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 0x74ac3965e400dc99f9388d64cac022b3e4f201a5cacf8525ebd58a772d128a66. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5754a52-c588-4f61-8771-59df0dfd0c1b.json and https://artists.proofprofile.net/proofs/artist/f5754a52-c588-4f61-8771-59df0dfd0c1b.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 0xcc8037146cf174809a01d5d9652d9e6b6fef99cd98965a83ba533d0867bf7624. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:16:00Z), 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/QZWDE2490684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbeb1ca07c41ad19bf2bd9ca67f3ff183083fab66df2d3979f962c46347d797. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHH2383622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89911568661a950f9d0bf5dde34d2dea9e062839aa71d266b2f6ab52cc29c99f. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:54:16Z), 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/TCAHB2340096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012c5932899c0205b01a234d92eb698d1e446b92410897ef7ca2f3bb9ab65e5c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:25:28Z), 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/TCAGZ2380985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e847ae0b9581a5a5cb41c7caec5762f745455f4e114a42b9b82b880c82c67c5. 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/QZWV32447924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eb1eafc70f02070c08b9e0ee21b6250a320c588089b3bdcb17144176d8393d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZWV32447938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c597304cdf2083fc3fd066b1fb58df39d3bf9eb82001b1440a829e624488de. 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/QZWV32447947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb690a3d3cce1f3d69cd48a1b85a84aac518490753cc4d62ba078fe68d9bff7e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWV32447951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576ab678c81a895b58ca659e5781d601d7e32e1162ea6fdb851bbcd8b2148797. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWV32447957.