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 0xaf3834db06fd7e3b5815e84f11f77478aa9f93bc1b55bca8bcda0f7cae655801. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2bfef6d-38e3-4d1e-8bb5-f66e35b2a587.json and https://artists.proofprofile.net/proofs/artist/e2bfef6d-38e3-4d1e-8bb5-f66e35b2a587.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 0xb28c9196002250a90cf852870e6f727a2ae017b01609b6bf57264a5b0ccdc2ea. 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/AUXN22122506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6cd08ed3c279413eb2e8e1a98c5f547e25f9c8cd4fa06b0cc1d62b81c80735. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:58:03Z), 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/AUXN22138951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a57577f0d2691186ade8a894d0ab23871dd7b99f090beaa2ff648b6bdcb0f6. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AUXN22156511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee484286640e410eef074a9f2f94fa4557c7fc9d62919816d63d3d98dd6c614. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AUXN22222779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593c1eda988779cf35cd87871b7f04dd7be786f299b59b5f11d738450ecb7850. 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/ESA012250967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1446af57b6d9aabbbf3d2a6d52b3c46a0f298b1f5dfbc865ecd43cf2c06a5. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ESA012250992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4554d4207539086018c5d78eebb5ca1e62b05b08caa1fba72c0377a4387a2da6. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ESA012251002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f0862001f6453e44263bd958d5bcc5a32092fd40023dae5f70a9f894859bc3. 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/ESA012266107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c647067001204ca600f3100fb8a4327348bb411a0790ff4192271966333877. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ESA012266109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcefc965cc45c7178a734c8997b35d11fadd2fd769c0df92b884a0f64c5c891d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/AUXN22240614.