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 0x08b72679ac62ab0177ab349dcc12c9f25521ecd4ede6b176b434372b2cd264da. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2b15351-8ed4-4497-afc0-da1b7bb4760a.json and https://artists.proofprofile.net/proofs/artist/b2b15351-8ed4-4497-afc0-da1b7bb4760a.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 0x0fef4d03e8d0c3f5b84c6c7e360bed4f3f2aa03d48f948e597744c80d2829d39. 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/CZA232300689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cca2d77b3229bf902addc85122b508defd3361b955ae316593d6c315be68290. 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/CZA232300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5303572bb06d1a5e3108cbfbd869c4c335463505ded184799724a00a131880b3. 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/CZA232300691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d3d4f411daa64112b50f2ac7105203d59f9798516e208581c176c13ee04c7. 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/CZA232300692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74e41eaf0cd78fd367b4e30fe4a6ec4bff77fba0b671e19deb698cd548e92f3. 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/CZA232300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a863e83be25b599c98b67356cdc87cd3ca144ee4475a09b7bfc989ab365149. 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/CZA232300694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029038a60d63b8489a86d1c5ad2e58b34bb5fc4281196ad95c35da228a45b545. 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/CZA232300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc9bc963dc52cf7c30b21e8ca475ccc1a25745166149be53168ec45823ac423. 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/CZA232300695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029038a60d63b8489a86d1c5ad2e58b34bb5fc4281196ad95c35da228a45b545. 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/CZA232300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b18f7fd51ef31a1ae6d85867dd3485c1af339aa3c97ea58a25a12d2314c7a0. 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/USHM22349556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2cf380455ea8793375e2f45c6637363df83b8fd05709ea0a779e3f3c058534. 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/USHM22349557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b7c733ffb76bc4c222eed622ba0a6c86274aa82a125aab290a7d9ddf5ead5d. 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/USHM22349559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e8d5241a11b1961549b210bc6a1ab5adf26a23c434dc8e57123836148584cd. 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/USHM22349560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe266ed360b672ec9f18b197fde10f4741220262a6fe3cb38bc752e8207efb780. 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/USHM22349562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b35b95d322c0a4ff4530ca5fa30f0566e612ddefbbd3c9a407b437d2f09c61f. 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/USHM22349564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65469094e2bfd52d7316e1ce53a931070b299af82f531d893f40e44efc93e18. 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/USHM22349565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e02bfdc962c67a3b307d27404d20d961d68574d0b963ddc36c5547cc8d75eb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USHM22349558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb513b884c9cc515fcd9a8af9960f5ce181f2a620edfe75e954ea8ccef7d080b1. 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/USY282006634.