Delev (Bulgarian: Делев) is a Bulgarian masculine surname, its feminine counterpart is Deleva. Notable people with the surname include: Nikola Delev (1925–2004), Bulgarian cross-country skier Spas De
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 0x11f5f7cab5dbcdcbf89a7f13fac42111c54cf5701ccaf9717104324b77b3a033. 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/afb2adb4-b0f4-4202-a7d2-74dc8ebae13a.json and https://artists.proofprofile.net/proofs/artist/afb2adb4-b0f4-4202-a7d2-74dc8ebae13a.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 0x94cef71f8fb34f3e37cb85c39449d77316e74c0d8fb2cbfaf3112a4a653bca8f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:06Z), 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/QZW9L2280376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9e550545bc9628fd33400bc544a4492230faa4adb01db2d6af81fec0c2df80. 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/QZW9L2280377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881f85b65f666c213e72c71f5d063275ace349f65d2b2f988e88888ca9fea626. 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/QZW9L2280379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e464084e41091884ec4674f7a8eb979943f3f12f07aff3cd618617bbaa492e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZW9L2280381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9dba3813ef576ddbaa208a939b2c9bded851cf0843c5f65d94f6c0fe71f32f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZW9L2280382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68834dbb05c0a1313f3d7b9b23ddf07d1152a4cca7c5a9bda82d119c725e18af. 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/QZW9L2280383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9903029c3fbd79d2a99b851561315a110bc880a1c1c44286a389688eaeb9a43. 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/QZW9L2280384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46b6d6a074b43ad4154a03df2c466b1eff64423106181cf09ad305f3628299. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/QZW9L2280385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6138eabca4e8d79da7db3503de88d65287fad9a15426a3ba366db3d31ed72272. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US7VG2376835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b73da4d507ead56b9764ada24ab4ed53fc32d7d57c2e91742912030edf3a09. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:09:01Z), 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/PT7EX2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f845cd3cd4bf597617f9645deadc9b1778c4aca6e235d6c3d36abea784c0ec8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:08Z), 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/PT7EX2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d238f0efc881388f7befb900c514a1dab3d3ffde00911e2cb98c40af23b591d. 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/MX2832443464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445a3f3dbe33ac33a9ca73967da4a1bf3fc6545a04ef46514a7269452d72e42d. 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/UKXN22506149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8701d194f079194e9dcafefff2882897b637837114592e07d2f0e03eda336937. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:24Z), 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/UKXN22506150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd24f8f69f12caf575fb411ef0676411e2abfa26f52cd2ee20a5e4b1a86f59f. 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/UKXN22506152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e502e07e82674a295bf22d8a0bf11399f833be74f2c8d6a58fcb870f628f3. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/UKXN22506153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe653cd68eefff75255837933003f6dc044962d1078e79917ec0342008aeb3db9. 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/UKXN22506154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea3622a34eb1c31334b51a75b6b3b8bd2cbfcd888162481c4956fd2bfab4f35. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/UKXN22506155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb958e7c9d3594930c8fa73ab3c4653003f03155723765b5ab32a6c62943750aa. 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/GXHAF2584258.