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 0x607bbab034386054f4658abb03f4b6349ef6a1d069c9e90a6bb7b11f4066cd38. 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/a48cc8aa-f61b-4ff2-a52b-08f2fb0a1cd2.json and https://artists.proofprofile.net/proofs/artist/a48cc8aa-f61b-4ff2-a52b-08f2fb0a1cd2.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 0x2739699a5ef060e3ccbd5bbfbcd72fd478bd68e6616ff9450c7afa72b3261d48. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT5M32558576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11f4388c4a9e09a428bd2d5e2c6f932f179e626afd26f20fc78322c5a76a68. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT5M32532960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf42ed300bb32340170694108e69e1c36d22e6a94252318922379576d72a96c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT5M32531513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f8b10942b895479a4141d2c88c548216c6eb303e64b297b18b8c447fb7a1a2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT5M32561369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9adb6054b744381647241b59feff1c5335f498b23e89276d48432a515314a7e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QT5M32516899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb94f8b7494247ca5468b30720016fc3322bec9165703f8b4d342d41a04d5ccf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT5M32540131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c3785a5eeb3850970c81ce3ffa21db90ad29417ce33dfa984d116e733f9e58. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:13:46Z), 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/QT5M32554082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a64080c3b8f586257d5ce017d8391a556c1148fa42e7b441c2120525b367ccc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT5M32595163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8237da02f8fe2b34c63479651fd36d21d1cfa90f781ea6a6b18d96bed4d60be. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QT5M32540270.