635478c82af707f72e266c8a40066726cbe249c1726c59a6518e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:30:28Z), 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/FRX201705293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec96e3ab80933e43f9827544d67693c15a90f15c62abcf866dfb67cf2a127ec. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:26:52Z), 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/FRX201705277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb09db4ed7497f0df22e0e1a3590b3063740e95838442f6ec6e2f41c6fb9dd5b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/FRX201705292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f02afff97cd751f1190a2c0859c494f0934ed382bb05c54fa522a9d5f1a03b4. 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/FR8GV1831040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b7aaee0a7c8abd58846f5c83864819761208e1294b3efbb3a5b5cb90afad4f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR8GV1840330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5d0f5564f7c86104d300c1caf23554add2c16d5b90b5b2e0ea836a5da0031b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR8GV1840440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d76541839d1c92eb679ced9d01e3434becc47a3fc5c0641226f8bca851b9120. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR8GV1836320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b62e90e4faa31688df4e58b52d2e9d9147d24577998e8f7488992f5d3756161. 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/FR0U91204074.
En Roue Libre (feat. ATK, Gwenzel, Fayçal & Tupan) [Cuts by Dj Venum]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efc290d0622d72461170135024c3da321afd2a84381af36bb95c043765624ba. 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/FRPI32200154.
Classics radio spécial rap français, Vol. 1 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd854dfec786fef92bdec007ee4dc01edae187fb5f43fe5a1683ddf407f25e2ac. 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/FR8GV1922860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe148db53c383decaa1096ab8c1a9b6431b2388bd9745e475f98341f5aedc172a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR0U91401156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e2ddb04ecb963e387f28e410cfe239dac51bf93a6c5dfb507e69f3d0f3ca15. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FR0U91400860.
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