ZZ or zz may refer to: Businesses and organisations Zhongzhi Capital or ZZ Capital, an asset management company Živi zid ("Human Shield"), a Croatian political party Games and sport ZZ Leiden,
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 0xb6466be63c1791b5fcc77817e14167469f67f37dcd60be9447ecd882c4f405be. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa801340-e792-40d2-9a5e-f4b987327b6b.json and https://artists.proofprofile.net/proofs/artist/aa801340-e792-40d2-9a5e-f4b987327b6b.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 0x9825d05a46488468379468ffbfae534d4516612e976b23f10a0d1b9b60e52676. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWJK12200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20c3f2ea77cde13cabc65599a3a303ba4478663bc0a98415e7050f2a9307865. 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/TWJK12200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3eac590747856f7d598522981b438acd0acade36dee77181ba17db7f395827. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWJK12200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d0c4d8adc6e66ba91809952cc680c1c691acef170663a7669c93af730ffa9d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWJK12200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3d629022123019bd9d72844020ccb85535743fb45a55f0c50e5f5dfba89112. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWJK12200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd014169a4153a2133adbf100fb9b2a0a043c4793801a1bcdc5701090639db763. 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/TWJK12200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80605609f752eddd2477bce3e8da9482a07d1cd16bfb9e461b50f29f3f77492f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWJK12200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdc500f7ef0911fc722912b51278ddc1d47a3f1852d082f7a226a041f4f5580. 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/TWJK12200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e14ce1a3e1f350b5e810f990c6c0f855059ce69633721c078b15a649f7610. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWJK12200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f69b4381656274e996acbc13422660e5630893569a3ad280f98bdbd04979a5. 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/TWJK12200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459db49cff6de3b1c5f0f10c7f38e52abc3166ecd28b897a391312fde32d6a4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWJK12200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ec06cce802c29b1aabbfe68fdfdcb22752d2e0e5b8ade80471866500bb8efd. 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/TWJK12200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8140c4fb99b0d6201bbf8db5eb137ea0fc77c4d012181fefd21688a5432f6c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWJK12200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fb58e77878cdc3585c4ec89a1cbe3e1e206bd0b71b013cb361c059f8f4ceac. 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/TWJK12200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc5b8dfbcf67955aef4575a21c6dd085e029b43ae0508fbd20b9cf31272915d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWJK12200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556a45ec59fda77ed9785b0965ad123a010d4f322fc69dd618c505325032c6c2. 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/TWJK12200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc948c277370d482380ade057977e4a835a30e721750e5624108f0a13156e6b8a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:28:45Z), 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/TWJK12200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adb2c189121dfda991cb8b100d2e0b105d3138c56129befd35f70d0d7d92211. 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/TWJK12200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5037054022a7ad012c9a1c5ff58014943f0aea6aab93606aef86640ea57b7b55. 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/TWJK12200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfba90a0b7c919ef4fdb9d34b543ba39d24b1bdcea1e48f5dbe906783505a1db. 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/TWJK12200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d3d706c511b66d05fad8654bf96566cf9839a0a5cc6db3d372cce6d34396d8. 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/TWJK12200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907f0a2e8668dba09afa3a680709daddc833f16f28b42861d37697b19b95fdcd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWJK12200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d65b384cab06f74f425d2db7d5b129c515e405b36ecb3a1e0e72ca60e1fb5e. 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/TWJK12200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297b01d7678c850e8e18f2e8843d293885f5f0c1c8b566c2578553f5e7693a96. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWJK12200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ad571cec9ff3ac6dbd921ab5920f949131bdb56a8442f96e0d7c4f2359f726. 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/TWJK12200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dd229e3daa2ac04e827758064d7f0dc2c0fec40aa1d01b62defd5153e28a30. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TWJK12200022.
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 0x90590fa95793bb9c224ad82bca767003a43f6192b95a11376a3288d378e43ecc. 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/QZK6L2491911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b57a0a6480e6a689f770a42e6613e2f31f766adce2fb06017a33d58864f67. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6L2491912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcc2f9de5b8b2aa29eac5bf96650759f6c3665a4ec8469dbca472d4a293ac1d. 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/TWA472392001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627ae70af7e5c356b560099b5d0054319a63946794cb34810f20699c8f30b325. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWA472392003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc926c9c1a63e07efc56807c8e1e81cbb00c4db13ae366aa72a021c4347a8895. 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/TWA472392004.
我的甜蜜沒有多少人能夠體會 - 《讓我看見你是誰》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1e48e5a021e67468ea71bc5c71340436047fb1486dd0b6fe9641e4a093614e. 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/TWA472392006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff71b7f451025c840a2e4e94ceec935e8f6b80e327e9f46b2a54a5b00e7ddcf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA472392008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571223d4b7d8970e9e313255b8644a40fb338e787f1cdf1c155efa2f45576ef0. 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/TWA472392012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786d01923bbc90390de01bf2ecf10495536b988851c5bc4fd584e82d36ef6698. 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/TWA472392013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddf17351605ee065b553daea7b770d4039062275a430cff9853137b07f67863. 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/TWA472392015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798bb637b413239df6c9c6458f46630c19bbc73dd8805277479f58aa58380b7a. 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/TWA472392016.