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 0xbc0b17c850a98e5e240e5013f677cb00c523512995b7f55a055b01cf2dd2bbd8. 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/f63fecc3-42ac-46ed-b88f-c2101f7691c7.json and https://artists.proofprofile.net/proofs/artist/f63fecc3-42ac-46ed-b88f-c2101f7691c7.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 0x18cf0a810dd20980bfa3b0c4d42ffd2602e1d3003ca82db7fec294b74b4d4cbf. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIE2494976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee533e4d3ccd8b53aa56d1ba7820f71fecf60544514ce2fd4c09a7df39b10c5. 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/TCAIE2494987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e302121761768abc0b372ca2f250ad0f78c63ec443e600a9f4584225c3bf3e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIE2494991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a3a5e9f54e36053ba05c657075ad6179aed981f1aed89671eb549a6eb28977. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAIF2494967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55873445f756fc76c81eaa239999b97a2a0ca52b96356616aa3dee3aeabe61c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAIE2494996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236cda69f5dd56543f6566d8071b8241858dddc69e55dbc52a105fd4aa64e95d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAIE2495005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf482d81ea31744b5635620a751457a0e58d2d927571e6b089958ee5a98b66bea. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIE2495014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471c5b56940d8bd250c98f9300e4394c44716e3b345dceec9c665b32a70b68bc. 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/TCAIE2495024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb39d93cf883817e306d6f5c98c28c7abc3d4c3bbbefb1749a2268607a7d32. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIH2466959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc530cb63c1f8c23374263b1b321ffc3e4dc627910afcb0d678b6801c0f2730. 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/TCAIG2466969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aae3933f149b68ba97dca5998f52f729aec17a1f2258be263f86f46510f9fc8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAIG2466975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3216efa71afbe77bda23450c0aa1cdc5c2fc0add5072fbf4e87b11a3b34034. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAIH2466982.
Resembles Something That Has Not Occurred
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dab934a6f38cab0eff77ad11d61983d62d76e4f1ce35764f38e819a3d6d3f43. 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/TCAIG2466990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2fdb667113a2586568ee8f51ae6bf7d562f3dd38020d0d75d13ce88cff4bc9. 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/TCAIH2466995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e519b6ee8c523ea35b2caaaf8c2c9a817b8539fd9f3525e1d52a12beb32e0b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIH2467000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e1bcc43a3169cffbcc9e815ffdc949425807ba3895b44a7ec555469736b7d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIG2467012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719d44c7f8e80d3491e80fe5a3f0bdd4639d0efdb348b1f881fc968ed33c0eda. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIG2467023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6a147a79badd2f0832df5855431e2e9bab45feaa8e233a6c63b1e691b25b5d. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAIG2467035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac51df7a37dcb8294daf580b4ef9c84b521efb30d78fc91e026f6b948eccac22. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIH2483496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31038793f08f4a32917936cf61df6bc0ec05423f234674379290928c77cecf4a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIH2483518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a986b9c47c8950f56469b525ea4e019bcf425ef2d88a6c841b55bdee056f4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAII2483525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8322d7fe59fd26c4f287e7ca5de82d78fae830f2cdba5cc911c42dc6595be1c3. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCAII2483536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc17be14763443dff6f08469c47121333bc199ef7b49a58b3211fc060822a0a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIH2483538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41581945855bd3b6db201591cd8bf672ba204511ae30453db4e89b7817d11f9f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAIH2483545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5783239454528c8eb3e5b96e98b905f41cd4f2aa962ae000c57d1b718d1a0f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAII2483551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a0646323514995a21f9814b03fa1354ed979621fff804c93fb6eab4fdac0b6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIH2483556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4956a4ab6eba6fbae4ef2d858945367774f0dcf318a701967e221f5d77794abd. 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/TCAIH2483561.