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 0x01d34841f7bda5081760ee9f33b16890b02a8b86769b5d555324cba5c765950f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cd9dc1e-e2d7-4755-bb5b-2a3ee9f92aec.json and https://artists.proofprofile.net/proofs/artist/5cd9dc1e-e2d7-4755-bb5b-2a3ee9f92aec.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 0x686fe57e5bca0bd09597b930d0999ad856f98938069cb18673dd72debaf5e4d9. 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/JPS801837753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e34e96689411a395b30def44ab6d0dd04c589009916582d50881146d7df01a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPS801852167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72320a32224d50f90b9b2a0b9b91c0a76ae3139c839abd46452e11bb9e11d58d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:25:43Z), 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/JPS801852168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071403d0c0e3b86c4b1caac6c830aad754ece4799c56908c35dc9c2766f9abfa. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:07Z), 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/JPS801852173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4209e04878be0dc8a8d6419003baa35fd8a7be7d9b8aba785b7f84e339e24082. 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/JPS801852174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10744735354fc01a0d1dd8e88d9597dff055aaec885b84312b5f75f0cbedcf7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:16Z), 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/JPS801852175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db10d6fbac23e62737906d72ea90446c3b6a46770c16b76bc0375162fa1aea. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPS801852176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1153014b744c6d61caa439b8a04c4b0fd1f8025e95c74dbd8bf364a6e3d75dc0. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/JPS801950874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2ece7b48f03a8f4ab24ce458f1a92358767f659b5ed88cb459662ff065b080. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPS801960200.