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 0x943c86646b2676c5cae101be73d7be23e908f5cd0c5ecc0adfa7c8400fddede2. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31350549-f765-4a52-8c43-81c0cfb8a25b.json and https://artists.proofprofile.net/proofs/artist/31350549-f765-4a52-8c43-81c0cfb8a25b.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 0x567ed1e62d8226f86feb282e8ed7ff42825692d30610a0f423e4182b3e0b5bf2. 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/US3DF2511274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5794315687cb76f6977fd8c611459e49b7f4eaa45b893c6d79e68096271a5fa0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:36:58Z), 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/US3DF2511275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf380b31eb26d18c9ddb17d85638fb9b687bb8a41cd30ba89a31225f58bc8992. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/US3DF2520406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66947e0a2e2a4f9c348b064d55fc2490dc672dd49091caa8c79ca867e451adc1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2520405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b916c6199254ef973432a76cdc1929e183d3165ebd24e40985932c49b04b7ba. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US3DF2520407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714216a1ec48adcabd28b3439a98fa3cff01985965128de98e94f12b00c9d628. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:40:26Z), 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/US3DF2574024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de4f27cfe37ee78d7e94ff2e74f4f7a6f4446a60e65852b9aeecf8a6d1023f6. 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/US3DF2574023.