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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed44c4cd877af62df7c4ac45a13a8a4d2b9884b769c0610b4ebea227a8a38803. 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/590d6cdc-8331-4bd9-8e2f-e3e0dcf0d203.json and https://artists.proofprofile.net/proofs/artist/590d6cdc-8331-4bd9-8e2f-e3e0dcf0d203.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45b800dc392c2fd76231a4eade4627e9a559d9292b30035af62b27f7eb042d8. 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/QZAKB2431638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77101f597b1eff194b097c344932489a0e0c709f5c0d86e0073bc2c2de8581f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZAKB2428158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0eac0facc27fcfe8dfe6c4ec4c15c8e7300cc13d6058d6de8b2f617d41c8c8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZAKB2421259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930009c365442675e0eeb15c7858c2cf31b2e545caa59ad907493a43d1f26442. 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/QZAKB2421398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0af7a7b5ee9027ff0350e803b65b4168d2c5622ff448c99b6cfaf0a1e190750. 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/QZAKB2418198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1105ae55f18703fce027c7423e3848151d262ab0313b2f94ebe5845ab72eafa5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZAKB2415539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc346b3898c1dc99935fb01ef8ad4c8a13866bd960e8e23d40e4aa1143e20eb3e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2413163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeded0e0769a529ff4395e917661df91c6ff2748feab64933bd7ba2c1abaac94a. 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/QZAKB2409968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eb7b27180ccb3b1517148b8a2f05c2518a3619e41c4886f2e769d2c7fa0fd3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2409221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876d028363ddcf463e96c416406d9bf0c380deea95231c9e1a438ebdee936bf2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2406404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe318ef8681359e1e2baa6d4623069322fb24b2179ccf60b2fd8c19b388c2e202. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2401422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c77cfa3741962adefb1ff75f589230fe96f14cbffa2aaead952a6d5b99162e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2400942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a4f1ddd6c20ee7fbd76d680502990bf5a132ba3cd5a1e630867092ab3e61d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2380930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a61aba2182e23f3a53f2ffa282c56d3728837c22f9e44156858948c2b2ffe76. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZAKB2379966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8b3e14faf5b7527252f4fa6060144d03763e6034459030296875b5701b8bf0. 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/QZAKB2378450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02a2657f1894a8eb1670b161a0b2ae4bfdf6287c60d34d554ad217dec7ccfec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2376936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994142008958e1b56452c6feb41c5c1c63a753486cdaa82662a5ecc63c5d382d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZAKB2374278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc211d71d7d0c245cee59c506b4b112c9cb5fc15ef378f875170a4cf325cef609. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2373310.