thumb|200px|Andrei Grigoriev-Apollonov in 2013 thumb|200px|Oleg Yakovlev in 2013 thumb|200px|Kirill Andreev in 2008 Ivanushki International (written in Russian as "Иванушки International") is a Russi
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 0x2e35d110d7baf66c432f3d0e4d6dea1b241f6ea0c2a4e0cec0cf763a31ecbea5. 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/6ded2d13-414a-4f31-a5a3-b4157f6cd132.json and https://artists.proofprofile.net/proofs/artist/6ded2d13-414a-4f31-a5a3-b4157f6cd132.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 0xae79f1f7d6eee790881c0dcfeab79e65beda4a35f58b39de688ef48ff07df486. 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/RUA100000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82074d6320dcb4fff99301045e84ac391ea23fab0c9509f6d4056b6e8b9aa7a9. 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/RUA100000510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93e2ae56bc5831e98276747481746da2bf563103f278a996640acc92fffcc16. 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/RUA100000702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefe5d0cd5bb83a66f6e391373ed4842cd862abf71bdb8db97cbd93650d54caf. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:29Z), 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/RUA100000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4449867699563b53f339b1f1ab225ddb741e627ae1fb942a4175ea40b85901bb. 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/RUA100000807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8996e36a47cdfa3b1ef57c7dea18425c200fcb39aa040239669fd137b77fbe03. 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/RUA100000809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1133b3699689e4aa374e4267f51716a1305c63ac82e9bda0327532e965a0d788. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:57:55Z), 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/RUA100000811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8302a15725e92aa33ab9594a08d3176beee7b38eeb7ccac4b4ab09f562ab96. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/RUA100001304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb21f4e4d7e76af90feef0b9074082def1d533c0c659511a7f4316a9f007fb83. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:53:59Z), 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/RUA100001308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33940bcc92273bc390c15e384da1b233f57eeebacc2033d3a36be0afe78f640. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/RUA100001309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64755c39c2a842223694dbce74e20f487b6e558dce7d29d7d9b33214ddfd4708. 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/RUA100000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e97665b76bd91f46440adb1e06f069d06835d621a70ce99bea937e4ffd4b74. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:41Z), 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/RUA100003002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d1283f80829f3bbc5ba0b51fb4104b5baaf080e59ecfb733b684df39945632. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:18Z), 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/RUA100003004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc465b95f682dd8bacce43055335a0236272fb7e5976910607276e6a5bc6884. 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/RUA100003010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c5ffbff8599baf001bd4adb014dc2582c5834c1750b1cf2acd55f328cdc6b5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:31:30Z), 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/RUA100207110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec96946fb555f95fecf583e01ed8b440aad96d3b42a048bc3470ad26c8f7b25c. 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/RUA100413202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ecbbd5497b5a10ba381eedc519d179c8d2e72b84e293889e849d7125646b8c. 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/RUA100513204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b0b46f971d3512091232cbe670766490f182b3f5709ef9b01aa2ad51b5647f. 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/RUA100513205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea6abb2f555b826b8d976d3f88c57654ebf5ef4e55b499271ff67f3575f335e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/RUA100513207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c4bcc2de5d26abd0a4a7341653a65e5b82fce5d267aeeacdc7c42a19b12b20. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/RUA100513208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ed7c8fe7e28996c2706c4dab5e412ecb46f8e3577162e9e5de74d08ce71b1e. 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/RUA100813251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64755c39c2a842223694dbce74e20f487b6e558dce7d29d7d9b33214ddfd4708. 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/RUA100000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0b4dc1951f6495c553291b0855f9469b9533d8e572bf4a8c7f557b63a6ea9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/RUA100813225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f1b2592da61a1692954e34a5cca4a4b02d15b8b220fb1778bdab764053a4db. 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/RUA100813230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1413932b3142063d6d85b0a482aeb5ac147bb11a3b94aecd876a558340cdc0b6. 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/RUA841317330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6ac307119560daf8e7f496d5ebdbb41a8509f1093f541c15caacf542754a09. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:35Z), 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/RUA841517331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72e1afcbaeb2a9620e2b50ce81f64382132f9ce4fc62ef36d3f4b6c4d8b80de. 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/RUA842117349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93d46abf542c28a2ed77f5356c3b7d81d06523390961825846b4a7138318f46. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/RUA842319211.