thumb|View of the Entrance to the Arsenal, by Canaletto, 1732 thumb|Cannons and mortars of Napoleon's army exhibited along the wall of the Kremlin Arsenal thumb|The Royal Armoury, Leeds thumb|Armory
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 0x79331e92c8de1f46635f759879622385790b03d700b8223d1057f9cbbf71ef06. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61766d1a-8963-4dac-9f8b-f4f3caeb3949.json and https://artists.proofprofile.net/proofs/artist/61766d1a-8963-4dac-9f8b-f4f3caeb3949.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 0x397da0b03d7ec84fd5cf4a3a94169b6e2abaecd65108d14103fb8e586f4a9e2a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BEA990500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1433fdbc9f56209cdeeefdad97bcff286f49e343f2b84e95f14128c272bef7f3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BEA990500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881f38a4118b895eff57e88beac57dbb4ce87fd432c0f944a29f94cb62d2d903. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BEA990500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04708c567923f29c7bfc096e6fb5b350cf67352622b7479a03fb6bc38b9a1c08. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BEA990500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee12d508fa597686385dd77eb796f9d72a478736d04af09eb12df024f6fc2a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BEA990500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd502dc68843e9742c7735097fa5d9c890f370604b03d653c570900be9e48a3ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BEA990500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf2f87ed1a069805a7e324e0ff60475b5d438d8836d21e59069e7639f929551. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/BEA990500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd70345cd11b3a900c202387fbc7f7f6d4a28505d3b129ef506583518bbdac9f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/BEA990500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab015c19e36583f71284e5e6d94ef457de9eb302ed8832144d5e5d12d93dd3bd. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/BEA990500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa052fab99aa1083b63451ded0e3f7968715db7b9fa18c1883e17ad8797793673. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/BEA990500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd19a5aec2d295c959e183a89ab7d1af4a60e200b2d118f82e504631819cc04. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BEA990800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf9865cf3ec75d8203509ef32175fc5743ee2261cc7071275da137d21cc3f13. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BEA990800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb261efd942175c9952b9b94c6912dc9a6ba116c7af7005be08f63be7c0628dd. 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/BEA990800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabde35293d0ea2067f0bca76b8457b2e30ea21837d0ad02bc0c9e2393adee306. 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/BEA991100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4112150c18a5fbcc4601e26f809044ca44c5670d7758731c74cc2849c172994. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/BEA991100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f14f6cb4319539a1b3355cc542ca059b38af19cc74a18d192a3bb78056db9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BEA991100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4621b502263d52d08349a21f7b470b1d08d85f6efb35161cc555605c6581a3. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/BEA991100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c85cfb71c0aa643924981a78150c825c680caf63b6a7abd5859d4408957bc9d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/BEA991100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1500efa10c6b91aa1f688743255ed7831d4c3a677bd52aa8167f55da11a30409. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BEA991100012.
Saudade - Marky & S.P.Y. Remix / Zipper - Crystal Clear Remix
Black Mountain (Beautiful Love) [Radio Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699b8a9c066e20e285f4a43712397de91e2afdb80ca7bafc60f94bdb353be9c6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BEA991400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8eb5d079cf8d4ed885f75ada6d66803d650acbf4636d2f55b0079c522b6ea52. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/BEA991400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b47ea55458f9e024d2c7fcfcf04c8a9ff3115b2985bf98f772098bd2f41ab42. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/BEA991400008.
Temul (Lie Low) (feat. Lydmor) - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00afc0f3f66aba7d7f019b2649a0bc32291ae8b14df4a51c220f4f34b8133f76. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BEA991400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd63b84bfd0ef6fb7747c4ddfd26d3b0149b815ce1ec72498da404cb8550aa. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BEA991800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae4d12a6d47ebfaf6527be878c596da9ab0db6e7995e21f3b6d61fa1d00a2ad. 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/BEA991800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f259d8a2f56918e57b82e696f12261330df94d3c19985d9ccb707bd11ade6c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BEA991800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30fd8365fb1a52abe41da71e650932d0f31996e5360b537b1a467a7947e6536. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BEA991800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab7138b36095da7a3b5c0ca826dd78b8a621dd88aeee5e39ad290416179eabe. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/BEA992100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea600d2d9583b446dd72c9dcb4bd28aa662fd7e3ae233d5fd1c19cbe1d7bea26. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/BEMJ62300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d93e22d28c4990513dacc9e2e722402029ab25f101d766441e564da586f62b2. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BEMJ62400016.