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 0x0f1706267c9550bcf26db89e9b1d7541fd8ff0e075498816be98324a7ee872f5. 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/e20aea90-fb30-43f4-a4d4-1b8ffa34016e.json and https://artists.proofprofile.net/proofs/artist/e20aea90-fb30-43f4-a4d4-1b8ffa34016e.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 0x759990bedbc7418c20575d961ed33a9061fe256cbd44061ff6835e74cc9a9b0d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMFME2004950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd1d7b37e6b4e3f626686d584aafb6f52de2352a7b14cb42eb3c0673c710dde. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMFME2042567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c9fccd272337b0478e001a1ba3f04a57e2e6f33f176a97092bf77ff1aa8635. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:10Z), 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/QMFME2042568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbab8fd1e3243b1a9058a016c3903de92ab9e4689b65ed9592b3a374fa40e65e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:22Z), 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/QMFME2042574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e01bc370622317ff3465543db6f466e4f79bdb0406d4b9267a2765d51c6a3f8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMFME2042575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45098d4b05463abcf8831caf24430e67b78ca9bdddda72605647abc8fe77ed4d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:37:02Z), 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/QMFME2042576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeefc18551a7cdde9b2f295cb1e7f0c3ad7a675a1ee834f2327c16a75127bdae. 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/QMFMF2116848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b32cfcd5b63ef5e6c5bfcee651defba85d01881c11b379207b948fb04dfcae. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:03:18Z), 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/QMFMF2116849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e5289068e6128cfc18e41a88190372792e0a6af1c343ec0f790dc94e59e55f. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QM6MZ2231591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f76b92c84e38cd07c7b35be1f89e5e3fa0c5fb81af1816a1338908fc7cc9896. 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/QM6MZ2231592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83ea463c94b49115ff819614c059ae75be6265c65a419f99b2dd8b2de593c3a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QM6MZ2231594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fc536d528d7c0d5e5c5e4c0e797b9e037280c3df3e7f333faf2f0258c00842. 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/QM4TW2379602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d7bef579affa3ae103ad440a3c4764b543f7239f580625bb23848c984abcfe. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM4TW2379600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80ed12f490f16311b79d19f4404fe3781122f3b611e3594a8edda83ae2e0e05. 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/QM4TW2379601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fc536d528d7c0d5e5c5e4c0e797b9e037280c3df3e7f333faf2f0258c00842. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TW2379602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd41600ae8cb7d64281ace77a65a4a0da9d156457ece63d27c1f25bf120418fa. 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/ES94E2410608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4f8875d71d32333bed6711d7461b618bac009ccf2ab7046e2876e4e3108c5e. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/ES94E2410611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c949532daec884b9789d0cc73caa8df0526a08784f9d7216482fb9fe4ffe5f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:18:22Z), 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/ES94E2410612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd176dbc60377d6ce17998f40f774012456490f7abad2f29d9ba9d003772422b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES84D2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faf60222b60cad745c4f564f4b6280ec4b0a50aa924fdce43071df6d710168b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2450320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e616cd1787d32611cc14fc892276954fc154ad1a6b86e8dbff434d6cd62ac9. 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/ES6102424702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e616cd1787d32611cc14fc892276954fc154ad1a6b86e8dbff434d6cd62ac9. 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/ES6102424702.