Ivan () is a male given name of Slavic origin, related to a variant of the Greek name (English: John), which in turn derives from the Hebrew (), meaning "God is gracious". The name is strongly assoc
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 0x27cddd1bfe9c0bb24434c16dbf16b698715cf8902cab0d1b980070ac90702b51. 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/9750b28f-9e55-41de-8fbf-11d0b74091f7.json and https://artists.proofprofile.net/proofs/artist/9750b28f-9e55-41de-8fbf-11d0b74091f7.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 0x4cf8a3782cbaf7b0aa7b6f5ad36e50d7c18c440687be1d3202abe6c678a467a2. 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/ES5110405179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a217a36107493f8370d6bd4c8cf5275e88fd59cb37a30e050caea5712187a10. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ES5110405240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c13bfc10cb0381f86d4a1f5294d569c71abafda87048767d796db34cabd91a5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ES5110002971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3efbfb3bd97c7f22c304cb3ac4fd766711a4ca29badfa4319e9c7983ecba7d7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5110405280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe486c7a478ace0f91a235198264e58d2cab26505eaca121485e62f3af5f0247c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ES5022100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e63f0b17a6a334dabfada26a23bf898440bc061ab14a3b50d32399c2c83dfe. 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/ES5022100500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b6b4c5ad8f3a6815f1b56fd949bae2c8719673d3a8d9619a80bb7010902f51. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/ES5022100423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb719ef30d0d1f26dd0819ebc6e5f4df6bdf52455e62f51a2bddd0951076e9f7. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/ES5022100487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c3d0557a3b6e206e08895e0766bf128c750905620c863cb965c5b5f609aa74. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES5110002967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a06cc2b3979ab47ac89cc9740e2cdc53091c6e3dd03e127927cee0d0566a43. 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/ES5110002968.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd21978cb87c9fc04e0922c0c636aa16efe81b28dc34a2a6f0be178919946c52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5022100428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42764cc942de29ed8c3a034c9d09f5cfe247180d123e293402c2259d3a4386df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5119901946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa574d58b5811a9d5f4137d27bebc38858a6aeb290f9218fccc112dd88f2ae78d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES5110204296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b0b5010ebc88948aba8c86729e851fb87151626e81d1e519d97c48c24e345a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5110002970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa574d58b5811a9d5f4137d27bebc38858a6aeb290f9218fccc112dd88f2ae78d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5110204296.