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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e769a4f31867024ca4384ab295cfa7a8a15eb6685bbd369a1ef815799c813. 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/f0de12d7-932a-460e-889e-ae5b750bdc8d.json and https://artists.proofprofile.net/proofs/artist/f0de12d7-932a-460e-889e-ae5b750bdc8d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346190e2ac09998d6b4b24e4f532c588e298a7fab0871f5332427cc5a5cf42c7. 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/CACWV2368592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c1744a8de657c742a6491c27466c33649012c549d08b872fd749f18c0b16d5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXF9Q2511073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70b63feda42d5bf09a754556c4a9a46669d49d28416cd83658f7fc6f214c441. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GXF9Q2576849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bba9cee776c7179f45673023c61970627772235fb3a16cc70da6f892e8cc59. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/INH512026901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963e801d51117e32903690c4475c5f611277cf62880baac818e0290b301f376a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/INH512026839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d14df520316aab87685f472fe4f136ac70231d0f8979b1f6c1eb9a5c8c7bc2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INH512026896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82de74af0a71a128ce7510a512fc234e5d5f282a2a20b33f1f2c5b208f8e4ee8. 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/INH512026894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96efcb13cde3a117a130947394fc11a94ebdb6d2083d7fde25c902d1a030e96b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/INH512026906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1bcbeaac6aa3c22ebafc108e963a2d2743072704a0fe3189fe4bb27e0eec2c. 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/INH512026987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb90f953de2c3d43b9161bd340dfb8cc61952c4318518a22c939ab9d060cbc. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/INH512027306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9fd116ef2322ee1a561cbfdd25f81197e3cb1e33636ac4ad22fcde4650d3ea. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/INH512027313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4380b2d85f6f3235d7681ed45e23dc639a92e78f563492f72891708c8adecfa1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/INH512027293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dbee23259ee85b5759747568a6f2a2d75cf30754e9676b4b8577c9fe7afa2c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/INH512027312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea09c74c2cb78d663037fd1932da0c7a3d9e9bdb97749825bc821375ba17e519. 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/INH512027310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43efc8c855abec150b594645e06e8fa97b5c41e157eecb50fd4d752e8f3e9dbd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/INH512027680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8e6227b80b9f6878d87f5712230dbce7db08ff93ba33c655c4259eaf8d2923. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/INH512033182.