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 0xc76a3eb761afbf860686702f8d48cddc64fa6598efddc43b25146a37bb289f3d. 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/d1a6c7f1-38e8-4381-8f65-1d595198a507.json and https://artists.proofprofile.net/proofs/artist/d1a6c7f1-38e8-4381-8f65-1d595198a507.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 0x764e21c1d248a4b551d94958d47178616e0951de8316ca2ef8ee922166dd94bb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMCE71301712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87228203e19b39b8fad1329c15706ab375c3d5b06e5dafdfc78191027bc605b1. 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/USKSV2305501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a506fdc1a5b4a5ce44de8a96947e5730b1d43d3666799e264ea9505d83619. 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/USKSV2305502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784b9f809d51b20ae053a743b6aa25efe8c85b1b91c403478d68b6d00acd679a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USKSV2305503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd031c845ac4dc2052ef2615fa531cde5113381374dababaff80043abcb2972c. 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/USKSV2305504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585994373521c08809ae76ef64323b57060f6e9d5f6a4567724b6b55d0e6544b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USKSV2305505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ce9e700799f400f60c971947d776038b592ae114faa463acddf674f9e5b3f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USKSV2305506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754eb14d27e4f1184076be602468d1d23a41900524b429b675169685774e0ae. 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/USKSV2305507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1467d5a4233c448a909de901d465f7e4dec6e9b87b37289442dd8a370e89192b. 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/USKSV2305508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb514c5738706bdcfe76dae63d8851a25a805ccb31e7b8f09b99e3410247e7d. 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/USKSV2305509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ac98c90125231080c2e203d5ad374b7bddec8b6aa0d758710070bc46488ddc. 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/USKSV2305510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74330dccb0a708aa99e5c9484b185ceba796f11da0fd7c08ea59de922ca6c91b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USKSV2005001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68c4f534c33f8c123e8f9a6192d8497656de5ae9612efe7c972870eadc52002. 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/USKSV2005002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d70a25ce7d4f656d122b9c2384ff9ba6192ed1fcbbd4f4a8ca715898ba75ab1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USKSV2005003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe955cc8cc68a241fe8baba9a88370d7c1dc8a59d739bc6f214071039ded1bb95. 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/USKSV2005004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea3b6417dcbbfeb971f8c90ecce446bd65ec5ca85e4fdd8fe93d4288f675da0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USKSV2005005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadebf22eba23a3e4745addf18a981bb91e0347f84e4c65c3b626d7074365f9f. 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/USKSV2005008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfef6b70f9ca40dbf41c738942ffa93da3a64703fbd0e81a543a442c523a7d7. 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/USKSV1804602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10bab3cd7571ff1c7e24717a82d351f207a1ead89168f681440c15cd22986d6. 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/QM99V2410601.