UDG may refer to: Universities University of Girona (UdG; ), in Girona, Spain University of Granma (UdG; ), in Bayamo, Cuba University of Guadalajara (UdeG; ), in Jalisco, Mexico University of
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 0xeb32bbd7a3922625bbf316a97cbd4dd9e5399569fb6e7fa712d2ee1ad6a635ec. 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/fb4fc288-501e-43c7-b4d0-8c34b67e0d84.json and https://artists.proofprofile.net/proofs/artist/fb4fc288-501e-43c7-b4d0-8c34b67e0d84.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 0x26739a0031aed5fd3563e87d00da213a3604b0982f3bd7bcc80543072bcd4ba1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CZA140400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5527a220ca27162b514e520e4773b68ca3fa650299702d9c7348269e78337e60. 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/CZA140400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c09a26c016fad7069debb787af57c4279bd198eeccf3756fa1481ebccb326e. 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/CZA140400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e544eb9fb08bee674e9dbda597b6492502d26c07deb3f4f01a996f9edffc167. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CZA140400331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea86192e0f62a66f69c515f3ad0105ab005e677fe29f3c785473ffcc8e0897a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CZA140400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacc13d51f6ced09c8ad4887875dbe9da01ca46c198a4a238fda80cb7b8b501a. 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/CZA140400333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f881a23e590bfaa5a211e77adee08ec071dbf6c4ffd64e94ab004d0ee85840. 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/CZA140400334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d98796de0ceda03fe7cd04e3df91cb357c4d9a3653de26d5b1923eaa9430f1. 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/CZA140400335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9a9d83d10c5326764bd7a8baced92ac5c830428ff339790c4c28a38296db06. 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/CZA210700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077ca23d6a13a111685c4709fa386607cd06b1b338c77700085f5604721c35d5. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CZA210700065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd372d7d2e6ed0fe59495952b9ca2eb87ac9006f597caf790d360253a0e8cbeef. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CZA210700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24652e727a896843301ff41ec8f22cdc1b9b038f1b2e1e3d048ecef21dea97d1. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/CZF210911104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b23a5322447d7f9040d9486915ab1084ff488285f1e41d3ef819d6d26034863. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZF210911108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f84165152d6b95704b2afa72cf91b6c9f64099ab1247ca21d69019a21ec9e1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CZA161204759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1439ef92e98e0532a3593a58e45e5dffc91513416182d3bf7059bcf0980ccea5. 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/CZA161204762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac18208dcf08e9e9a666fd14b57405dfbc26bc1ed5fe457c25fa2f5415b2be9e. 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/CZA161204732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6fc509e957bcf260cf6f40a6314095117b8b674c005af9055b0af7d5cd25e4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CZA161204763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecffd970e7e0ba1198397d3d31251fd144dbca1c7afd9acc03776d58c2cb0fc9. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CZA231600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c108649f3565083b6da0395049e216db7c1e78646123a569448dc1fc3742409. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/CZA231600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad555dc77b4214768c6d8a09b7b322788d6966bee39d820bfd874cc5967a25d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZA231600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fab78d09a8b75a2714b2695bb540ce46268a45537bff6884d3a3f8035a9e42. 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/CZA231600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eba2bd20eb94ca331152c8490bade9c69f9448b9524e4f850c9de80e839500. 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/CZA231600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51217973cade3c11de525b9f0c12c651b123928c58fc247afc40acedfa038b42. 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/CZA231600012.
Freddy See, Zedd / No Stay the Night (Mashup)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb96c5d0d50dff5457d2e6c3fff33855d0c4a5bf141deee54fc0e3b9ad8bb46. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CZA231800504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd960272306ce22a6b5aaae7ee926954c209f06081450c53827fb274a008c3106. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CZA231800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a16d745dc8b267ec3650aeecbc068f2e6912ad63ed60bfcbb14264d773d9c6. 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/CZA231800600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0959356d802da6c4d6238a7b8f315663c46780a5d59836a8b15a4d9d5780ad31. 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/CZAJ42100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c7805c6405c1470c149f7ab64af7675a4600ac096e79dd9ac544b19d809cd1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CZAJ42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5a40fa987ffa7ce8302f992564da472466d04174c84a803d44810f8ca39fcb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CZAJ42100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d77f5acbef5e0e9754ce5b155c76a02ea8d912f91b6d5504e299a25d344cbb4. 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/CZAJ42100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f8716b7756e8c903c8385b13f797feee04a4427691ffc12b2edff43e3f4ea5. 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/CZAJ42100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693b37c5a171c313283809f91e90cf4595132eb72ac92b3f213736f1437ae77d. Chain 2 (Bitcoin): anchored in block 958556 (2026-07-18T13:21:06Z), 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/CZAJ42100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f399b472b35243c57efccbaf2dbef0fe68253e454569c2248b98aabcd892000. 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/CZAJ42100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b1a76ff9cfa266fad18c7c099f952de4d00a9b9189fee6817f233fd7bb79a8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CZAJ42100011.