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 0xc2a1b9a293ae3472d2c2e14062b8b65da2c6db3dac5eaaf3853ba533ea66179a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c875fed-b4a9-4074-a4f0-cf48fc068606.json and https://artists.proofprofile.net/proofs/artist/3c875fed-b4a9-4074-a4f0-cf48fc068606.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 0x37e6b19d6d8dbf42ef532c5e54384c6558171f391e00cc440bb6dad7a605c449. 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/QZFZ52104531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dcb47bb759b2d7704c3205b6e4459ac3c84dd0fc7b38a2784fe280abd09088. 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/QZFZ52104532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81807b0d559b03356fca32b026696d59a58707871a56c60b8937f32543a550f. 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/QZFYY2106786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda78d144c036ae68f2d2335fc743f9baaec54a1049c624f603806900aa06c594. 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/QZFZ52104535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5f5055dfb06fb955e121b8b860061c4b2201e959bcb17ea8fd895311372bc2. 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/QZFZ52104533.
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 0x899abdc819043c1c3e80a9bb356a7e2b489318090a113b2687a2248979e63f1a. 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/QZFZ52104534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb297fcf6fbba842e449647a9d6e3b9d31ece0cfb95c6e90ef35397f8a543854c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ52104537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2372c3a80ea7c3acf844a597a4d487e2463106aec6fdb53e6ff4d8da31d301d1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNWS2071325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba947310ccbdd88cc4ac1b3e8c141fb60d3b39f7c9891109a6e5b523080e22ef. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZNWS2070966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fc19dc76735b9543a13cc3c658f013cdbe8688ff6a8158761b14683dd02720. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTBF2425336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13d62f51e98900442c7674842d1a97849bac31f6bbb4fbed40f7988f5ad7c55. 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/QZTB52262358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf2d6c559a4563ef385139be0530eaf0ceaba5ad3f1215d17eea5304f92188f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZPLS2248180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734c46cb2f905245f0d4d26a6920a20ace1666f607b312867e864812e204a4d4. 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/QZNWV2255970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddf5cef299450d80a32fee91bd4196aacb7cb915cadb09ec5ef6b252d6a6def. 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/QZHN71953306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82841ad0f4634090a8d37c0833344a73cdb93e4e77cff71d4b9d9e0d6541a985. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), 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/QZWFK2430900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf236959c4064925d837871a1c3b1589dd01f6a0116ff6dbe45ced43586afcd63. 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/QZWFK2430901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad4a1c85d42a31f8a82f809a0479ff135993420b2b92d7d6f45337b9eb684e7. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZNWU2425781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa65bba7c1d2b107a6a7f5e32dea1fd8fc03cf0ad3455822721fc79d7a4cc77a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTB32414473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3134fa9717ae83128ef62d039e685d4f4b05b1220c4736d748eae359d7044993. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZTAT2464853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a226e80b1ca6d7360db852d9552f8e06fb0e7087aecf39f89dbc6ad3202144b. 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/QZWFK2430903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41b21dff75b2dc2fa1e5d62f0aa2dd51e0f5fa4cb911d6840a4d5092717451b. 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/QZXUG2300050.