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 0xa72b981995ae11ff2061ba55ba708028ff73c83370fb522cee4f0f0707d89efc. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3721f15b-12b8-42ab-9122-23f0376a3cd3.json and https://artists.proofprofile.net/proofs/artist/3721f15b-12b8-42ab-9122-23f0376a3cd3.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 0xc9d62283ec2b4aa7a3966f8669bb1c62d6309840c59a765ff7ae89e920f9bb00. 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/ESA012199903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b6cf86cf9a142e7cbb0b14af56e50172fa3ade8583e211e6ea2d72ad77b80b. 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/ESA092414174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bf8f7ab25f1d82fb60d8cbb45027ee2174970f003c61dbbe26353551c677a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ESA092414175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00468bb8c3030d44ec317dd6e24f247cf0a6fe5f1f97c657936e693359803e. 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/ESA092414176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a678e44ae082b827157393852394e062ab6b4226db1fe5d37593a56ec63ec4b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ESA092414177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c78384c079e24b4a385f6ad793656a4fa7eac7dc481c06e0bb065fb7325a24d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:01:43Z), 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/ESA092414178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544a96d478915eb2bd70cb3d33d29e56151f1e29b7cecbc081a42cc7ee326437. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ESA092414179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9771dea89ccebe6b793fdb51b6174491df01d487d0bd625233fb0261d8e3fb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ESA092414180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab7f01f58b16fdb567d7dc43a469c77cc911443d4ad0b82dbf1391c3ad4828c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:08:11Z), 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/ESA092414181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589de0eebe26cbe38f2bd81b09f4f0d5dcd4af5296433d2ab40ebb000d50b0ec. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42400342.