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 0x91ba135b66e643d1b8fc7ef50de86cc523293c0e741974fb052d32e6c90c529f. 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/0821f327-184d-48cc-882d-ba2ca91509ad.json and https://artists.proofprofile.net/proofs/artist/0821f327-184d-48cc-882d-ba2ca91509ad.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 0x6e6c4986a15460e23c81ee7311599537bf4eb67305fad6eab4e82ce4d2077e38. 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/HKG732405472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0360d2add8cec1750bf4e61871a7fc8d6ad43c34b8565bfc8de085c96515e634. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKG732427219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ac549b09fc03fa241addfc9a933a7ee0afb86117e6846f509e924ffdb4e89. 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/HKG731720151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcf0d1abd7ee7febb14e7765d3b1880fe6aa68eeb3e05031967ff37e2d620f9. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/HKG731602685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ae0760634d1294772c7bc62037c61b0bd1e6c41275d1ec29df3316b890c0dc. 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/HKG731602686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4019d5623fbecd00b59e268bdd978cd00c13d4939c682625d8b6d14af79c12be. 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/HKG732366041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9a3e7a3f1dbd05f424e80dae75b3e1d61cb580dd8ab34f2366b7705e7fc1e5. 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/HKG732360226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfc3c8f61e9728ccb69b03389e572d2d0de56004e56d85e9b31c73f6d6b47e2. 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/HKG732341735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fe393939012c547ba748edd3520e624691c7cceabc5df5b52cb946b8ce1943. 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/HKG732327418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355eaa88a4b33e14977fc9a2f719b810a988c04aecdeec27de5335bdc5976d98. 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/HKG732299177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19455e1bf0ec7bad6d4097db2b259a7fcb4fa1fc11ed5835b2aa6e1a1e4e2919. 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/HKG732325580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed40496e1ca8d6e45bf9ef615045ad7060343a842704106d7aec80caca2e75. 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/HKG732253955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f51a7edb512e7aaff52833b859c9ac1a01c7dde22bea38797544c4591a2c2bc. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/HKG732245120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c105d479e4f4238d2b389a2f25ab46c5ae976b7423006fd7b66e3433420ee. 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/HKG732294138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dffe925f843f6dad418a28d365bbc32fffa6b26b1b2f5a8f5bc962746614326. 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/HKG732294140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a1271b8936757737f2e68891619497634b804cb50f5653e06ae42ee1c261dd. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKG731753216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3cbdad068fd99e3dd518fd4658d8759267636359bd0c424681c65d75279458. 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/HKG731728752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ac549b09fc03fa241addfc9a933a7ee0afb86117e6846f509e924ffdb4e89. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG731720151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c86896d89253ea96e12755ce21913865869615d50518ccc36c9bb801e4654e. 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/HKG731720149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201456b69a27a177de3a781f20c2ec044aa174fe3c7f6fede55a8b49492dcd98. 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/HKG732122428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b88ada51a148ec46eb26a0d56b459abd9a660db89e57d09cd293e0fadce6eff. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKG732127524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb581a9b24d7d328d7c6ddfc6fe00d7dba1a3c8908f35b9440f20cc24f6585. 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/HKG732026647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07119712725a32a1e8d71b184f3111e0adf2bd65b243dabb2a1a0bc81358891. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HKD012204562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f6a38f0570af616a610c0fa43e0b9627e9c35e898ce74ba6fbf52bfd7a91a9. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HKG731594479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59e382cf7293b537fb4e03860c565cecd27b4076995a326747f6a3a0d47d3f2. 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/HKD012204549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19ace8d720edde7ed6f308b521b9001aaf3c7a3546f6a01d96fc5dbdc8578eb. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/HKD012204552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719d53e64ca731bd06aed5fc547ec00adc3736fa0a321d97866dff9b64c99f5. 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/HKD012204560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cbb110a514e0c1d3c5adaeaf0b4d4c1be312f286170779853e7dfc03e5de92. 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/HKD012204539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c4f79a69d314825b4c8005833fefdd3d2f0599d100a3b48fd5ef3a1013668a. 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/HKD012204565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d348085927d2b7644d37e707bd34a2e8c31bda083387b8867565f20d0786a7. 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/HKD012204480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5efc65a5cf0ea04483e60401334ed5d4fbbf7ecf958a68171493fac6954bfd. 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/HKD012204538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7e32d35146685dd1c8ca2baed8ad2d9aa38f6bf5f8fb56391d9236cad326b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKD012204554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2d164fdf922892169b271699c1ce71fc0c0e91122f1297204bdbb199914bda. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKD012204557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797f457653295e7b8c90ef5df3c998c5a1c5f1509e9be0491b51ca5a6b666f25. 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/HKD012204551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1a009518e0355a5d1d11d4f5e6b8279ff1e0cf4e8dbf294d3ed5c0f27fcb26. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/HKD012204550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc87e7a18e94febeaa360420e59ad38aa7f9f6dd512727a2c3bb6b122045246. 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/HKD012204507.