thumb|Othello and Desdemona in Venice by Théodore Chassériau, 1850 The Tragedy of Othello, the Moor of Venice, often shortened to Othello, is a tragedy written by William Shakespeare around 1603. Set
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 0x958bcfef280b2f9a053896bf4474588b40dc41ab310a0a97f88f550e9e474550. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ff48290-9482-479f-a9b5-19d6a435e048.json and https://artists.proofprofile.net/proofs/artist/1ff48290-9482-479f-a9b5-19d6a435e048.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heart (feat. Destro of Boom Bap Project)
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 0x8c8a2503c069995061f3ffa0a9875d14e561b92cc577c70843e9d17159510bab. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USACX0510100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137af36df126525c51a60b201eaa2994ba9a9d999ca0c409ffb178a9df3afda5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USACX0510104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcbb7d2e98f735b1ffd0f62da29d889c268cfdf676f101cf9e9bc3ea53dbd7b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USACX0510105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe18184be618c017ae6d01979ab19458a1231ca436a81dec51cf8158f6e864a5. 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/USACX0510110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e92f711af8493acece55214c28df1a2e8ea7e3dc0927de1138b465b3e387da. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USACX0510111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6516e05fa6320632139376fe74df1cf857556db8a4a5c07c430db4034115e49c. 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/JPD731500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef894bc723d049fbefd43d65d61cb917d207a4527a8cc562fb418cc252747687. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/JPD731101378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aa7ccb644fcd2c3c77bd14c1a5c42d90f821e832d99eb3e46a6062ac28c043. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUR40517421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473df20a85614fb0f30b539f29ae200227b4a8aa2abfb58dc0c80924898f9f7f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPD730800136.
The World Outside in (feat. Othello) - Raujika Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57adc97d41bdf48177ea6adc1ec8dc70ab1b623f8a786183fb731ff4bfa9f0d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPD731000347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c9db3570b64e067503deaec94f5cc44fe27d1ad7a89a49891691019189fa5. 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/JPD731400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8885b803556436180f278a22a15548b36095e9c93bdaa4e550ab409ff0f70cf5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM20511386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027af2f5cea3cbbc05aa578d12e4d1866a80087991b42a8810eea83759e03e45. 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/USHM20511397.