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 0x04ba318e11eae83714876d3274665d6fd1e697bdcb4f2b127ab41ec9bb22f04a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7d5e033-23ac-4e6e-a3c0-b1b5723c6540.json and https://artists.proofprofile.net/proofs/artist/e7d5e033-23ac-4e6e-a3c0-b1b5723c6540.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 0x9547bb5af7284f578ea04f01dea0b42313e731e3a091dc8944ad9de6015b2627. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:28Z), 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/FRX281991621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db4136584e7561c178e9a36f17829f60403b7e39987536ff1133ed8518c9d7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX281964605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4056ff05123c310aa5cdcd95d29a261f7503cc0fd66cbc92f8c5896a5aa790d1. 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/FRX762042770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55483cabdf5b1b92ef270911ac845e77b6b374f2358c811458e1ee78197e3077. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA052070032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e296361559f781900f5d38368d9b62fd3cee17ac87536ee54b98c42f965a2f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:14:32Z), 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/RUA1D2572245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc77c00d92d3337a2c01592e738d83b200106182dfae9c419d5d0508a081d09. 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/RUA1D2575058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcf92fafe54f1029d27e560203c5735620ab94b9bcbaa25aeb74c7d1e8b44be. 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/RUAGT2538011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ad29e7faaccc25045c99b9b18f7db22a4e702638c7275e0e5a0c4ebd1f363b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:47:25Z), 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/RUAGT2538012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814e98fa2541b252c192bd0fe932389d0e075f2f6354a00109330a89c20b0693. 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/RUAGT2538013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4420af1055e9f72c5b2112460883de6ea92df3da86d883adc293e1c89a7275b5. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:18:45Z), 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/RUAGT2538016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a25df16514ab0dbf7bccb6ea5c7624710a09611b335dc7fb5c38b9c4044846. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUAGT2564235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f377af0fd46571da9b43c2735d8c140e62adab9930f24f92ba9822431c770. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:30:46Z), 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/RUAGT2564236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff8924ac3ad9010ca9ebcbb697e01d735afe3406892a6fa7ab84148379ec84f. 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/RUAGT2564691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b29c0c0ab8451fd1d0bfafdf5c9938349eab1bced08d9ca022a8f1e208a4fd. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/RUAGT2564693.