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 0xcc097e9a22f385e9998160b81089963e30d312eda53d939bd00ba377ec946580. 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/7171f316-2c30-4ec0-a44f-bfae7707c3e2.json and https://artists.proofprofile.net/proofs/artist/7171f316-2c30-4ec0-a44f-bfae7707c3e2.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 0xd9c5ac5d6a4fbdbb7a2513cf74c162d2689e89fefd288fd17a021c1f98b9f58d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BRGPA1400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09516874047fb3fdbe1457c1dce743dfc163f64771294d8ca079cd191995bcd9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BRGPA1400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde937f03909d942cf7ced2ddacef71cc865e3da4c647180ffac6a1305effcbe4. 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/BXGAJ1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb460b77b0be6911bc20ea0f5cc2440ebb7aed15ffc95d017cb54ffc495a8d91a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/BXGAJ1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e1b7a410f28650b82a040a007b5d456eb0a21ae445180f9695015af859bc6e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BXGAJ1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b08976939f93c3e5054792cf072c2b8e17c9c3e7bb273d9a0040e972bb75a03. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BXGAJ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ab86e14cb4bb6637ff54df889ad02b8beed47316ccaba0ca3aacbb4d4e6385. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BXGAJ2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b4ac00ad97f89627ae50f89345e9c045457091533947fa991af78404afaaf6. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/BXGAJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadae50269f8c7f4e8573fe66c9ba7c129fd0eddc2157c4cb61a867460ca0d3a9. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/BXGAJ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43071cd2e291f67a7da45d77bf1ec29a6e3643c4498be8e360906406c4f96d14. 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/BXGAJ2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d05813fc727222056d7d27f6f39f1ca8124c71bcb9b1029f0a4d3bf948f56b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BXGAJ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ed7a19939785f63b534210c854017adf4437a92b4a661ae3ca6b9bcf0aa9dd. 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/BXGAJ2400003.