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 0x3c59af9efdba62a792e62e72295bcf813551a3b3f896c824a441e58edc476956. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca8843ac-de89-4755-91b2-4ac07a333f9f.json and https://artists.proofprofile.net/proofs/artist/ca8843ac-de89-4755-91b2-4ac07a333f9f.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 0xb63ccded19fd103da57f3a1bdeb8c18decf226ee49d7f23eaa427a60f0908693. 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/TWAE32100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a9eac10cbbd48c7eaf95fb0de11027e7ca973bf82f3d62e2471ef1687b348f. 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/TWAE32100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39cf0c6b38814a9e58a27b9ef09f3304e2eb34ba8314f2a55126fa928da2923. 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/TWAE32100364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe322539c82f0531b05023fbd7b859266f4a83c93aae57c4f618f38bf8581effa. 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/TWAE32100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc2a0c3297865a801bea829915936d8b75b2e4b16819d7470e1d4c41449010e. 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/TWAE32100366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71d1469c726a129d59b6922a330a845b351891619791388c95e76fbe1e63af8. 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/TWAE32100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b13ed1252b31925cc53424a3a1c4e44122a1f28c1e0df32301168380da0a89. 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/TWAE32100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aafb6adea70015afd007ed3c4e4be1912acd58114fb7d01cb3b9f72df4ac61e. 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/TWAE32100369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1a7ccb724ffb9cc03ad941d1bd753930d372a0559aa26234664d70ae86761a. 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/TWAE32100370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b9ecee6c5744e464c76d52d8114334fc0d16cf44a220aa501d61e842fbf358. 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/TWP011842101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb501b741ad50730f323b7e957187abcf736a694e4ac5ad58fb7e2b441fa5b8. 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/TWP011842102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d98823e27cdb806e8a11af4b842336ec0e1554b928b132a4450f63c9e1f14a. 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/TWP011842103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc19fbe261011bce076feb035fdc163c9defb4f7b8044ecc28e6492ef7a5e62. 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/TWP011842104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57685cb1306995169066bfe1f8ec4514dd5acac01db8274cd09a4c8d7e37d0dd. 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/TWP011842105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed8d71f7aad8d8d6f1944e56a27ac9ee74d70c03dee111281d969c7b962a306. 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/TWP011842106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f81b32fbbf2a6fb7a73aa6e50ee584e44ce07db1f73024c76390c1788b3c59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWCC32302264.