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 0x863988715c84e2e9537571780d4015c177f39c6a30d494333fba1ce072fe935a. 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/6970fc41-311a-44d5-8d3c-8fa6875bdc95.json and https://artists.proofprofile.net/proofs/artist/6970fc41-311a-44d5-8d3c-8fa6875bdc95.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 0xd87bf7e032d4f449da3ab41d7ba9a93e50bb70ddb34bbc94c5c6cb60248f508c. 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/USA2P2322172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5563c7676a30ccfd4415301b2fb5dd71a964913586d73ab9e68693f6a94f4ace. 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/QZH5E2217617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf8575ca756c42cc8fe1fe5dedb0ba0776cd932d9e0f7a6643d8304fbddc531. 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/QZH5E2217609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79ee5da7f8601503aa818fa2ec03b1c16d56049f9dabff8816dca6479e2804c. 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/QZH5E2217610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad536aae8cf27acd7dcd2818718e02ef2f9f75dd8cbd9f5404813fa57d5c0104. 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/QZH5E2217618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a8315de61b0be0a59196241339c49d5be032df1b87a3208e4415ad300bff3. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/QZK6L2314421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935d6da100e18bbce283a4187cddd7c8903a13be80ef939188af891eaf4f655b. 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/QZHPJ2226839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972208b80ef65e50207d8ce34bb25ef226a5bed3a03747227c466389a961fba2. 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/QZS662230956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68609937f8b406268ce80162413509e8e660511a80233b1b6379b0d84f1ea884. 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/QZTH82163897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8660dc2b7f58fb08cadb3551be15b0e50aec7940cc6f9ebc317c3420ad5e33. 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/GBSMU0024697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2a62eb4da6f6e768a9b2e787041ee62a4f0d34aef83c8a2b16a76caecfc74e. 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/GBSMU0024699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c87b6a05e3663044ef0cb5cc961d537e2fa32c458b8b50e13ba10ce3fc15abf. 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/GBSMU0024709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197dd9946fa64f06fed0f7fb4f5803190edab14f4001197f3c7a79b85edb107c. 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/GBSMU0024724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3aae1bbe129550d10191f901cddecce0a7da304a9518bf72c756e8ee453e36. 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/ITHD42000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35268ae847934be9181a3be0aa4b7b1a9458c3861fb0f32a12984a9aed27184. 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/ITHD42000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1885669af8d304e4da4658fe9ae4fc04485bc8bb3acfa1154b00c043a1dbe7c1. 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/ITHD42000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8941c3a8b5b5fd80bdc5d4c6e90ab59204614b151aafd452d66c77c87fb003. 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/ITHD42000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4490c2ed4e360857128b5ea9e764328a328af4e57845ecba26aef87fdd65e679. 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/ITHD42000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8efd4b80008753736af406cfaf7a3629543a904a881bc27d1eb6fba19b135b5. 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/ITHD42000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e47cc2ac6fe4feb8b7c87f7a3f1e10c5c7f42499eda896b5364bb37ea7c1e8. 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/QZKDK2042654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571212739390b928f1c8589337d10fffbe9db977c31b827c0373a7e0f96db527. 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/FRX201955555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1977a9304481963ad74d3e8da27afccdf2dd0b9af9ff8f15676cb1af394762. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ5FN1768093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba3ff8bab767383e62f8815b63b6897f6708439b0795ff7f679d385da497e0d. 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/QZFP52431127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bc2b27855c88dcf0b4e7164e2bd7ce8399b2d8ec256765e4331e1361b916f5. 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/BXX7Q2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d79f8a11298fa442530c8c247c58c2a3025694705d76374a730d9cbae069c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BXX7Q2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c80f4c5bcd5cc1c01d4c0e32cecb9bfceb30c18e397fc6bafb07076358c3787. 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/USUYG1196838.