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 0x93dd92567e7462c8d634b40728236079c0435cd4c759b164893c04ab55732bcf. 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/934f59c9-a4b2-4251-992e-f45baa620fdd.json and https://artists.proofprofile.net/proofs/artist/934f59c9-a4b2-4251-992e-f45baa620fdd.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 0xd9547d6245335e8cf56f1737e8d014fd0191536fcc02ed0f3e9110a81eba34e6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZARB1815860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75198776e970642b235f1d6bfb1fb18e02bc766a2d39eb7fbdba870f9a220f9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZARB1815861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d2d26894bf9adac356d10db03f0492918bab605a506546ccf5fa23455966fa. 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/QZHN81977647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae1e1158c6a5284337a87fed9d03368e83e4ed02b7d644f2c8d5f8dca0cff99. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZES72095819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc257a3994285dc972963df3de13a32235962e8213dc7f9c8bae2c1cf1fc90e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZES72095820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031363609a5dd73e21c1b500ef6f1b21a6e35bc91893a28b1d462c3c7f8b214. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:43:34Z), 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/QZK6G2095502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c0543e779f9091b69ecd175c1f920cbef9dcfb992da8d88f1edb0ff216d217. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZPLR2038697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031363609a5dd73e21c1b500ef6f1b21a6e35bc91893a28b1d462c3c7f8b214. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZK6G2095502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae126ece9e9263393ce5af5e9c002b46caa8eed0c0ec6e188ff35bcbc3d6340. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:15:33Z), 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/QZTAS2182262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2af958dbe9ceb2db72bccadf1b83595388a7c87da2267bfd8a41051eb1102f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZFYY2339699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6082043916b09dc1235d8bada5d74127a0f019a9c0975053f1d400397654a990. 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/QZNWR2308940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d21f436adca232aecde124468e7d3822573f6f1f25e9a273b4e11a0be2ba01a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:35:55Z), 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/QZWFN2348910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18fdad37f27f66daa3ca46cc4e88aae22d35495251e57b053396f9afc5dd9eb. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZFZ42441869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785473689151a9c3666a6701f712b5e498674a3fae619e30567a55a8ba83b7e8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZES92495125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2af958dbe9ceb2db72bccadf1b83595388a7c87da2267bfd8a41051eb1102f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFYY2339699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5700a8e95fd18ff44e2e7d7b57493153e2ea1b18a9498440eb78be900405972. 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/QZK6H2315156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabac6fe1be565daf75e5fdc667b703405e24604791f43d2e854e49e8a38b0aac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB42391342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41967a8671e2c502376a461186d9e4cbe23273090a4eaf7b6fb45afd5f27accc. 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/QZNWW2228458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba168be338e57f444310507c9351f5386632ac62f6b2c0e07dc5f3a3e24e5234. 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/QZTB82307716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ae1aa9b19f0b7e571ea039569625cd5f58f9ca58fe98370d6119aeb5e54ff4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNC2485265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fab70ff38e8f9ca1103c710d6d6f59a4665861f6b6853ffa15afd66d74e411. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFYZ2252978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d21f436adca232aecde124468e7d3822573f6f1f25e9a273b4e11a0be2ba01a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFN2348910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866e2746b6fae35d0f1bd7125ffb3b9247ef8069d251c68af00803e65422b62d. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZTAX2424558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b74177443a46823ba6db77f8edf31e3aa14b0fe03adc6ba4d2cea7070c44b66. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWDW2433866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcf63fec289b103f03015d4c6cb32e3a4441baf490afde41dd36c1e019e0820. 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/QZN882505847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b600631eee8eaff28091140c8b3ad0e64cb513f1827b9fa56a7da78aa32ab4. 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/QZYFZ2504244.