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 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 0x827c476de3801f612d807c43b43a802fb1a0391a47aff6551fbd3a28756d57df. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f39f1bc-f9cd-4199-89aa-305d1e9fa88e.json and https://artists.proofprofile.net/proofs/artist/7f39f1bc-f9cd-4199-89aa-305d1e9fa88e.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 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 0xd6b0ea19db6b933d2791093b872b9145ad3cc841e4893d1d4d0c12705da3e2c8. 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/ESA082291167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b61b7d80b8821933eca884c80ae6f77b3d2d4cc314c2754fc49614f3b172aa9. 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/ESA082291168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3212e65c7035e8685165cc66977d9d9aa287eb29b3b14bf7655b3142340fb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ESA082291169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8eb5e33f7be96c744a9954e2e5e730e7fb8cae997d26d2eb6a0b1c190a0358. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/ESA082291170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7851a2908d57c9e5f13f4826e3b33078737db31cd1f5135efa5782a115c0cd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ESA082291171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c04113a6f99871cd27ef668b2a534737bf8296bea8120bab8f9c3668a9ebd9. 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/ESA082291172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4156267f04e57c9336ab3b9cf5603ed6b4fbdcdeec2ebb3b3dcae5ebfa029e0. 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/ESA082291173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97276c23fb064078c53de85346e726d954c4d50676d1ae0e166bb754ff35be8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ESA082291174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf553ecde85beabccd004045f396b2b97ac7fe92b916f4e5e2b30cd5735d2fa85. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/ESA082291175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe595a4f0843b2a00cc09d77a593d6f92e4c80a23dabe69d12d62ad6171a6cbe1. 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/ES37S2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999b01bf480eded41bf6dab7dd6dc6233ad61dfad427d4a388f193118f33cea8. 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/ES37S2200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a573fa5f000703ab68762eaef6a4d3886ab3a902c4e7900ea7229ff38e94f1. 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/ES37S2200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519df13a16a005cfc3329e53397fea1fc52ce1db448299619cb0199f422899c3. 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/ES37S2200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a902274a239218f87f8e9697254b497e95e9b5f58e7ff77e5af667d6628a8. 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/ES37S2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483a5a41a220de1433dad163235979313f920204108b12a8097b99f45b265662. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES37S2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050b2072cc1f10e6dae52a3b76489d7909fb9e45283a9fc42195d553980772b1. 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/ES37S2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99df84cb0650c385299b54a0291546cb55a8b0788a764619088164e2ca62966b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ES37S2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb28113335f03a7d4b00c3101ceabe55a99179b862427de07269bbc16644945. 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/ES37S2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29c46541e700d43346b4e60a581d2400feb4dcdf30baaf087ba5d5777b5dbf2. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/ES37S2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7a87aca568d4166893a1dd234cfba7c36b38f8799adf36178a51bf415f620e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNWV2472735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b249699a792fd05423c93c756f19c65103e9128af594270ca5fef19fbc18ca3. 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/QZWFM2342575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe595a4f0843b2a00cc09d77a593d6f92e4c80a23dabe69d12d62ad6171a6cbe1. 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/ES37S2200076.