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 0x5a0098c4fa92307e7fd41e962139fb86eb33830a278323b30e00d2bf8009e08e. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00df141b-9aa2-40d3-bad5-aed7d236871b.json and https://artists.proofprofile.net/proofs/artist/00df141b-9aa2-40d3-bad5-aed7d236871b.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 0xf51eaeaf0c24d3ac228d5ee1c2e4d6d8086273718274bc73be3325ff05c60fff. 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/FRX201794848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791dfff37679ed8d20863fcdda4e08d3833f0a93643e039b10e42ab29e6f8ef3. 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/FRX281702323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2f3b00a51cf0b9a655858c0b02fb6c1372ea802fb131cce266e9f0d5d6e92. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX281702324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef0bab1f2cdc5aeccec5f1ea5905ef640cdb1c94458ec60d5762c96d1ece18f. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRX281702328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b72a473555aefdf7c0985b1030286e9b78de440a7b308d93f0356190109718. 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/FRX281702329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b28296e102ee95cde8cacc795a82d747d9493e8c6fa7dc2b1ccdf709feb9f2f. 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/FRX281702330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6d36fae64c8517fbb91f217cba2df693d5b8275e79e8353efada644a79e59. 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/FRX281702331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5855f20a8419231f7d75ccc3be59e9b4fac0a4a2b7e2fa6d8f90a24427501668. 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/FR2X41784793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca83619ea6cde2eea0151a435cccb49780a97bda2f733d0778eeb47b8d977914. 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/FR2X41789761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e0eadf81abcbe5ac2eb469e292be533d1b1a19f8321c10f8ab91e684c5368d. 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/FR2X41789764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd8fadb7bdd703d8fe966fcb5106d9bc985d0906550349b3bcf045da3887889. 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/FR2X41789766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e57b6a8e4179286eb33136a21bdeffea8c8c0f1468e3dcc7ff42d01c6ff750d. 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/FR2X41752755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f4b4f68c7b7e5eff8860f5a3a611f08a79d1b5f82288b2b0c68b9e43ed0408. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FR2X41789770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ce59de1a922fec129b374f88a8243a28a04aee4ca38751cdd23afe51507334. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR2X41789771.