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 0xbbd1ccc8d6dbed69d64f22b2dbcd4d419ccf403047f91fe32e07acf712195c6f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c09cf727-dc1b-4948-a10d-95050edefb5b.json and https://artists.proofprofile.net/proofs/artist/c09cf727-dc1b-4948-a10d-95050edefb5b.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 0x63025346b251e21a9dd00ffc64e240f40b6594c76e0c431b02572d1d63273434. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US76L0710179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe274d40e5e470b6bd14dd3ce790868312258ee96bfb165102f0e8835ed40bc2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:16:09Z), 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/US76L0710182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c8bef13cb7a958da5508e06af44a3b2a86a7d5ba8cbf3bc601a7e52a20d6a7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:05:31Z), 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/US76L0710184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5a435d2e3dd1cdb3867e72fe262a1e4dd40deaaea302d6dd19f2c53458af2e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/US76L0710185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3182f4d7f5f543e452e99602e8d9fb0c7eae9636f9300a1e170c04b084a47a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/US76L0710187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a9795499e7854d995eef542d98f907c761d70b56a3f9b3292d4cc982632d95. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US76L0710189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb37ef529716a1227acc3d0a972bcdda595e1448e0307b77f243d5b18df464ad. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US76L0710191.