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 0x9bd7de60bf363dd45ddcfc91886232d43146700c5ff248ca71f06ed18aa013f6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67f53729-5b75-4182-8c4f-689ac91b7ed8.json and https://artists.proofprofile.net/proofs/artist/67f53729-5b75-4182-8c4f-689ac91b7ed8.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 0x906e0e86a377e86caaef5560e40674ab22f117ab0c09ef56a0b10c69b38a439c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TRBIR1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f981cf271eab08e5093b88ba4cb978b73eb594c92c0e3e3886425ceecb134c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TRBIR1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9d39c56180aa01790fd14f83d5915b4f389c1d0258919218733376e0f4d9ea. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:53Z), 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/TRBIR1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c570da1060801300d2d591c722b15a743276006ca6bb72f0e7d7c93d3f9ad. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TRBIR1900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed9f00ea255a6fea9e9d2e9493d2efe9a674ca7bcbf85de75bd7594d7ebe068. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TRBIR1900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00afa1f200a5ca2c8adf6e0e1180670c62de0eb21e5cb137f532a306d6f6b6dc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:01Z), 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/TRBIR1900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2e568c4e1407589e47f306a7e372890baf8ba80142ab25aa6cc8ba2041ce51. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TRBIR1900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b9d6707bfd2061cfd8468ad02009b44458c0c65d3b7d35fa42b418aafb295b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TRBIR1900218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd6593d72b1b7764f4cb65c1ecb405191d28ea1c5a67cf52ab13f5033e2b670. 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/TRBIR1900220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194b3a777b544f834589b8eab50d6fcc3b9fa42cd3d88d2c35253a7948eac7a0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TRBIR1900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2fe843a217433ef6ba3bdac053d9ac58c1d5c3d3396583d8dfbed1b545d4e9. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/TRBIR2000705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb2a13dbb6a49944e2bb43077950769be338f0740ad41a4e4126bdbbe929b5f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TRBIR2000707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbadbed29db2cd3bc009609da4ddb5662b70c26da54960eab41a29119c34b67. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:58Z), 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/TRBIR2000708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9bc2f3bc4351dfa22a7fcb1a1e30c78ca6ebe67a80900129a987c8a7b701ca. 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/TRBIR2100964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad88520555783e88f132640304c22fe0f5d8a531be7ffbda2e649ce2cb9b3bf9. 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/TRBIR2101038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8481f0ea5dc4b7a12db1889db91d529a4ef89cbbfb590f598247930c5ab70b1a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TRBIR2301852.