Ziv () is a Hebrew language word and name meaning "light" or "glow" and may refer to: People Abraham Ziv (1940–2013), Israeli mathematician Amitai Ziv, (born 1958), Israeli physician Asaiah Ziv (b
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 0xa81fd3e8708d7a77a9f56c3a40829e3010f58332c27e8c9ec35a0ca6ce6ac16b. 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/335273ac-95d7-4ad1-bbdb-86c0dbe74574.json and https://artists.proofprofile.net/proofs/artist/335273ac-95d7-4ad1-bbdb-86c0dbe74574.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 0x638555adeb5b03eb3ad1209590b2bbb4fd24dfb187b722ce0a300d9db9b779e3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/HKG732376986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4e50aada4bd7b501a0356703b7995d552f3fb716f2f4808bc7d624e8f78be8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732261931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829d484dbe552ada10107a8d1bd206c17927721465eac8ce4b3848bec751c40e. 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/HKG732122676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07bcb60bb099d68f9d3da780519ad79ff5ad147c47227e9c19af6393925204f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKG732122678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e50abdd5a6ac0069f2b293136cdf202fbf149633cd6d4530fae9283e18244b3. 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/HKG732122679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e333a0a2b4f26739d9447596c311c9a219fc1a4031614f432cb7e4da8edc7c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732122680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6413cbf1bda8b7b6cc66684371ef14de129229fa9a9797395958b889b9e11077. 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/HKG732122681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc695bfe8fc29a187ebc81475bf8d3da7f9cce4bcb8135799368c41267614ec. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/HKG732122682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da78fed10d8aa164975a1e42aa697cfc156addf55161a62c5c94cd1e7e723ae. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKG732122683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6513822b834c72e1f8b339b7909106b30cb9addcce0a3b4cd6f4c0b37dacdb96. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKG732460528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cec42aefcfb7ff787e5f2304b18a279e6284543b0bb8b082e0399f5d4154621. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/HKG731684083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ece183b7c241ed963129de62ec93bd95a3d150157fa8bd549fb94b1d34afcc. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/HKG732320188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21c62f36577105869f4f1d588e86e9772e2cf9e369072aa438e46c0cdcdb9f7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732292601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9820a384ef01294165402a0c7fa847134d108d3e736b06a5bd5ffb4f82e0f5e. 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/HKG732251440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89e1e6baa79fe87ee25a05908772eda48f4d36d9ebed66cec6a780464d79dcd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732261827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c82adb4db4c4eb7e365f66da7d62b94a06429e5f56943f5e1208accb698734. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732302542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dc3fbd807cc8e63d2d662778d5e7bf198833370e1647758bece325bb185236. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732302519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd7386d7b1c8b1d900567ef2c93513f4f10dd618498bfca96ee556602706a01. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/HKG732302520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09fd82ba8a7b2327a7b592a3a0ceb433a4fefdf51e1bb361f5894dc41a4ed6e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKG732113197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc546cf0fe3c95e3a059b91ed23d05ab6cf14fd0fee6a3a5b44f64042d74d72c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/HKG732133025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98d597b2bfb2295ee334d932ca43c57d53989896b63b661f4c1f440184ebf77. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG732105364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93caebf28469073674e31a4261cc4a55de11318312a855d1490fb83ede592a8c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKG742115840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bc5d92b49c13f6461cd4fbe7e4b3c11dbcb26cd3a0e4a711dd269995cadcd4. 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/HKG732101539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca9fcec86fb5a5ebe453c814a512a3903bd676fc0af3130b8dc18ed1fa96bb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732131195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef272ea1a78f98feeccc8dc68de0c17c4bd466eca6727df3c609b21735f57d2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/HKG732130111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ff02974baf7d112cf7c8def32d3030e7938f43c9f34d9ca6fc327205cea2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732029487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d9ccaaf03b2c5908ed1af3669277c4aeef7d6e6ce84f103c094a49e48d44ef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732024963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81e5fde20229920094eb4026d9363e03bcc2214b3b92e5109518ebf28a8e2fa. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HKG732013160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320119b92b28356b4d461411631fc4dfa7df8573f62d6e10d573439857210321. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732012929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa861c97f6c464d6941a18d6a77d4bd1ade57481a8a6942e723ad18093bb2f884. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/HKG732011849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdd4e1bd4b7047883653249e75a84a5d98ab3627286943fd70f0691729c2417. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG732015493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc51e13542a7f77fcdd59356670b135b6ca0a69f4ff6036f4ce05b11f07afb65. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKG732013818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3245fddec3bb06edc8fa9ce78e112a84a8c462381cc6312c8a367d6b3e04d8bb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKG732301883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddaefbdd0f01813b4a3aa2982bef5c22a68392dca22c93f7b0bf1fb12d640e4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732302588.