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 0x42c1420850089fee0ed6cc962fb88fa604c5eb7c7eb43371b808985bf2bd46aa. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af658987-d202-4934-93e2-f2584a4587b8.json and https://artists.proofprofile.net/proofs/artist/af658987-d202-4934-93e2-f2584a4587b8.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 0x8c41662ac33d211ac648fbfb753f45b4dec3693f942594ac8a5f43c197d44fe3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAJR2515392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e1a69e9806d25a890a38cea5527d3f568fc74233a11f7fbfcf8f349d762b11. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:47Z), 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/TCAJR2565075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb099a3e8aa9b39bc293a622ebc3408eeabac3136441fb90e87ce40933c447. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJU2507484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb617c1e175a0913c483067bc84df29d24b4feaba6644e7048770ecd8c215599b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:27:37Z), 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/TCAJU2507564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d24d2c1db9cac24558cdcf9f8bd365cbc2ec0984750f82066ac2c1541e7bdeb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJU2507595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c93fcc19d32902c29bed420cbae783bce191c2f9be6945c7d83356bff288a9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJU2507603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcad05c4c4b694fc2adcb330548446db48c01130d6d18304a4e82eabb59d608. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:30Z), 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/TCAJU2507609.