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 0xba143b4c3c287c7566e28d3ec9928cd3a04de962231e312aa8308e8cf07f796f. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be731a11-b5fe-4a60-bc1d-d0b04b574bb6.json and https://artists.proofprofile.net/proofs/artist/be731a11-b5fe-4a60-bc1d-d0b04b574bb6.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 0x49918cc063df2a5b58e3e6de3e51063154be8ea0d54127bf05c6c710aba87a40. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:58Z), 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/QZZ792426579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8f96ad6b34ce092fce03d1ed3b1bc61ab763cfd4f52aa881d155b140a366aa. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:42Z), 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/QZZ792426580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef2551273f4db82df0e7961157a4472bb5912d9a5020ccf0a40b94cce6a5fcb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ792426581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c377a93452bef982a824fb51a9b18c06f39935e77cf12ceb214ec4899b56f. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZZ792426583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48252974eea0e2bfdac8e01b1be80e693011cab6eef3c17076b24af9901e9731. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:05:05Z), 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/QZZ792426584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9340797aad233118dbe6f441b868f8003c75470aade00a634b2cb5782c0dd6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZZ792426587.