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 0x7d1656a30350ce466907b42148cc186513e78147c661227b00657dff483b88dc. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cf9c717-60bd-41c3-a8f4-f9c0daa9d2dd.json and https://artists.proofprofile.net/proofs/artist/9cf9c717-60bd-41c3-a8f4-f9c0daa9d2dd.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 0x370fd867bc0590e755f1235e361416f59583ecdbe056f589346c3611e7ae3a19. 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/JP92A2208949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e17130c4b0a824a55418f0e788f594ab953421a71f8a1e7ec091abd6a2521b. 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/JP92A2208950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a1bc5ea1077c5a28f0f9e73fcbf56cadd4228226ae4c263afdaba3b4ad2b9f. 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/JP92A2208952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e9ae1cdfb5b360ccb588dffb11600633cc435aa0f2e6e51427b2bcf55c73cb. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:32:42Z), 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/JP92A2208954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5a293ddf169c3628eb10dcab68269405b57637a2969912ccfd0256a1a89ede. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/JP92A2208955.
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 0xa6b1e6efbccad0b1326c98856643cf0508fe7c18786611f1131726c5ea6a92be. 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/JP92A2104500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8298af8f954dbbbc93af3c165475462547c839ab93be041b3f012d8be88b590. 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/JP92A2104501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f627320c65bf74c4dacdfdb71e52c9489cda5a3057dc6e75843afdd6e2fe3e. 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/JP92A2104502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80424101edf8a17aa5da3e93197d56764e8b6eed1f81263b9f27f743af6c0d3d. 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/JP92A2103226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7423eecfd0f24ff923a46d0bec0667dead36a1e43e05f6b4ff82588edb19aad4. 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/JP92A2102549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65835172740cc5f857665e6ee5615f55d1efaffefd2625b2437e7257c4683b65. 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/JP92A2102550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f4e3012161f50bde92cd41781fddcc9a26c286effe4d0960bcdecddfb91b8b. 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/JPZ922104761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d10b080d26b94449bf2c3a2c30d5b74c11ccb1241ddf8b68baa77d85b47a45. 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/JP92A2102457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da0e5d27d10de73bafff22b522b04bde91a43d72ad19eee1f60930b892ec18b. 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/JP92A2102458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb9acaf083c00c6e493f35e2869be4e11b8bbf60f0cf9c99c36ed29bbaa7571. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/JP92A2102459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cc3544f07559070ffcf93d604ffe06277bc1210e57dfe8df0a1e160f1d729c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/JP92A2102460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7b4701dd340e052ded2baee1d582d219ae19cc964b5dd573375af251955b5e. 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/JP92A2102692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d094c90837532a5db6431a9dcf4d6105894faf445451783dadf38c146b6b1. 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/JP92A2102694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795a9cd1b8b8a2ce66642e75bec44896a18693a58cefcec13ca368b2add01cfb. 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/JP92A2102695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9690a755ad8dae17e3a7eaf2db37a18a933551d2bc5fd1113a9123be38e085. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/JP92A2102693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271d5157a0fd666cffdf0158f7db157098adf2c547bab15b22364d79df0f2f44. 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/JPM902400072.