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 0xae7b00db384584c64ebb4d82c76191fc9b3fcf7d83cbfe48318a114b13728637. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec646485-bda5-4fb5-b84a-98bffecd7968.json and https://artists.proofprofile.net/proofs/artist/ec646485-bda5-4fb5-b84a-98bffecd7968.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 0xa34392ad95a39ab1576303f6e57ac220a7a5876046c555877b2a7480a6b30616. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DECY52301889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e797aef2fc0a1756dfae6d8b7406f8db20709bf57a54e2fb7b01e233d29d82. 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/DECY52301890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aef55cc4f285769176a37e4fa6982aac490db0cedc3c05a5a0a092158d40b13. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DECY52301891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ba8515f675ad40356b41e268d0ef75a792c42e7af9287bdbc46a5f435af98e. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DECY52301892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253d9352ee54084c3b9fb5d6ea207dda11fa35795d81208b218889703c09d114. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DECY52301893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd70beb4ccb7eef9738c753ba30ba5b884b365998405a75a6e03f841bbf9a406. 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/DECY52301894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3199991f763b756283fa85275ffc9988228d66acfbb6c89cc10976a2dd3f2a. 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/DECY52301895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782e1894751adbc5e0c0b1eb46de1cec1dbf4ee840fcf4fb34563b7838f57946. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DETB31608052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab727937eb80ac893b537ce352551c17519ef5b95d37e45e02b4b6536653205. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DETB31508032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5643191c581c3332384414cfdeee06ccef031959fe1b3b2f7381662ae5ac34f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DETB31508034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68db0a1369ece9a6f806b494a79db569c2f2f6bfda3427c42a0c35111df978. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/DEPL91800892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282bec743d71b2595018e0af535cc59207ed1ed15a4252c8f774248ed0b44de. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DETB31708102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64deded1969c526e24f3f8365a29d1997e076cec810fbc3abb738ccad4c0e5f7. 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/DETB31708106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b6df60e52cb674a50b497e0a3633d61737d9429fcb36de65a6ce270b19c165. 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/DETB31708107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be352db7f0a950782555995b39ee020247d469d9439f888c6622e225080cb1b. 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/DECY52000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791a3eeea1e9bc32620fbfbb97f1e215f2930d6b21201925eb0a337caffb2509. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DETB31508021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f29df402e4c6e20151bb0eb5aea9435669aed4dc97e3db00f6411184163b037. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NON5K2138010.