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 0x9df524e77a14bae11114b31b7f010174c454777f99681e5c52ef1f43b65c6385. 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/3e881df1-22e3-47ef-bec8-1fb3b0328a5c.json and https://artists.proofprofile.net/proofs/artist/3e881df1-22e3-47ef-bec8-1fb3b0328a5c.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 0x20c3fc79360d57c56b7de820662b3c627991fe457d98387f5d08ac2609c214a8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USSUB2465901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113ad7b0f2821e1087f36b1c1123f7197c3a2a82e9d71aaa394b6961a2510ed6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USSUB2465902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51be1beaf26af4394f37b88f7460fa3ac4be781e48b01fde435f4223aa0197e6. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USSUB2465903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef465d73f5d61ef751d2d1cb9c71e9b10a07adaeb06a4020ca8995fb18a1ebc3. 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/USSUB2465904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960e42764010f6ea5502d77ce23debb8941331d4391730785da4e57225a68c8e. 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/USSUB2465905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16f4fa9231122179008fc6c051ba33a315e9a16cd57504f400b1b347eeaf851. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USSUB2465906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5036fea38a1fdfcdb263fc984fea5fcb7670330cf7327135ca26db402d35ca. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USSUB2465907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da33e012a01784843e7f1b0958f7385d639f52ee1b6820dd08fd3f3a5bf868. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:18:09Z), 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/USSUB2465908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ca06b11f0a5395c788992a6ca6f250f7225fc744d37d588450b6eaf9bfb436. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USSUB2465910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f16060a450889989a4b7f01a3a483204c7572ac7325f65ed848b939f03418fa. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USSUB2465911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8704a17722da2adcd0a9ddaf741bc343ccc215ce2e1cac59ed95ca7e6f67613. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USSUB2465912.