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 0xd827784bb6b80ef4e3def1c81452701d8d803d63b8dc36e33178f779805b00cf. 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/b9ee218e-4e3f-44dc-b1ca-fe74d2d16e29.json and https://artists.proofprofile.net/proofs/artist/b9ee218e-4e3f-44dc-b1ca-fe74d2d16e29.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 0xb551848b342eb4a68dfa3746c377632a61724665f970cf0d6f845010fd3ee56c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHZ31955210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551848b342eb4a68dfa3746c377632a61724665f970cf0d6f845010fd3ee56c. 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/QZHZ31955210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0124db9de639fff6d1125fcf74a23e28e9662dae6a413ce3036b5ae552fba4c4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM4TW2106822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0fd8000cb7c3e904ad8a0e5f856a3a2d22059d6c54d8cbc4bab45091428a72. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM4TW2117982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db32397de9ff9fdbd538bcca29dd21dc2acd455187b960ba981701171468e07. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6MZ2120304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890693c8d2d32a8f5733ff3d0d67362209e78a380f3743554399f62f7556da67. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM6MZ2120305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd4914368e78da51070ae5a6d7daa37b684dbc2d9a8e71164108c8685737786. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:22:26Z), 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/QM6MZ2120306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ae56573d85a09c94a7edb2b763a4ce9a7c38aec208ad886c42462e2a936ec7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6MZ2120307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8898debab33e4fe719ec09707d895e45eae34351363acc40d3a23eb4362152f9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM6N22282495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3a83ac5de520a84d15d372bc7e0522c0d8f75d65882fbb115939c91d75137c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMBZ92256029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff91e24a3a7c8f42cd88d5786940540fb14fd850c355c498d55a2848f41124. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QMBZ92256030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdbe905e237c5052b8151da7ac5812fb1878f3346aca2224d23ae3079330b47. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:06:04Z), 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/QM6P42207011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56422f79876367a2c0ab0d3b4bc2df1ebc8742bf198d84eb69481f93d59d58b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QMBZ92256034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd313c0900f66dd961f6d5ccfde3f9b768bb124a1bc708cd13185f7c9756f9619. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QMFMG2360482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd313c0900f66dd961f6d5ccfde3f9b768bb124a1bc708cd13185f7c9756f9619. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:08Z), 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/QMFMG2360482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09da9cc3a144bd044de99e5d69072510db4ba4eb58136af22a428b2f1a7388a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMFMG2360654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09da9cc3a144bd044de99e5d69072510db4ba4eb58136af22a428b2f1a7388a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMFMG2360654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99441c8f6c9af65fd9dc65e9384f40ef2ec6888236222a8455467c8d09808083. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6P42406543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93035d650e07e61a4a874e7930d5633d03509c92a1ce9c1f5fafb13655fd541. 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/QM6P42406554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93035d650e07e61a4a874e7930d5633d03509c92a1ce9c1f5fafb13655fd541. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6P42406554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e717c20defc1ed0e5f32759bcd7f5914631041d30172a57b26ee1c17c819160. 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/QM6P42406553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e7ab2e59f3595d0080060d5692c0c3baa43d1f0fe03af8afb59a69df56608a. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/QM6P42406556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93035d650e07e61a4a874e7930d5633d03509c92a1ce9c1f5fafb13655fd541. 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/QM6P42406554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e717c20defc1ed0e5f32759bcd7f5914631041d30172a57b26ee1c17c819160. 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/QM6P42406553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99441c8f6c9af65fd9dc65e9384f40ef2ec6888236222a8455467c8d09808083. 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/QM6P42406543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e7ab2e59f3595d0080060d5692c0c3baa43d1f0fe03af8afb59a69df56608a. 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/QM6P42406556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fafb59e0cd30d6b2fa0c8da5de0ffd8d638a557796b7a4183d2f6a14c6063d. 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/QZDA81805075.