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 0x047154390d934fa65e0fd74d92c46eaf260331072796c2afdd764554d0e0bd0e. 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/c505f0f0-f7c5-43cc-8310-1af962b62d1b.json and https://artists.proofprofile.net/proofs/artist/c505f0f0-f7c5-43cc-8310-1af962b62d1b.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 0x002d3913cb3ebd0b8b64606c4fddefcfff6e83e45af8ac21c63ee15364d5a5e6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IL5842236831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abaa2a5faf5fe2a061451160d6d728c16b34469e4110ad938b7e8243e4d40b8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IL5842236832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dd7dbbc7e0f9e7bf73c228cb20eba254f552a354d04db238e05a5de7ec1358. 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/IL5842236833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928c348d0ba3338c4b638f981032dedecea1744f1babc7815ea5f6b63cee7eaa. 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/IL5842236835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841093e9f177a3160be39c66d06267fce9507fa23bedef55771c3d2cbdb44a62. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IL5842236836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177c8cee200856eb521b4bf5829a7e893a4422b1ea011bf28d0ec47b240610b6. 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/IL5842236838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d15b84690c5baedf8eeb340a8d518c335f6fc0dfd958065d453b97c91350b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IL5842237551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45d46a6968759bc83a0d1f30038ecb3d2cc472058cff42c2f2ced28576aae65. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/IL5842134924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3c31b31e8845ef1ee0d2e37cbd34200e9696f3ded9add6e39983603d39ca74. 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/IL5842236251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0e8abac0f70811afa464860e0b89a8201f6d375c0c2f69e719d8da206b921d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/IL5842236765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d15b84690c5baedf8eeb340a8d518c335f6fc0dfd958065d453b97c91350b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/IL5842237551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1425a426a617292e2ec03c177c4ed453aab72014bb52e80acc32c19e162c33b5. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:27:21Z), 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/IL5842340631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8097185bc520f27b0515ee1e06c211c91dcc6d8a0218249cadf6b90a78f4828f. 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/IL5842444525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf9e3f5d4e2325b291e78285d63004adad1263b677e56a1c581370444cf415d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL5842445800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26b60238334d594a7f1f833e89a41c6d650217a491799bf402f422c7f252f1f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/IL5842552443.