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 0x931bc7bcaa0aed415ce19cbfb43e35929f4d39526e9f9ff8f2ca4061fd22bac1. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e5c9e3c-1954-478a-a7a4-828127130023.json and https://artists.proofprofile.net/proofs/artist/4e5c9e3c-1954-478a-a7a4-828127130023.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 0xfbc8f25ae68e8ae75ade9a965878a9fcf6c4da121fbc4b74ef44d6998bae3a4d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PLH492153004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b68c1a4742b5d9ca0e7093e4dd9aa826cf9b004c56dcd702b7ae738d758e5e9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PLF242209258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f6ff8ed66de2a06fd3503ed00cb5c3589d569f760533fc2174957bcc0059e0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:04:15Z), 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/PLH492157870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dddd3e8eb4a1ccdf953fc5380efa00fbda02e67b6bbb44498ef13f2f284b3a. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/PLF242413675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0991fe2b9fa71c94d7bb8c8cf235d7e53ec1408e57579a61a861a1380845f8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLF242414039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dbe824538e85b344be88bb690ee17008284cbc1c5c217bf91dc0f99b92d053. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLF242514276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36cbd9ce466c146929dc31a9b620df0ca5cc0bba6532d6ce2ff361e09bf781c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PLF242514315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096bfabe813f8269b8b79018f8ca6fe6bc962a3130f2dd2b7335d32b0b9becb5. 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/PLF242210947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0991fe2b9fa71c94d7bb8c8cf235d7e53ec1408e57579a61a861a1380845f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLF242414039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dbe824538e85b344be88bb690ee17008284cbc1c5c217bf91dc0f99b92d053. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLF242514276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae80fa7a0aff428c2a990c7e6419b53ce4be3939a79df3795fbbb70616d71b9. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:55Z), 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/PLF242413419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5790e7251de1cb35bafddebe5a052196f3d60675157755c39adeea25ec659d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLF242514317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2924908842b74b10ebd8f2952d450967e57799f7c80e6d9ef4fef75dc81bcf01. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLF242514320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51077ec42bc87e465e3e0f15a2f02aa523060ceab806e368d1fe1b4982c0845. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/PLF242414226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dddd3e8eb4a1ccdf953fc5380efa00fbda02e67b6bbb44498ef13f2f284b3a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLF242413675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a5bdd0ed5bca2aa162b125750abae1e1a3a7a6378c74ee78c5cfbde3395997. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:05Z), 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/PLF242514323.