thumb|right|Signature of Karandash Mikhail Nikolayevich Rumyantsev (31 March 1983), better known under his stage name Karandash was a famous Soviet clown.Biography in Italian , retrieved 27 April 200
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 0x9601023935cd1bb583015b48a4fe0ee3ce762f9e453f6810e7fcb333b2dac55a. 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/a26005c4-89cf-4e79-a7de-74670053f51c.json and https://artists.proofprofile.net/proofs/artist/a26005c4-89cf-4e79-a7de-74670053f51c.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 0xc6ff073fca55b9f0c5e097e3111d28419937b729f2908f231bbc955d1a9929e9. 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/QMPU51261534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7284ec5130706c5f219e7dc4d4438513a909d67cd4d82d9acf742a8e00fbe02. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMPU51261545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace6421e2bff9e5e6608b77506ccc3c4c2870d9978e2f95f93870bcb329cc1c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:28:53Z), 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/QMPU51261546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601491cd283c37f4b9f4822bb51821bdc082e2336c40964f9934b57a836678ff. 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/QMPU51261550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711b0f510c53ecb4cf47545bdbcb01414600e8769299404ed7d067b0691c3b3c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMPU51261566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7271c6ed88755bc5930ea313c64d8216a257624eac2327825dcc0d1ccd653480. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:36:06Z), 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/QMPU51261572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83b61737867ccb124bfb5006615fd667711f0ae8f81639ab622687213073295. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QMPU51261686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd820eb603843148c9a80a147b9120a7f56d41d006d08651fb65d47b2e5ad331. 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/QMPU51268970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aef629655dfa71efb8743a4a9386711b1b485d316a33936f2f218a2ffa9b7a2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:11Z), 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/QMPU51268962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f538228a6a966c3881117e8a945f0a4b785878b1153e112d9f323734c696c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUA1D1716515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac43d10e7c4336ede95dc89ce7fae8d62599e3e44f5614295a0c003cbe5ca63. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUB862000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e2ebeca50aa8218792261ec281df469eb13b4729fdd29416c4d70d5e365921. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUA1D2069966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b80c024a6af956a8f62e5d168a0f9df415c107d3f581695977573e7883fed28. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/RUAGT2448594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4108b4417b338f3d60ac1e1ba69042bdddc93b9a5bb63af84db849530ddb9855. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/RUAGT2448596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5131247c6bb9c327950fffcfb0de98a3921cb000f799f7efa4d030b5d03cbc5. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/RUAGT2448599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b25a20c8449cfd7dd9a6f66ab31f99ca8fbbaf2db318f608dd72e4f39b211. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:56:22Z), 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/RUA1D2447908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b212c2710ada76102f6637ae85cd978cd3fe8324f3f5f852a8730b21b69027d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:42:46Z), 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/RUAGT2448606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96d9fde2caf4710910c624fb9a4e889b06a246759dbc182356d93d8893fbe65. 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/RUAGT2539376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb2169ca82313d979d7429b01e476e8c2d5e868df7753ec38fde4221f69740. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:06:06Z), 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/RUAGT2539377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeba456a03599d157bb590a7bd689420eb73d189623f6cf5c269cb644aa724d7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/RUAGT2539378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec6b612c5e91690650585d17d2513af69407a74c1de3562053daafd43d43db7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/RUAGT2539379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ace30ea9bec8c8d30e08dc62519a8016cb7afb6790c6de8da2a4e5541a7293e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/RUAGT2539380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00023336d0f1f4e31b661b96a1f6e2eac76e7c486a09f58a28a2346b2e8ba55d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/RUAGT2540081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda8bed0af7af6e4a121cf7edd192259f38a29b40bf3f8dbacf4358dfa61c387. 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/RUAGT2539382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefbbf581f0fb7fdd890a5244d0e1c45e11f591b4c26dfcf5914d01db9b3d3f2. 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/RUAGT2539383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9ccc7df75df2586d0f34567d362428acb9f9a71c59697b1197905d5b452148. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/RUAGT2540082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffcf9c414b2544e30cd9e6bb940a7285ba50f65a370e491f67b548f366c5f08. 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/RUAGT2539384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6755c652208cef4d632f768cf6d52c40bfed4412e18c8e9bb447933cfc8133f5. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/RUAGT2539385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaf6862219d444e841d582dabee383c1e9d6eeb14e0c0be943282a4bc0020da. 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/RUAGT2517661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf98af17c63f738e9847605edfe493bde283c8c0264ac2eeb96606217d159405. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUAGT2536117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9266ef848f578b90d44ae38cebfe17b5925b32bbbf763a932eef2346e6947283. 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/RUAGT2539386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba60847c1e786c90aeacbc4c64248c5519c1b2567b6c5ed7c3b834c26115126. 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/RUAGT2539387.