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 0xfb9853ff53c8f61a588c7ff576a19bad21eb760fa18ac1160b27805a138d171d. 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/187a209c-bf55-4f73-875e-eb3db4680f74.json and https://artists.proofprofile.net/proofs/artist/187a209c-bf55-4f73-875e-eb3db4680f74.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 0x2e20270744f0a1cf87067c75d847c61edb8adaf7440046e063817aacc602aad4. 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/QZHN32195065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33010723b11c786f9c9554fb73250b2e7e3068ad8bb93266e3ce0f2cb9b344c2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6G2142980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f640ee9db491c0acdc0af801f9fdf4dd1a76c94f5362347cfd843e2337093fa. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GBKPL2287917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed6a3b450b02ffe5f7e16ca0146723feba3647e263abb7c0ffe06c35b4c98da. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GX8KD2228322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfac856febacda25228d457d4ac3d3b7b1418f658628234f9401e16bf7ed6c2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTRX2379265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e8d8681d08e89a8a279671aac24db246397e1372d6daa904b244ea02031c56. 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/QZZ8A2343954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fbd379f23e6efdf8e638f8c5fada9b0d79ef46c794064250f38ae3463cd5a8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:42:52Z), 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/QZTV32348610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d867063d74a4899c1fa1f1ba022ea8f6abc30c599056e53d9778b765bac049. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:28Z), 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/QZTRX2408105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d5a5f93e2b344a3208e02b987b82760cca04399383bfc3a1b8b7aecef49cbd. 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/QZWDE2403561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1dbc7291cb3c317b3c37dc71f7528151bca03934c0f7d04c539b79076489d4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:51:52Z), 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/QZWDD2343871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132efc34ea067d23bad873af21f3408a6faf5090a813f720d53240080bc46251. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:21:28Z), 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/QZWDE2377180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457ef714dda2216e8a6f1c9a8b7e9787dfaaaf0a4c8be562c0577e586809f1a2. 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/QZWDE2403568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bb84050232e642fe5e8b3c515d84d29aa8e390b4cd9c82c93eb82df5dcd8c5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:16Z), 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/QZZ8A2451814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c80d2c5d1c002dc6a777b7d97375828c63e1d5776d0aa28c09a80bb9e827ba8. 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/QZWDD2576616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fe9823dbb9420707655de9d44b3d8e3f2b8ee17a135f761a6cc4a48457e775. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWV32547891.