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 0xadf8e110e1d478f1d3da307c66e1afe12865709813fa8b269d86136bfd7669bd. 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/db28582f-b0dd-4192-803a-58eaabfd9637.json and https://artists.proofprofile.net/proofs/artist/db28582f-b0dd-4192-803a-58eaabfd9637.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 0x86767e5c16275517c751e08e7eee43490aefb590f1b62405d36c598092820c4d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USX9P2405618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b0f1f85d58dc79bacd15cdc22747339db1227dfce8af1a3b52ae67d4b10e5d. 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/USHM91352244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaad83c6abbdd0d5e5dc1068c4e9cd23cc7383a86e974d55386155138548b79. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:14Z), 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/USHM91352245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2494262bb176dad50eed9fd677ac89cd53c48c21f06eceba91ec029d8713d953. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USHM91352246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c268a1655799d3d1a7732ee706139ab00d636f15b950c18b6fa2fa6f52d8b9c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:51:32Z), 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/USHM91352248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59208f62b87072d528d496acbedd41b658a3a2627cb14f727d8d92fee63ba90b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM91352249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e0dd0de48cae8fd80496e958f332a623267d4e8a9a1c33a4c01d308541fed7. 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/USHM91352250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7184867d758650713163123eb208efc4768501ee52667cab8f0424bb6a9fd33. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:38Z), 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/USHM91352252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6a4be591d3804655911a25016e9648544e0cfe609ed0c0625704bb65e4f4ee. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USHM91412251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dc6d4bed14a540b8ab87ca297b9abff2106df4d6827cedaa3c275170da86aa. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM91412254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c9720a4821c42abf6bb88beba31c19d9fa483328c321d8c141c96ff07f4ab7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:22:48Z), 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/QM6XS2000539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a05448d82c1dc0db381b28cb746e51047c8b71f02f01877fdb1d7b2f4eed2e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6XS2000540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b71deec9b4bb24eb55d1a9150511918e1857bd083e5b85b341c5d6c607f9850. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QM6XS2000542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95990a66d470b8d83cc14c12aec4d2e00d301f555d213e2f9a9e6ea37afcd9f9. 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/US25T0614710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2963be0ed687786de6db14f61b94bf6f01a2f5cfb397e9691032cd45e0bc89. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:17:25Z), 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/QM6XS2300345.
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