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 0x84cb40092a14c033f032ae647f4e63bbd5f6fca1d5b7d80fc6ce13bdb04d0a1d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/241de5c1-adc3-4e26-9b34-c063e5ef9345.json and https://artists.proofprofile.net/proofs/artist/241de5c1-adc3-4e26-9b34-c063e5ef9345.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 0xc9ce0cbbecab1c5f5f7c28ef8cbeb47ac2f6546aaa4f686fded6f369929386b1. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZK6L2009125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1842101b8a7f1318b369a9b1a8c85b9c7d0ca58325374321ec3e11c5146e93fb. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZK6G2070473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8857d88c8b1864de15221d3b72ee4036201cca910ccb34ebe206f5ff93e152. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ72371282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef80f7c88b7cc91549e7c8f35f8c4c3a04559d6c5ab9c1f7af5bd39c96c116bd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ72371283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe111c15a8eefa34ed9c47bbe381eca1a3c958de24c5f1abb9f92532adae0240c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFZ72371284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36152dd631b0ae71e103a4efaebccdee3ecd7b33ccb10ffed992c3b0c31913fd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFZ72371285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf116c484223bdcfbafa3385d24ca8bc1cbe170e76d9e168ec3ac32d860ef70d8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:37:24Z), 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/QZFZ72371286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37eca7a6ad6ded55e39baae66179480706013ea8fb31af4d5c2b437a3eb6716. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEP2395374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9c68c6bd83e273426841e1cf023ddff97df0f49772edca51228c46a0478eaf. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZWFG2338266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc917074ad5385e5989d30b6a43d0582573c2f2ff5bd07a3b2ad50eb14ff156eb. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFM2308005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c720eadf2c60b2c60d95a9ca67308d96a4ac42839d04fbac40cc0cf1777af9. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZPLS2488705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc917074ad5385e5989d30b6a43d0582573c2f2ff5bd07a3b2ad50eb14ff156eb. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZWFM2308005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e58e7ef92c95535e29e496121094aa74d5786f7adcca53062bc168a78e0e1b4. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZPLS2488706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf43d21f22a29c0f8076798eb6f8cbed0c207d03fb7307a1aef31c005403e5d0. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZPLS2488707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57be6186e49c645f6ee453b30af6e150d496147da09dae48a5d9cc6aa29a8ad2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZPLS2488708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01386943498a34a0d251c6f239943fcf87f932a1434c1d8e6f88b3bc75e94dc. 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/QT3EY2475597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164f632c4335cd1ab0ffa130ae7c34d757b864f050efc819bd53329155964024. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFV2493957.