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 0xd0a5d8ffb7cb90a5173bb7f8ee832042b6ca90bf47cfbfbfeb20356b041d48d8. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eeec34ae-31b5-44fd-9d22-07bf5f6b997a.json and https://artists.proofprofile.net/proofs/artist/eeec34ae-31b5-44fd-9d22-07bf5f6b997a.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 0x15fcc312352ff76d7e879b0ded57c97d45cc14d426882496ad0574bfbcd311ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS632490990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57124b3557bf5605d8ef498e6cad39a40aa62aa5cecc0ec5221fc4fb54622f59. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZS662459215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de2ebf3a0c59a2f03f141f40ef14115e051aaf2cc503fa7c58f64146a7c191c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS642424638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6695274031ca2baf39eadabfff4a803baf2ca529800a76ef73bb4eebbb83df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS662227268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ec9abed07fc42570303a192191eda2fa0b19cf7298bfa603dceb36adf19d6c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K2391256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281a9dacb7480d286a57e1919c3d256a1600ab1a535ff8b631f2eaea5338910. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHK2216963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45ba9b1a77af2ebaece2de9b589b32baa4137e7170a937a9cee31e7b019caca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS662207497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59181206894ed115eb5bba7a9a3758880fb0e184e37bb6d05c44ebf5bf6ce2c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS642259403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0b61a0a14b0992e64df45a9290bdcecd3bbb70468574e602d83dbbd87b901e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS642281709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a8a49e9898b7a61556dd26e22da056c1217e07132855078aef7145ad6663e0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS642280921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218be67b9bc8057e91329e7630eb9cc3e3068680ba296aaeb4d5559bf9f2d0f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS652212494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f001fdde06cf960f4b3f1f14d15ff3cc416e7f05040d8c0faa03469dbc64e1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMHN2213416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd2c4434f9ee046b4d703990c9f750bf0281231657adce9cd2e37e563523bdb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS672290623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0023a4dfe360f0c4b61d517e32db6fa2765c26cb75e844803676b07ead51113. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZKDK2249472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14150f959413831db2504f7609b7aed19ba0ac69a6a1980ee786b00ea5ffa4f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZKDK2265786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3d25adff066a709d138fc3893194e9370cc365f622d8c66e6ef2e5e4141017. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM42K2280247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4e1f21962d29c77f96b55e34f004d35ed81d33845fdd7bc49f488ed49f5227. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLCK41079932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b555a22afa1135d7a48b91a66a795a485f4b1e31e8db96ff59a1ff45ad8382. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH742179572.