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 0xb5baf1c6a4a473d7f0a0b726aa59cf25f9199a88b01b8cba9edf895651efdd0a. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80456bbb-2acb-4b00-b040-c09927c2cee8.json and https://artists.proofprofile.net/proofs/artist/80456bbb-2acb-4b00-b040-c09927c2cee8.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 0xda576088f69ea1dadec82048dc5cdd8218839455faa6d44b5f4d5433fe1c7414. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZHN62538531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c4f00b591766c3773af7df4e02092df8837622c1b0a5da8ae6ef73e0dba789. 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/QZHN82508263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48fba2dd1a755329790725d64ab843a2441b702f21b63e87494f2ac33d854c9. 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/QZHN82509556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e77bd164aafcdc5c3a087b4885ad3a673f6008632a58bee91174fbb61fb0fe1. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZHN92573854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e44a24bfd5c1f2c2e77ddc612432a7bf497561681dcd8ca0918c8024bcb075. 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/QZHNA2529522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d8a2b75492b039b8e9dca31008f3c6660cdda933ba8628540e08d39bab2470. 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/QZHNA2573245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e2f0d2dbc5eb6d91cb6ab47eeb540e4bf162072974daaa07853f0e92ba7160. 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/QZK6N2517091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7e1e582b1c6ac86874fdcdc571d8b9f2fcb55c26750f02c48c8e3d4f1551a4. 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/QZK6N2554355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aee45930abfd4214bdc5a53a0ae0cdf345e7798d6f9585882d7fc17a74fc33. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZMEM2509596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e4ae55d02fa732b028e34e93228fefbd16989e3da3c66c901c323f68a41b61. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMER2584089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7154ce69b8dba19da7afe9200f4548524061df4c0a444786217d0931bfa29bb1. 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/QZMER2584090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb5403a4cb98fc95e458633be65f3165531c55ae57c4255c06b4fa7e4bbf8be. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZRP42507070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f63d332523939fc85a78c0a6bdae26d88162e54bc01a648787f41d78482474. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZRP42531042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb701d4d95dda6fabedffe386c84b8eca45ec0a6d8cb9dcd0001cc2475028c522. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB52584078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9520f4873ee44a4a8144b93205282583a5e796e92d73719f3606a2e64a9c2115. 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/QZWFE2523531.