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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8ebb85036dabec02efca685be0684c716b0934044a8966e2b551f46f3c1abe. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8e94267-2274-455d-9eb2-d216b8710075.json and https://artists.proofprofile.net/proofs/artist/c8e94267-2274-455d-9eb2-d216b8710075.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dc4d2b3850bc3aed9cc77f42fedca681fb33e7d06bd1a038ee5929eefa243f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:26:33Z), 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/FR0U11100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a7faf6c4fbc90faa6888b47d5d0194c3b7f0a044934f13ef2df44eebe12de7. 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/FR0U11100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1097ace4519e967e0a693c452572570251b443bce5ab20c922c7d00dd54b461f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:20:27Z), 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/FR0U11100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428eda882eeaaba6779570a82d675e18636db09775e199f42eaacf299b077050. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR0U11100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e28f06ff742b0c1dabdf163855ca16fa6f57312eb6dcc087cd426b6b74246e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:18Z), 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/FR0U11100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa00e47e421930424464c2196d6c508caa98c36c55036c6af92120ee4cd776b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR0U11100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57919270454defbc1a7546de54f5f4de6b32e2ef9567891d1bfa500c1ced5d0b. 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/FR0U90900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000f95f1f6e72a1c0b85896fa716821fa14229a93187afaad2fed17b1e400ace. 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/FR9W12229258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33276039135732b1b670b2adce54f16358fb9f6998e9a920e35df411434d3688. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRPIW2003670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cbad8f670867da094b327a3929134f206d05e3973aa05b4eea3d19a7af9219. 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/FRPIW2000220.
Flashback (mixtape retrospective 2006-2017)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca962ad89a5dd0031d3bfe59cdfced4d3c399cd131e6f715bc75ba20a7ece9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRPIW1900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76b598baa7eb6b50adb7f195d8d79023e061f2f73849d342d76edf4d3f7fecb. 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/FR0U91500522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81193d56085fc389e42adc5fd90600841bb905d17effbdc3cf76e50d704b8887. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR5IW1300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865a91cb6ef78b5658bd6f1aa1c4df1c859d465ebbb7a20394d403267d169e41. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR0U91400605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e089c8e13561ee006f401b084e5c9fc6f106ea589210449e703653a7a03d720. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR8GV1922300.
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