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 0x4825f43868241b4a6ea0bf5228250c218dd1f1ee72cd4a3deed68b2cd0759658. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cb97d0e-85bc-43bf-a9e0-cb02e102f8e6.json and https://artists.proofprofile.net/proofs/artist/5cb97d0e-85bc-43bf-a9e0-cb02e102f8e6.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 0x35f52c4b1b502ea2661e3769e8c6b28cf1b2f29ae5d5ebb73b99c3ff0d109918. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:46Z), 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/QZTBF2316470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f38c0e9fde941073df31490b87bbb06f5e9e2abd694d61dcee675cc7cf00c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBF2316471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd00102f5e1aad88ebf953c13737359630592aa9b9f10b75793d7b66cb57ddd. 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/QZTBF2316473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c638acd7db4a19f345988b3a3f6b6b921439fc1d35b56283e301dad4ea8fc97. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBF2316474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1326cf1662263d86922bbc312262f221e69832f72202e0d7cddc36297471947. 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/QZTBF2316475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462e4abf464053b6417a53874605927b9c37eb89d71cab02df2436510a4576ac. 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/QZTBF2316476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd88a9f9f83d70cdaa3ce84305ae8c471e6f94cca0d1f4f3f683183bb037d61. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTBF2316477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6df437725b86cced631a03c8de62c47a8b26f6a13c3edf56686d4c3b22feaf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBF2316480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd192755d6b0fbbfac0ab73baed1efdf4dec13f0c5cc8570d25bd383e603b498. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBF2316482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31804190a02038266fc735b8826b68a7a12b43dcc4543e33a4337edc62381431. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZTBF2316485.