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 0x334e7e4f83d21fee5ed30afae55f0fe509efd20706c6cb92ec35e8a9490d8d3f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3a4b0d4-b33c-4154-b133-71df4de1456e.json and https://artists.proofprofile.net/proofs/artist/e3a4b0d4-b33c-4154-b133-71df4de1456e.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 0xf0bf9f322dbb98963aebb4b73de0afb0e5254a782041c5a5230fe25aa11fd25f. 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/USCGJ1556312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff0914cfecbcb1072bc9f492a2c59547b996899eb905a68f266c0a8e330b94. 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/USCGJ1556315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a243db7ba3ddaaa18c741e7c646bc37aaddfd7fe66b1aa799e7a738c87687. 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/USCGJ1556316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e05eb92cef0a79cd3255fa5a341c4a84f3677621a09349df2805900668fe37. 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/USCGJ1556318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454ae96e7ac4c30611e385001ad845467c7ef090edd0ffb72b2dafeb97140b98. 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/USCGJ1556320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165b928e253971e071b9d80fa64d25be74140979c30a84427758bd9db5604c21. 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/USCGJ1556322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e46c3603932c8ab02bba1348b2a54bcb467090d3349c19f973ead6c7c90376. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USCGJ1556310.
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 0xf60eef54ffdca275c1758cb94c535b1ee15f067b05cb37c8471e31bd157c0bcc. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USCGJ1556311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32fdefbb2ce2f90ad0c0e8e36ad1092edac3b27a46b0bbb9d3240b713a917c8. 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/USCGJ1556313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b44832daff12097bcda37ebd2091d1e717605c993665dff106d091e4d39f8a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USCGJ1556314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4262e32184417d4f598c760ef812fbb0dd0a60c018b7bce700ba42c2159ffefb. 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/USCGJ1556317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2d546f9d4a18ba1b90ea3533a45adf0a8da4e1efd900b84e38b1c0a10c0b98. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCGJ1556319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c17385c1638a8b8bbec94c8b98322b77726c4804373dab6706ec36368c880a. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/USCGJ1556321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2f9efd8078e1db6c0f899128df85110e6bd1e046554c561aeaa81f3613a497. 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/USCGJ1329178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87599cc1a791d8c8eafbab1fb5d53260b8cfa036a706d27d399d5b27297af9df. 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/USCGJ1329180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56067edf4672f4bce0ff6b15580af5098ac4154932a772818749401df7a710a4. 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/USCGJ1329181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dabacd64e9c99fc4c6d30521dc5f4d6517905ddcad77683a9fbad89c3bd4bd3. 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/USCGJ1329182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7229935caf8f8f52c8f98897eab42490b1e8096287751324cdb0dc83534a9752. 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/USCGJ1329183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9df34e3dc8c624b4ae08c4ba427e409b684ad76caa4408a092a827445f3c7b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ1329186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf60fee885f9fe13327241c1b5a32b7534d682b4f97e6c859a1ff4e4a5bc2fc8. 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/USCGJ1329189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47db9a3480e807c138b38fc46230a52306704abe23e92888bb4a7786ba4c7a3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGJ1329179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a81fe88f17e1ab50fe7187a60c31687b29ae7129b6f09806ae5a9f9a569acd. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USCGJ1329184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b2bca00583bc562afc2047395677b5d12a6b79de766d55eb04c41972aeb52c. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USCGJ1329185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939c55e80824928f537a57767149c4110e98cbde1bb1c91edd5eaa744023e5c8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USCGJ1329187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54191288bbe685632f9c8b2673974b728066bc09e82bf1fa59a00dc736ef7bde. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGJ1329188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407eb841da9e30fccfdacdd4e117dcbb40885f9c19152ebf7b30c1796f3e5661. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USCGJ1329190.