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 0xf8d5642eb8d7e51735885cf9d407fed0129187b8e8a6f9220fca4b344d0c2f55. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4408a877-448d-4014-b4a8-d8d970816f70.json and https://artists.proofprofile.net/proofs/artist/4408a877-448d-4014-b4a8-d8d970816f70.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 0xafcf917aa1356809b23a521610823a9e4422d21b6803dbaba5d3ca5ba6ad9b54. 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/CNA650776509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a232a25f8372429255c9deff2c4145ee8de1bc94a820bbf63400557c0491bb. 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/USA560845055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4528c2454f40a02f70c73898cb21fce1cee49ee563f73cb4de91cc5bf378295d. 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/CNA231501656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a35d5447b18a8b25f29b6bec9a1177a22bd5f3cd3db658eec6d5e5704af9a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:54:12Z), 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/CNA231501625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4766e97567c89443813a5ecc229cdc548612d6621af5cf3b5284c80d4f5cdba. 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/CNA231501698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7addf124cbcf20b7a688cca32780af8d714639bfe373578f09749c4d907a01b. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/CNA231501678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87313c18c886713275121773768e2255bb1fdc212d34aa4c158a171ed0392f52. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:29Z), 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/CNA231501657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a35d5447b18a8b25f29b6bec9a1177a22bd5f3cd3db658eec6d5e5704af9a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/CNA231501625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc359165070e33c82d29237d3c76896fc56e8cd43e6f5e7c0d456d4c9187ede56. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CNA231501676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d17f8b9dfb0982e8467927fe91f169fc8a3c7fd23f8d7b27804ba77ff94975c. 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/CNA231501697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c57ef76112165f04a709fe6d22e9c458a6ada95b51383eac5c76cab6c0f69c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CNZ682500407.