Chaif (Чайф) is a Russian rock band formed in 1984 in Sverdlovsk (now Yekaterinburg), Russia, by Vladimir Shakhrin and Vladimir Begunov. Their name is derived from the word chai, meaning tea, and kaif
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 0xac6c06811ab9305e2370b22d0e4fc716d817dbd7df8905bc3907756f9c9467d5. 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/482aa637-d320-4cb8-b3ad-5d8b3c40678d.json and https://artists.proofprofile.net/proofs/artist/482aa637-d320-4cb8-b3ad-5d8b3c40678d.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 0x10e4cb97940946b7f11170c5f0c535ff4b18d5354c9897ee8faea5fb5dc8aa9a. 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/FR2X41840952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b6dccf1b2e5c23639980c30a7c332a699982a24d1a7f29ed53359dd7ca6226. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/FR2X41840953.
Пусть всё будет так, как ты захочешь (сингл)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b018a9639c1ab2de5399b7fac7150fe43997e67da776820c9bb9f79162e6094. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR2X41876774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cf5b0b1e64718709015f43f3c27ea0eb69a0a62331fb4b81a006b6dacc2d5d. 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/FR2X41839967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7799d5f1ce53cca157ebc8b9bce87dd4604a013d3760ff51dd84588da24a08c2. 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/FR2X41839976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7697588f3927ed97a170ae73b7d65ea8de064a33fbff4c900068f67306b80adf. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR2X41840926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d774b1f69a2af761c297cbd4c6b46ca9c1c91993cb5c98954f84c13f540b9e2. 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/FR2X41886548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181b9d884e3051bc4e21e00f54b66b9b0f824fdc5819244c2d80b857a15809e8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR2X41869677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9abe8e56f308f1c2c0097ccefb866bbe9aff2ddbc40f82e7d27bc09dd71726b. 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/FR2X41869684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf038b780eff78b5b3811deb82e6a988f2ab6ca5e180c5ba139772b121ffbc9b. 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/FR2X41842051.
ЧАЙФ. Новая коллекция. Лучшие песни. Часть 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329665423148aa6a432ad263da09f4bcf67d0e8909c3ded542202b46b784c2df. 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/FR2X41886258.
ЧАЙФ. 30 лет (Рождённый в Свердловске) [The Best]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb5d4a08455ea56da8fa9bf422ab85d76f88c5103c5d80e83baf17c39eafb0c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FR2X41851641.
Жизнь настоящих ковбоев (Трибьют Объект насмешек, Рикошет, Выход дракона), Часть 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd6d97116c4747530e79ef9f4e15c233551020b3732f1db93443916bba05bca. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/RUB422400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176846f750b6d020e0fd8f939cb87b2d06831a1996e0b4723870b71e8b54c903. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/RUAGV2409641.
Две подружки (Любэ 35. Всё опять начинается. Трибьют)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d71af85236dc9abed54b7528948fe36fe636f893b2405b7efacbb481a0ccf5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GXBAV2122431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a702b382d18ffa77a02fb6cf26d5a8be3e619cf20de9a9d2b507102612c345e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/RUAGV2512902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113be0647f3e34204ebcf1c45dd1e74ca06e1e3dc757bcb4af0ad487be8b9081. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/RUAGV2501283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176846f750b6d020e0fd8f939cb87b2d06831a1996e0b4723870b71e8b54c903. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/RUAGV2409641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8c02f6990e7568f1a1aef4799ce9258c748c40044fad379ed9f7a9915fc166. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUAGV2514110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58968ff4879b4a97c9feb4686ba3dfdb398810c7ece7ff90e2df2d632f6dfe6b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/RUAGV2514112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd13b7cc76c25adad661227cf9b2c89ef9bb403e201917a4188e52c26c296547. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUAGV2514113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df0bcdc823cc58f373c66abcc0a1cf3484319ba083d0c188acbde9400edac72. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUAGV2514114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083fe30c63fd9c5e3877ab7f30fa2c343590486cb7320df42f3d06e312444e87. 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/RUAGV2514115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd26f281661b9cd679750f383b791ae64af6c034b64f33aa6d08314469cb91. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/RUAGV2514116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e6798ba54abbf9853baaa30778f9596222afb9ce9af22331ecbf19e52fd5ae. 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/RUAGV2514117.