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 0xa5f310481347e3228bed6dec50de7a0edd7b6724e579932422994ec0e96afb97. 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/dfce05d8-7e09-478b-a799-4c0b23915ed8.json and https://artists.proofprofile.net/proofs/artist/dfce05d8-7e09-478b-a799-4c0b23915ed8.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 0x4981b63838500efe12860730d14d93c5b7f386555a17fc308e9a6880ddf278ce. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZ8LD1954108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d92b83867c178b390848f8b716d017ecbb708b3e7bb8fbe1a4dc7c06bbbce55. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6N2041137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0445c4a8386626e8999a6b5d074fdaef2c6f725623f22c3dfbe73bd66a5be687. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHNB2257538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108d1e4f0e735c6d256c279254bb6722f4fa2ef90f70939b3baac03024429cac. 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/FRX452354327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ed56a6b774e522c57da6d0da1b0320f49bd559c7575ca857bc69027355cfb2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMHL2205037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec68415ebf0f7fe5088a9fb214353cbadc080bd526810bc8667b60cc65e7733. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZS672418798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63b4f9848d64a0bd2eea9910fc15a46a04a856a91c529259fbe3f759dec2e8e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DGA0R2499215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb63b2689b23135dd4a5e5792818f47aba27a70e36930b84401f20120dc87782. 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/DGA0T2451378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa9e9722ab914e06499a3b824fdd3c47b47ac24bc9ca453ec37b3307f0e702. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DGA0T2451374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4cbe1bf5a0eba86d6a30f9fff649d23935fcab61fe6d2df4eaac1b51c5a37. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR10S2568491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6aa548a1850d9ef2a2f6dc2152b15cc24f39a2db52eae5f8061616b4f6a824. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMHP2517467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36d38539ab326de75cc43dccba5f5c5e5edaa9c1030f842c6f3a666b7b6625c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR96X2584880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420c0d45eb86cccd023d7cb533b2f562cf8aad42c3cabd6ac2cbd0743fce1764. 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/FR96X2584879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0fdf0125c4323ca0bdc8eeeb262db132afa380f2114ff19f76aeed7f9333fd. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FRX202594638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1407f701bd492a0b093f85454031be131365725840d1930c27627bb2273431. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/FRX282503529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ba6b38e7357de14453c46fc421575ad535a8ab161f61c5add379ed0e49a9be. 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/FRX282540301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894dff0d9cdd0d9367252ea2dde0522f02c7604ee444501e39b35881f4edb6e. 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/FRX202523559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5059c151a89a6475cb4c2cbc0557d6504e8fdda1e05a191d433405fe416a25b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX762570274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6982d8683cd2e2ecceab997a82675a9883dd925a83b416051a1c2e4f3d8d77ab. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/FR96X2584877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8941158c566cd65586367646272a222a883498ac270922a62014b66419f82121. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA052543113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1145c06b94b2a16d0b3cb08b7fb52104b19a27532797211fef96167774872b7a. 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/DGA082241054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517826bd0eccf87403361256f0afb2820f866a37100579898991a7a6051610e1. 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/FRS182158171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91009f9dd906c9b0819d31c0aae42969c5fc93861bfa174d2c12f7e34d4b0e5c. 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/FRX282314475.