Iago () is a fictional character in Shakespeare's Othello (c. 1601–1604). Iago is the play's main antagonist and Othello's standard-bearer. He is the husband of Emilia who is in turn the attendant of
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 0x13cd9b5b50762e0ab4b0eb07da0fba5ee04e4998075ce1b2e0417f81d1d20304. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fe4523a-2fad-4a2d-8a71-4b4696080cf2.json and https://artists.proofprofile.net/proofs/artist/4fe4523a-2fad-4a2d-8a71-4b4696080cf2.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 0xc79295167787799d4d39508aa03cc0f516ba349fac94dd40c54350f1a04ab373. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADN1897041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4354538c2cdc3cdd953458e4a4ea0b48d312435f927668bed045d414f35964c2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBDMT1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d9b9a25a695fee7990ef4dcf388ddfd332ae3a6bdc12707efb52ea32727325. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBDMT1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c485dd9a9adc65b8e91e2481e371ca915c89f78d870c841145632b1c3ac127. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBDMT1700493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc761d594dee7746e78bcf9e022365fc492df667ae94c4ef8429c578e96d7d2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:42Z), 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/GBDMT1700489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb8c57e78a855831968251dd73d264cdf668a5710c5739eaee4b88ad3b1fdf0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBDMT1300853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b0ad2ef0daa652a322e5ede7fe3cea1dbd6c008cf48bbf636c2ceddf1c3088. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBDMT1500255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd807395e5456aad8cb523ea94ede7193115da85169958bc663a0a98c16b7c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBDMT1500371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6f2ba42876ea06bf01fe0c44301f748a356e8f35701ad90418b7d9b65bf60c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBDMT1400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7538d131174e0b6f4421b927f8a025c68e101318c00cc3b3cca4b3338adb7b98. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLQ8D2000052.
Drop the Pressure - Purple Disco Machine Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797c2a187359892860e7d35812a12f46431dbe93e4c9bfb0ce71b0c199d5a642. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBENL2002693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9e324a058aeafe9e36f53fbcc60c56a12847bad1ab71d7fc56ba31c9822120. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DENC32200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbe17e719ded65060b04aa07d91674607c33ad45796fe4c3aaf1d9341c72059. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES84B1510511.
Let the Sun Shine - Purple Disco Machine Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8678532ed0e06dd65d0172d487e48c3a03d55fb2c7094a5b2ef8a70c38b6e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEM932000892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe926c078e3a70463fe8281ede25157fd09abfae98a30026dfff60bb6dc4ac11c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEM932000791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed52b397e8c45ef99c8bbe3906298d25fbb4bba4aef0f8885529ca6f7d62d040. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:41:18Z), 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/GBHAD1700119.