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 0xc973b6341e2361e1d3eee559be279c36bff21a736fcd25a7d5e58e2beee122bf. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c10674db-9e60-4936-a104-2ca8e6263d1d.json and https://artists.proofprofile.net/proofs/artist/c10674db-9e60-4936-a104-2ca8e6263d1d.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 0x1187f0a04199f2e1a242192a2e0a36df7f8ac5042a1de83bbb54c2e0cee0b519. 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/QZ5AB1642729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111714a97a95507616eb2acbd29a547aebe7d86ca85d8a77cea214b70ac86c00. 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/QZ5AB1642735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301c7286b1e2c5ed5ca35d1cf095000e993e1d370b2ca20f420f1a35efd386e3. 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/QZ5AB1642737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbace4c8cc7fcb4f0b6e6adf89668dccc356d2a1f9721a77cd883fea3cbd7db6. 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/QZ5AB1642739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5ecae9e02f599262494a89548dd828337d478b111f19ec467c377e45cfcc68. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZ5AB1642728.
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 0x1e5e7340a5fffd20c6244baafd80a2f4c66788894cc27ce8b801c270d34e3a89. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ5AB1642730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c20f75b6555133e4314f8b77035aa2d8fdfd03836114dec04f214e5f36e634. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ5AB1642731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2a4a1ae076568d7177d212bcf865ee835be54793c3140953f3633b71029747. 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/QZ5AB1642732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8885cef4b1ff8ff9bb17cc2eae1d3e93670d5b52ea6fd8b2f8695c7392236873. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ5AB1642733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33127895ffbd0cad37a666efd4f3decc631df7d9e8dbc699dabc7945ac1fea1e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZ5AB1642734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56c3f236fb709e6d379caa7b326cab90f9f07986f9ca2cc1bdc0969b556857c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZ5AB1642736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f613756282243ca7339130aa2873e709fdae150a51def5a78faa47991029a24. 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/QZ5AB1642740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52417f0060edde4b4747ed7ed7ef3306d571f66f70deef27ded0480a7fd3a668. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:47:39Z), 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/US7VG1706851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89235a08d4902bec1c7e5e8fb33a2986708a50d892cdca636d8ab279b6d67e7. 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/US7VG1706852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458449b7095d6cfd308e1a072f4d79a0e7215771064bb7da801055b3b0bd0836. 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/US7VG1706854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf415320ee595ed9bd78ff860dfee9b4b924fda5dd721b5a7ab0921533a2d7da6. 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/US7VG1706855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb32017a931d183d77b5e0e434452f6f7289c8fd36e908f3f0dae79dfce775. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/US7VG1706853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b928c83ae446aa397cd443f885b91938567c764d81d5af58148f29408bb6d6a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US7VG1706849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f65376ecc7af489d2d9db0954620519666a0e6ee8e8689184949ce12dd45749. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US7VG1706850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c79a516fc9408284e5c6d46931f7138ffac770131de5bd1fabf87d2b1525d. 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/QZ5AB1646845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf7abf59d852d81ff7c7d1687147402eb2beb768b56f52645a89e6ca2e50ebd. 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/QZ5AB1646846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69898ab4c09cab3b35bb74c3a7425ea92606905aea66d0d51793803466ca710. 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/QZ5AB1646847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b513626191ae9c6ae8eca3d869476a5b0c48557e1e3a35335706fc57b40eae0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB1646848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc43978f47e4544679430877e4c79c3509d7eed3c57e5159d2099ef8502de2. 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/QZ5AB1646851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165303224fd77ac7c89d7366ca7982f2ff8be70a651701bc2f34f51ec8c017c9. 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/QZ5AB1646852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c88eac666956980c1f634112e83eac68374504978822035e77a0fbac6351f5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB1646857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd826059c9db68d802e0555ba3abcabe41be7a39a4bda81c7ec922a7f99b18ed0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ5AB1646849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c7679905d0f0204cdf0f6710525258d51f3b29373290e94ecc31334835ae95. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZ5AB1646850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf498d273223727d88367252d5685056f0fa333a62aafcebb52ab6a9d05d18acf. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZ5AB1646853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bd28b9e7e5e6408ddd0d19e28d03f72723b5f42c7c6980e0830d1e9140dfed. 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/QZGLM2463378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358660428059e56f48af20d0f68b0384814db71d9f719496e596abdd9f61c969. 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/QZW9M2343482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd02f7175a95b52b6409265c671769a01171c72f9fba394ea438876065763cb. 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/QZNJZ2305379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eff8a637746e496d008ac69c220df4bc979fc25253648aa846ffb3b78fc196b. 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/QZNJY2393837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26031bc036a727da02c57c78de3246135ab69542299b96c9bd78a85b912b5b4. 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/QZTPX2240443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dddcb85f6dfe7d4c42f47ed0b5afdbba570a75964f402288ec77013254ddb2. 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/QZHZ32093683.