Krovostok () is a Russian abstract hip hop group formed in Moscow in 2003. At first, Krovostok was perceived as a joke (even by the members themselves), but that did not prevent the group from becomi
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 0x34352f7e52c76f4857b59130ee20ab0368319f43e6a8f3b4cd16947b1a5d5251. 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/eeefb65e-2959-4331-ba44-ac93f45b363e.json and https://artists.proofprofile.net/proofs/artist/eeefb65e-2959-4331-ba44-ac93f45b363e.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 0x8b7dd7f3654947ef9371672f732558e97958209eaca6f1ee3969fb913465471b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMPU51216523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112c298d6ee4474bfb8bce6339cd0900c1a830b799f37d17822656ee34799f8a. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QMPU51216364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90f380f6700cd246e2f1b6d41ced6ea8e5a5953c706f4d9d26dae1f7b20ed52. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QMPU51216367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b94aa1b15f53e8b5f8377263a7bb09506dfca64588c9d690695a7829869758. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QMPU51216372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0435c9525dc75e053b2fda3d623656801e4663a18def31a48ebee34ac0623d75. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMPU51216373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72161a98b09e697acdb28c56d507b79b03e102d4cdc2808b3557683f6604e7c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QMPU51216344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c6bfc534a370ace5ec599f178f1cf2decb2fe7319675b2ee7181dbde58005. 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/QMPU51216358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78abd66934fccfc20b62c5026b0dfa1b0bf84d4355b7f564cf0490f1f73a4a98. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMPU51216610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a310d860421dd165293333c66c87d7c6856887add3363bd050e3d447e1f5e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMPU51260735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0f7b69cdf6aebca5526bd460890bae428f62c6e36efa8f48ec3d9cd0d313de. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:58:00Z), 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/QMPU51284029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f818d204f65e2086a08c12f8f1f6ad4b41c9665b2a9e7eebe9477b781cd9981. 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/QMPU51284032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b24de7e43d50bc359b9e369ef5688b5afb6bbd165d8da513efb4efe50a22e2. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/RUA1D1612949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29449da8324d3cad47713a7ac727a6e5a763224651d8f67506233a399acf74cb. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:57Z), 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/RUA1D1612965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffbaed403dfd834b9c832ddacbb1e8ad2a7d18b0629222be34cbd17eefa0950. 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/RUA1D1612968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9f08f82af40a00be1e62bf46568116e01c2069d287b7216c31cc58eecdc11. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D1612954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca7398074368153b4308fda585f306e315440785232f9815d6a17802a41e3ab. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D1612963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4a0a8e3ad5ee678412c2950423716b3b1f7939bdd11919f5d6d122aa3b22c1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUA1D1612959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3509ee08f4ba240191d81b1250ef9c2e9b7d50fd5d743d1eb92058b50d08ea2. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/RUA1D1612953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc948cc1a99a962cc5ff9d4953af1a90e5ebd4ec95603f59220dd90f4918019e7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:01Z), 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/RUA1D1612962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73991aa212c51a14e62254babd3e69ca07c312a494431e83a94792171d64d5cf. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:02Z), 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/RUA1D1612955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe646e4fef43043f52b45d129782d3da032680820d85e37b08b653e346874b7fd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUA1D1703544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b49392e8239cb11bda5308d4aa69c2ea6afbc587831a1fe34a3b5c72c0231b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR10S2187407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ba0267096027770bbbb8adee38fba9f44ec2f963ce1acd51c7b21b59053c5. 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/FR10S2187415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cf1da27255bf2931ab880e5e38833116f35ff4c81b7b29ee8d4dc4fe08746d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:21:03Z), 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/RUA1D1806595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf221441f5d4ee7982a14061246a1a21364d46dae66db77170692d0b50721daa5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/RUA1D1806591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf16035dee4d822774e764cd6892adbee5aa5abd748176c8d60b904447d7518c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:28:48Z), 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/FR2X42090643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3050aa875d5f1b569fd7b459bcf7ab016f3d275567b4e10d59d8850ee311e2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRS182008946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f3e5be7591c3ccdec92c15d48c588f30d895e3f926932f075b6d1b5d140cd. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/FRX762342690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb870e257e5a99bdacc9d5f26dd90514612211f375b2a7775edbdf6a8dea5de1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FRX762342691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c9e0982405d9c95614cac8944a63f4f2e03a541e461282fb1e5cea8cce03c1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FRX762342692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6e2fb9529e7a3d290c6e4f4b4ec493356192ba5c2adc6010853fdb8dd7fcd1. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/FRX762342693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fb76ceef7e2a30ca92a99834d33720ef52c081bde0ff946f00fc2d97ddece0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:04Z), 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/FRX762342694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd068b29b50fc38b958685946b5aee1ef1e653353c4102739964254a97d866c. 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/FRX762342695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0e3bf2a1094a1fc83b5c39b20f845353fd91481e91076e0fb7535e4a5d7b62. 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/FRX762342696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d0f182f5a1265bb7516a07c9df023d28557255585ccf67c5bc4628478e86ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX762342697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160d87115bd45c03f140202197bbb4144d37f43710d62599cf44eab3e959294b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX762342698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b005000871ea703083bdde1747e2c4bfacb1b37dc6a9c266910cdff256e280. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:27Z), 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/FRX762342699.