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 0x12af7d7551982d5f977293a4abccf39fcec40d1cca3c8bd57a9dcf48d4ced6ff. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7088531b-963e-4d84-b934-cf6919a33e86.json and https://artists.proofprofile.net/proofs/artist/7088531b-963e-4d84-b934-cf6919a33e86.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 0x5f1ce7d26a6ec18f2af70fc3f464e7147a3a04a9fe0fac2fc871d88296c50487. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TZA1X2000672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60061565a6a0138846570f713f425571b0d00d841fc2243e6b021c5e7ac3b3. 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/TZA1X2200646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1255dcbd1106205c0e6fecac6a1acaca1a412ab421fa1cf39ac7331e895a9fba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TZA1X2200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6fe3e12ebd88e0ea95a4a2a94133efd1b3124d16fa8bc12ca6a7a4de72315d. 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/TZA1X2200653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ac370a5c8b1f6831ee42771eee2a2326d0480ae298fc5e096a694eaa8d24a4. 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/TZA1X2200654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1e2e0e794bd85bef70284aef4fff79026eb8e8d010c5381b682710c57640c5. 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/TZA1X2200655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc72eb90e2cf38595731b1f9f1662350dfb05adccb677746d1da55d23b1c10a4. 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/TZA1X2200657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1615be524f304542d939ed30f3d8d446a796210ba4f0c0fd44674bb012f3614. 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/TZA1X2200658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dfa0bddf744c54cd145719ae4fea8f49224e3538e76df2860a35035574bfe4. 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/TZA1X2200661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa815223bee82a19c62cfbfd46cdec055ff97382e9f42670e98774795b8e6a1d8. 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/TZA1X2200659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb231ef8b8abbc223b53a97a52ca95769d085afe4d80a56921515b8e1ff7fe25c. 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/TZA1X2200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f5c43c34c5bec40ff296e75f80f6558559af75dfa8eb203cc6302fe55e6405. 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/TZA1X2200665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fbed0e23bb3bda2ba34dab2e8e95bca3875e27608619d7d8a7c7e6336fdaff. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TZA1X2200647.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc6a8500d1d3c6fc9bbd2624d2d2dfff7bfb725d013e6125e75a29af00b5c51. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/TZA1X2200649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095a5a0109015edf5ea5a36cdc591b396e9e193647fa3587480dc8edea2bdb54. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TZA1X2200651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9033416ba5c640a733ab8131e8050830b6350c407677be6b8e7bc658780fe8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TZA1X2200652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a795166247246375cf9ffda97e33ea019fa1745feea06d1afb9c68592ec1dc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TZA1X2200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f2f9d3907c2600dbc5f0aa25d49d936d8c8845525cdf465d6005209aa5dbf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TZA1X2200662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348b5085268dee9fb67fd3821ea6f8a5f6600a7d6a8044d0a1e2d7e921d23a4d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TZA1X2200660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ee9eff7932d244be7ae6d0cb2d5d1edd3e8b8a4ef0fbf3fc2568b46e51d8e8. 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/QMFMG2361864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9917a626c7a6b863625b794f55de07d166a6dabc000e31d80d005d453f5cf9f. 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/TCAGR2257051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aabef0ff8c047f3c3fa10c3887a837452d384e7f128bc7015b9149c9a3ba15. 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/USHM82128213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66954e6118f26ad84afd878f8d3bf3eb781de04dc5fa3406da3926f686c4885. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TZA1X2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d607a9a17d95f08601b6a02d82ac010314bb1b21b8b4441b983f8581f8bb69f. 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/TZA1X2200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54444133a6d63987d177704df91dc630ed2bb15fa9ee687f959966a7064b3d47. 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/TZA1X2200725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe489e939e03fc1db9d7581f8ab42a24e020d307a8965b6c150407cd62917b3ef. 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/TZA1X2200984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2dd82315210cc8983ab0a2644f42463de8cdfa6a6f9a45a77178967ec0220a. 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/TZA1X2200986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe89c45a17b016fac93cf983df2b2ef4332dc02d6193eebbf300a47c2805408. 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/TZA1X2300736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4ffc8742541bc8d474ff147f0cb58d83baf46cc2afddbb0a9c2d526b8208e7. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/TZA1X2300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9f903659c0b267303ab76cadbca0bc521b5da010ae11261d87504ed7e9c504. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TZA1X2200779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940846ad47134732aeb3055c6f4b2fdce8f43c0828f9a56e14d3f9b1d5f0246e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZDA82275124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60868dcffa24d38df2ead5b8baf2c7169b363b7da9fbfda03b39006cc382d88. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZWFM2385589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7895f3b3367e78aafb74d1ab3f22ddd2802d1cbf291005edc3ac51b2b86b30a6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZWFL2343053.