Vyacheslav Vyacheslavovich Isakov (; born 18 December 1994, Almetyevsk, Tatarstan), better known as Slame (), is a Russian rapper signed to the label Black Star. Biography Isakov was born on 18 Dec
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 0xfdc6201c8fdfe86de25419c3ac9bc3beb751a6614b39833bfb49ef244b2cb0b4. 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/c445dc6b-2016-4c58-adfd-2178a193c3cc.json and https://artists.proofprofile.net/proofs/artist/c445dc6b-2016-4c58-adfd-2178a193c3cc.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 0x5580ed8fc94be9452bd9f2fb961f439da548bd06f6867b8f90fa4dfe3178a31a. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/RUB631900587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3bf168ea74438760be30c9ab7d25c07d7ebc80acab6ba1c00ee938934f6185. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/RUB631900606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ec3b0dee1ece290e66fd38604a4af1cc002f74568841f946eb238268593cb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUB631900620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0906f5886561e8b261633a9696aa3353607f1660e85fe6f90f1a9b29b761b704. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/RUB632000729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073f2c418d3bc97181d4e92ef58c5f2684286abf8c21b24844922f679698ab8a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/RUB632100816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6184e15d7c080e26e0af5938c6c9202c2bd649a0e8fa46eb2f896ef4b0aa782. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/RUB632100843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8abb8f6674d0582753719243f9c2d3322df222088a2a59820b9e4ba7e382ef0. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/RUB632200869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c78a30d04b0a1c12adebab694427806aa52492be597872957bac6908b3b7359. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/RUB632200874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0e95f828f6e8d297cb016202d6a3ee76226de4b7b02b50a7162df9eaac7cee. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/RUB632200887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baf2957efc7955c8c4a0a748fa57ab2daf1aac376ce08a9b82ec6d6f7897a0b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/RUB632200893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313fbf8a3f49e501a6b3322401f120b3331f78ef60f0bd1cf8d4d2745b95d1ee. 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/RUB632200895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0150070a747f821fe28b7d15052a89ea42023d8020811083cae0bf96323d9da. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/RUB632200904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6e2272413dfd4ece91b2503aebf0b609087aed5dfb1ef8785ff123f5292a80. 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/RUB632300917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193de3983d4d69e0a4e92af647c8b5b1a646b00e883e0a3c37759ae5e48683e1. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/RUB632300948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffa5fea06513094de7e9bd2a3e86c73aa45fab7e28cb9e86af86c73263ff58a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/RUB632300951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eee8031d7fcc00d840637eae55a461cc210f86c995b4dce86e4bdbf34de17dc. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/RUB632400963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4551bb10650ac3d9b8cd0471247f0cd93f874f719d0e3b0628de8cb52c5e4b. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/RUB632400995.