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 0x9b6542852dbcc34a4f613df48d1dcd4fc6b4b80b31a4c8029a02be6fe441b509. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94e552e3-7eb2-427d-b11b-c1291de4dcbf.json and https://artists.proofprofile.net/proofs/artist/94e552e3-7eb2-427d-b11b-c1291de4dcbf.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 0x40e9bd3f9e713be71be53c5adeb0d697c3a37bd88db1504070166a699a0f5658. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USUJL1100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2019223ed31e9d3a2a6f3000704babd4e9eb2dda8f809cc58b7ae04a70cdb64. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USUJL1100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9994016b37dea96ab297ba61f795b94ab9361acc7f880a709223aed58eeecb2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUJL1100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5babba4549c5f094080f0832de413f315e3f0cc15994e1a93003a21f2dc8fb4e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USUJL1100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628e7bfe90654dc3b654932ed01a4fa673e356db2c7ef9dde375df6d4db71c03. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUJL1100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5649a83ed0503e2ab886d2b4d31c760d1792091d2bb2d007a7ef5102607c2c1. 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/USUJL1100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42c0dd7f116b0dbd1c435253fd598773442a6297896ebea7d42dcc113ed95a7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USUJL1200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006924483013ddc186dcef2f95d7b9125f85d8968d3e3c9629de9585db132c4. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/USUJL1200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f06f7ee7da491a666073699b99893f79ecedffa168ba1715d9582a95c28709. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USUJL1200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a734bb205707c79b8cdd374df3bb4d9287c20b8a469f6a30d16467574e69f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:00Z), 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/USUJL1200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6609ee2357cc86dfff651c290718fba89f2cb8b92c53e803eabdce623aa1e9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUJL1300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d37693041fbee79afbd19275092ec12ebe37d45c2e535d0713dc562d1a014d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:20:06Z), 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/TCABW1473703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715cd54ba23dc8fc5e0fd3a21f3d818131cf3c245ef3498d438280e83e6758cd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCACM1607217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f22b4df4d64704744e31ed47176bc2b0c2a245ac5fe008f84174e451fb071d5. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCACM1607220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6fc10985f5d6b96eb2dd6e58e69e08efde0c30f7e71c939370bb8fdbaf2795. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZEQU1919163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff9a61ccc5d094381a39605208a160caa2e9df1525f0c205858bc9148179f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USM951100016.