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 0x31df5f04e2c7a77d4a555d874b8e2a5268027a0c6263ca13756e58d5ae70ad15. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57d89fd8-5e94-4125-a675-96d051436dc5.json and https://artists.proofprofile.net/proofs/artist/57d89fd8-5e94-4125-a675-96d051436dc5.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 0xeef9a2ed2265d33c5819e16be846accc8343d3ac27a6dbf825b0b011f54ed188. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AEA2Z2545727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb725c7bb8a1f6ffddb8d44ccbdc7cb2d5d228bf2c4da85eedb0027484373c4c8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AEA2Z2545728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96964b514ca75fa22b4b6b86829598f636906c5e6e4666b20c58af83054b519. 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/AEA2Z2545729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4532cdde2b53586fe88b13f6bce0b98350bb2587802b72bc51d0c91eb6439761. 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/AEA2Z2545730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb771ff1514687919ffa2a790f7bccb066003cb9cce9c68681f4333127fbf107d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AEA2Z2545731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d46bc2997a734cfe345bd9c23c641146dac3d5e7df85f3bbc862ff2df155a0a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:58:09Z), 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/AEA2Z2545732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b9906c3434a74d6857af5304e62ae32ece56a33f842862cf9b9541cbb3cd1d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AEA2Z2545733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38f4c51cbe1c6f133e8abea03139ded80f573df688116d918f54204311ef64b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:41:26Z), 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/AEA2Z2545734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36274ba1f696d307a8decdc9ed002586fcf6bac6e35aa2348488aaf027ad6060. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA2Z2545735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03492f0f9faca2d10bf4d3d02f8ea07259d90697c4920fe5b64c7172573de688. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AEA2Z2545736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fcec865d9946e80eb6d8d17ca6793302e62ae796ebab4c297f7cc0accdb70c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AEA2Z2545737.