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 0x6e2845429b54f6682274df01ecb48cba6cd5963cb242033cc80f75eea83aa113. 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/c44a3f8d-86f7-45e5-9480-e6355dafd9f5.json and https://artists.proofprofile.net/proofs/artist/c44a3f8d-86f7-45e5-9480-e6355dafd9f5.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 0x1a04d4c7a0f9db40b994dd302d0ed71398c2a1a1e87796b5d3d3a507276e3a03. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:32Z), 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/QZFZ21976078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd251f180b853b8ad08ad808ee0a375c8e09f098e1b8cc874ff189942a5d6d6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ21976081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4b5297cef59b570583b52782200b0a5344071153e66ec51ca9aa293104519c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ21976082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb33c5d7dbac2f13b71a20b1ffdc3c6d7d8af41eebb41457980887d0992aa52. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:44:10Z), 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/QZFZ31929325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6499928306d158188f4ae06e6822bda0d41e9faa140ab97480c0bb7017b8da1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ31929326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b687d5b62538dafa702bad50482558a5ba1ca57a704931f8aabd736ff15f18f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ31929327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73e7d6d9fb91ed30c467c7dd52fb253ca72df29362c4f9c6d401d1815634144. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:28Z), 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/QZFZ31929329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d98a7d989b4e0396ee243ec783418307020cb974dfcf6044f15d76d4d5b0b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ32015349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1d7573f9345727709f011f713bc6a1f9e4a0bccd318945362ef607166c00fe. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZFZ32015353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4e9db73606bfe899e4597939aefdac72a8b27874898a1375557e25a3c84399. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ21976067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cf589ef057df07a3ee892db17ba891f932813f83ecb885793910410fc47318. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3U81700173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf522386e0f06b16753f662ee8c3a154080d53c6e0c3f70313310da806eb5613. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/US3U81700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6049d9119925bb460f2de70d1580bb0f4ca578f11987c52962b0e93d052bbdd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US3U81700176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79316092c525ee3e69028f67476c6c08d4a6844c0c810a0f70e4eda88fc0372a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/US3U81700177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3a56b3ed4d397fc57f1ee49a4a58844fbe40fa97f5e867f8d24e5a8761de0d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/US3U81700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ad704bb3f1d0274e7fa813f2852fe1ebe6ee193883ac3a5ebcde6ee0545356. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:03Z), 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/QZFZ32017066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ae864b5de8840d90ad1c8917385c570348f197e996ffd3a2a44aab7d7af21b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHNC2261625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420afb9d0e69fe54841c0803c067945d4600b702df53d064eec259131f7177cb. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZTAU2281807.