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 0x56567ae5a4387322208e802131d98d970123f3050a97fdd52c71e25f1ef8f45d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62596bcf-7a6a-4496-a0a6-d8acdbd64e3e.json and https://artists.proofprofile.net/proofs/artist/62596bcf-7a6a-4496-a0a6-d8acdbd64e3e.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 0xb6bea934ab1997239343c29961b85d5d4d4247b441c49ad6d9f2bd2bf381bf33. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:12:31Z), 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/CAB9Q1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4309ecb71f5952589d817ecdaf2f9af10e3ec7dcb461790670a04ce495300b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:06:03Z), 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/US28E1615804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc078ca3e6484210f1603666a85aafeb073e79e2d2c50c5556858ac15c57ab9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US28E1615808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc078ca3e6484210f1603666a85aafeb073e79e2d2c50c5556858ac15c57ab9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US28E1615808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4213a8d09632e0f722245814d06b011eef6ae9c909b0d0507b16cd92d70d3954. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAB9Q1500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6735344ecb7b1791de3076bcc3ad64cb103ead9ca87fceecbaf84ec3679371f. 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/CAB9Q1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0233d7960d2bcf31e0469efd0ad56302d83d8e09f60c72031678580f5c32a59b. 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/CAB9Q1700033.