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 0x9c2d2692b2e7fb64ce672e4c7c5560e03d3995374cb6e1bf3b441e8a99b6a56b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87b3b918-a91c-466f-a3c7-72fb7e82a107.json and https://artists.proofprofile.net/proofs/artist/87b3b918-a91c-466f-a3c7-72fb7e82a107.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 0x65d452bd8ef62d5fced3b7a0aba81f91d7d3c61f2726fffe2f0829d6ce9ee8ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S1984290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed37513d493a36fb1adaf433c19d7b8be535595da98f8a59114b6e28c17c769. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR10S1984291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e54ae5934c5b92118918fd1e0e67dcb09df323e0f1d2d1c983e2cf387cce64. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR10S1984292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394b6cdc66507ed3c88ef927f0c8d16bbd9982679f0265beb37e89445d0bb80d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR10S1984293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734a63c3a1b04e78f8685aa76570960388af93c43d6705ced4c3877bc47da3e3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR10S1984294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1add8cb7de00e64b10b1f6adc97554e9ca38bbb6e0e0b6af7c1bfdc98dddd98c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR10S1984295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954416de81a2f5dab286d3319c058c9a8c53e190646fcaf76fb7895638a138b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S1984296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde86445d1f8538d7445d311ceaba17929265b3ef5e29e61d857b19a472dd192e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR10S1984298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5309ed4c6b7a7508c7436a8df91b29ac3bac4c8a78f23d054594022fad31f6f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S1984299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbe8594764cd89da9b30e314bce68382026a5121686dbbbbf3ac4e6aef8eb66. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR10S1984300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee539b0f8782094a876fb4192d8e2816f954404f3418486781e31ef4f839eff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S1984301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab08a6c0b37505d091d5daab414193e6caeaee62449b6ce4197f0a465ea8d6c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR10S1984302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d5f8d7aa6cf4b4870ef86262ce5cb66624047ffd8ac1ed634b36073c04e536. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR10S1984306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfc5915bbc832ae89b486f9af889b80d87841187af5e2adb2eeae354187cd83. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR10S1984307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971af181bbfb06cd1292451d816fcdc095559344f81ef4d0af0f5dbd2ba048e2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR10S1984308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d1a053efdbe8a14c1b2a1605a89dd84f3f96a679ae8f2d7be883276e2f7236. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S1984310.