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 0xb1a0e0788647ffaccb7dc04ceb1821bb2e9954c1d06676270e3b3319e98a0512. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd0611d3-20bb-4fed-8e7a-ed32b4102940.json and https://artists.proofprofile.net/proofs/artist/dd0611d3-20bb-4fed-8e7a-ed32b4102940.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 0x58f886fb52211eeb0b541ad236aa9e1f86ad9c6a99f479d52c9e46002672e97f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:26Z), 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/USCGJ2269580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeca16c693e9514222bddc4f258e9ed25f344ec56fba481d0bbb027d116c7fcc. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USL4R2216594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00cb360dd2523bba8e2fcfce426a5b0684c89245670cc5888b6cce5da8b97d3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USL4R2216595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9061054f62839b685e37eba1ec72779ba7780db9a8dec583c380277eea167d0c. 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/USL4R2216596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593e60f1fbf4d3684e0dfa29041b77771889fa21f4c088c48def3917360bc27c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:05:37Z), 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/USL4R2216597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34b953e826e474d42466248f1fb294860bc9593f5fb5398d1aaf9dcafaf681f. 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/USL4R2216598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0383a929ad0402419f611833739531dfe5e7c0f05b0943f91b62ac7ba1d49911. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USL4R2216599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d720123b4fa1b2930ba057828080f981bc6305dbc6a31c33ac51edbe5d4f9c2. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:37:49Z), 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/USL4R2216600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d96a44c220feabfab78da7085b61adf4e3c4f958049171ebbc95486667a655. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4R2216601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1470a55d25e4147e515006f7d1da1ff0d401ce5ff47e782002ffa1759a358c7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4R2216602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83837af0ea0e0c48ac55c00e491895d0ae0403358787394d549efb44d8452407. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USL4R2216603.