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 0x17e7e402cc281372c1d1bb919254c0dc9b4f37687a54171354cc0c40cffde516. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b24ba54-a9e7-4210-a2d8-9278e9b5fe07.json and https://artists.proofprofile.net/proofs/artist/5b24ba54-a9e7-4210-a2d8-9278e9b5fe07.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 0x412343be289c189cc58f7383c77caf387c0bafd30b444e35180952badbe2c2e3. 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/DEZC62348626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4a5d23ea81a0360c9f04b36ea3d5f3270f5ebc736f25da73df750d5a80d90f. 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/DEZC62348628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5459ad511ac8cfaa5ed05560f9f4491cfc830d7c311e52424dae5c7ed314b3c7. 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/DEZC62348629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b637663c9876f4f1f6419b0439a54407ba2d1a590d1fdb3699347e89ed21496. 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/DEZC62348630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c0a1663f24bf75251a2d78a8b78c50a564be343af7c3ec0b23cdaeea09df16. 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/DEZC62348624.
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 0x8c34149acd23156268d3310749a811db3cbe3ea5b399c8906c125df9f0649a72. 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/QZTBD2415086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057c4029f33b8f7eaf5ec553de35a05e53507471fd8da1c92fd3408068d96ea9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTBD2415092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900b42b3115286aabf6813036c27f7541f069c21e78f51ce1534dda104d163c2. 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/QZFZ62525902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33759ff911c2b8ec9cb17f0feec20ca2b11995c3001f1441b818b39403f1f6e9. 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/QZFZ62525903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11555be88ad9ea38a53342b0be101e9b2468f90727f870998a0c295ce67b3b45. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ62525906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1467f40e53ed12f401aa1d49e7604ef3da6306332311bfac4d7d5ea17fbf7fe8. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZFZ62525910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef1a9c832aa3f8c0ce93124f47b118cc89edd9cda4bc9c527e0e4cc6320d27. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTAT2583201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b4f7d5f97f1f554cb72ef798d707a317b9e7a3073dd3c6b22c1eeffce32851. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZTB32540443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a5e8aa857f75be4e8379e5dc327b087b925607abac55c0fa0151cd87594658. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAT2581821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1129383b60645a5e8aaf61918498a3874e95183327fe18963a7d830f11514ca. 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/QZTB32540445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef1a9c832aa3f8c0ce93124f47b118cc89edd9cda4bc9c527e0e4cc6320d27. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTAT2583201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbe336e99d7b883d3de339dd19a163df55ceb5b46fcb9bb3d02ce628aea963e. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTB32540447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30897e7783c93d1eab54c742ba96a02477b1665da88185bd319121cb3f9515c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB32540448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc167de0cb4ed3ef7b9bc52388c96242998fb74c224e1add41a10de52419920f0. 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/QZTB32540449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf64daf73a47b3838ff6905a83c5b0a261d1579dce9e72ebdc6b7a093df917b7. 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/QZTB32540451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79482a68f044eb44a7b0508d2fe4abcc311e3eb7526368e48f423221b2430fb. 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/QZTB32540454.