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 0xdb0929b163d8eb6eca5e4aa3e7775570fab0f0ae81114332416e13e8ed8ca988. 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/0298f394-8e91-4edc-9132-668ab24a2e86.json and https://artists.proofprofile.net/proofs/artist/0298f394-8e91-4edc-9132-668ab24a2e86.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 0x0f37540ba66a7b6c84cb0de143a2cc8f0714289b369d105b61f1d7fab3fbb08a. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:08:31Z), 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/QZNWW2074085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118e83ab76ef1add9cad1d577b7f58594948081caa54994113d33e708def328f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNWW2074088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f89a87a6dba4c7822c64c9d2e36d2a3ea8ce1e3b675cbfc1e1e8d35952c23. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWW2074089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a9aad596ec873f3357477ff5bc4f0160cdfe5442d81bb917f50dc1cb689422. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZNWW2074090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b7ad0bb045c580ec48c2147025a9f5f77c288930358b3f361a0ae7b4291040. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:35Z), 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/QZMER2140537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6093eecf872dfb49b6d5a533e731836ff8304d50238a178801c7cdd00085c1f6. 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/QZTB72251793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913249e9586929a66d48fc88c5ca986f76572fafafebab7430850945b6a28a2d. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/QZTB72251795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64432e1d117504ec2994ae9373bbbbd135ea4d8a80c9f9c9c96fc85c63e9796. 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/QZTB72251796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cbc45d0e3605de938f6a7d98c18a0d73756df42f972fca6a18e4f5379b3d3a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:43:11Z), 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/QZTB72251797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60be65da552c46aa0ed7d35bb9ea909f6652ab5c83fd617d02e904727a8c6637. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTB72251798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4344edc3fa52ade37565c5ebbffba3692ac3e9e9aa8b13fbf887af375389766e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB72251799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd1246946f3eb2774d2660359879880558d2df6fde9409bc0a71b6218de10b3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:05Z), 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/QZTB72251800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081bad2cf7b91e4af5afef28629d1db711c898841cac88ddcb7417918542daa1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTB72251801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9b9f6279df2dc591839dbdd7f26bfce62a2bb3126f2bdcfe2f7484d1db5fd4. 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/QZTB72251802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeda1beda62cfb70415f98363597d39d08073675c470d4803df5cfd34ffe6f79. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTB72251803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce7089ae5bc8158bf160f555a58d3d647106ddb92fd380cda5f6fce28bacfdd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPLR2475794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00eda75fa541eb2d7ce5de05a189d71870f650c22497c04578af2504ec83a94. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZPLR2475793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4846de63143f7bebf074d9a0d3b81cf65981c984396c57b9ef48cffb14c86. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZPLR2475795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02c1fd5c4cddad90ecf055752960e71bfa0cc5ab63d119af72c96a11599d267. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPLR2475796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108be5b15e03aca25accff57ff7bb9db3bf501e910d84201afaff318567a0dc1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZPLR2475798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4c47bd01f588905229b0354ba924f511a6bb6896c911071ea7d9acb4954439. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZPLR2475799.