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 0xfdb886485acf2a63aeda1045b514c0cf7e1dfc8c48a3b92ec18c3e929d9adb6a. 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/444de2ca-9cd3-4cab-a622-d9f12eea598f.json and https://artists.proofprofile.net/proofs/artist/444de2ca-9cd3-4cab-a622-d9f12eea598f.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 0x2f186eb933de575e3533e6f0a927fc61ee09d0b8df624d0e7c27d03bca37764a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BRSBS2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbdd5dea41bc0e143b5818fb1e787819c6683e4a3a65b1797a7dd0248f8d796. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/BRSBS2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed0900a0aadfdbcd2da54f9a340666f731f3f150b2ac330eba335dd152d1710. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/BRSBS2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5018f7b440ed89c063e565c7727885bf0742652734567120b59fa35692e8b8b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/BRSBS2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5893240df539e3951c29b0e9b0661a39e03588df89356f5c0afe733c6ff231b6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/BXNT62200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd2d6c34fd80d5c155fea6963525edf1c296ffd9475e7dbd158614c917b8592. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXNT62201700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d41f6cd8bc27320953266f68e8995d6b6346ab1153ae54d09ce4ecb3e0b8b24. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/BXNT62206705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dce15cfd582cfa0cc82d707586c6a39b74b740a232940d1ef26038d1d9efe1. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/BRSBS2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5af3c6e2792134ef4e69086126b60d80b3426c7ceb1f68889cefec7b551d8f0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRSBS2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bdee6b4d6d1838e72141b4022d1d88fd048afca87698b04482d9304fa061a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRSBS2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c338cb1f9497c26d6e1772ccf4cfef270545b01ed827142058a63946a43f03. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BRSBS2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda96b47cd96e38dfb3eb20bad0e5cb93b6914de328233cf40fb07e2b578d60e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/BRSBS2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dce15cfd582cfa0cc82d707586c6a39b74b740a232940d1ef26038d1d9efe1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BRSBS2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95751f68741b5007c4a80dda99089ad70768488c962f7cbea0354594990576a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BRMK12500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcd4b511c2915396ac7e465bec03e43b9b7cb3bce11520c68d5ace10e843b5c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/BRMK12500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0f036a134502cff15f91ecfb11e7e0eb4886540235f659493e0b13e3099543. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/BRMK12500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea3974ff76e719ebd2c75143eca139fad3851a14b642146de1cabd800a9703c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/BRMK12500005.