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 0x21d87c209426de1337a64dbceb2395f4ec49363bb80514297dc5ffa60b4229de. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc36b627-407a-42c4-9769-5d08b40efcf0.json and https://artists.proofprofile.net/proofs/artist/bc36b627-407a-42c4-9769-5d08b40efcf0.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 0x604dc6802834aa6b5abc27f17719d53c7495511e80b05e777347f6ac7d861b67. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BKIDD2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faa58892bacbeaa92572db291dc962c13bf9ce40be78e709a1b94e21af8b0d2. 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/BKIDD2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fbd9ff2f481c0e3268a39ef7677957563e040ef7e0533da52805b1ff70869b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BKIDD2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd970936a62c726df3691389f8f8ec695210b9bee4e9d53b21cbe5fbd311f25c. 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/BKIDD2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0215e6b4e983718877d651e0e1155a157186ac5b6b4fa48cc5e4f1c9920f50. 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/BKIDD2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84309a80637f76e42b81b4f4ca0a9a4288041cbdee71b259175db5febba09187. 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/BKIDD2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33639675f31d37f2b9caa86f1d1b99776626a364771ba5e1b830c7e3287912f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BKIDD2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377fc49825135ebd072bb389e93300ee27ea7420ef7b09abaa3d1428523a9007. 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/BKIDD2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d545514de4b9c34f9123debf881629062786c57d5d303f51f3c5df48e62feb. 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/BKIDD2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dafb2106191d781b90c9691a106daa69d5e8d1c41c271a299efa005abf6bc4. 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/BKIDD2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae32903f8ed76291f19308de40e43c7ecc556c97ea3371c4dfbea21221e6e1b. 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/BKIDD2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00303fe396db2d7045634023e14d9e1d69e95e79b3d296fc43e0d33d5c267ef5. 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/BKIDD2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630a5811e1f7850a8df4bef14581572690467651ce6a340cabab9cc4128f9fc5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BKIDD2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebbb1a7974e0c0fff20daa6c940b44441280e956583027fdf147c02758eff14. 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/BKIDD2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1929471dff178993269989fb1ae506bf2fe0569f558cc4f69b8864a8f1f1e4a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BKIDD2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44d10469b9290ecf89a21be9beac17bd1300f7bcc55245f3859c2c95cffad71. 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/BKIDD2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ac9d1bb9b890d1113cc944a5ac7c7b6dbf8c549295c586f251ddf53216448. 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/BKIDD2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5064a73b93f404fddbc809858d84ce392161e6a3a935ce84ec80606bb1157b. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BKIDD2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9feca7abee9ea1730ad28b4deed4d58e8ad73b9c1ef2d164f3f77854714b4f0. 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/BKIDD2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dbcb97121c660a8d1d4735a48193dd4df8f7ab5f856fd741ae3315a67d589f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BKIDD2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b6cb6859305cd738de1e89f72876e8d0e5788c5f6edef082e14f38fa39bfa1. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BKIDD2200054.