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 0x436732fdf5d1258b4209ec876058100b2ce8f14926ccc18c3074d8bc2522dcb5. 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/d91dc8d7-7634-4724-929b-c41c8ae2e723.json and https://artists.proofprofile.net/proofs/artist/d91dc8d7-7634-4724-929b-c41c8ae2e723.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 0x9f3038d71e8c49574beaee30c1b290d938183e76ffc80f6de0924af181749c4f. 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/DEWP51800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af809d7a69339bfa335bf7c5b891def64c6ba972a2754b471a65fd3915a5fcb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEWP51800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfe34f25b64bf4fa25ca65f450646c0a3f09b429337a02ec8b775cac622e3e6. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/DEWP51800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7f8a94f57183bd20eea0dbacc8722140ac9c376172e32cd71095d024ae597f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEWP51800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe674e0f8576c87480ae4b83482f7ef13423e248ae2ff4e2c49822bad11242fa1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEWP52100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3f32368f261b5da9fa83c4ac3212c4cd77c22c339eea7f6afa8fa1b0028f22. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:19:58Z), 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/DEWP52100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdddb303c0bf41574a1c9cbf81cea565175724585b8525ad8ba728703d673d7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:36:50Z), 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/DEWP52100009.