thumb|James Montgomery Flagg's famous "Uncle Sam" propaganda poster, made during World War I Propaganda is communication that is primarily used to influence or persuade an audience to further an agend
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 0x6bc68840d99f5ca3bd68ca8bd200ff8d3b4b0d42e8fc2699ffe7de9b1465c752. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f28cd30-5fbf-409f-b98e-8be12de90048.json and https://artists.proofprofile.net/proofs/artist/1f28cd30-5fbf-409f-b98e-8be12de90048.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 0x80955a0f4c51c6566b48554114982844eca4360664238ff78c6e53876271924c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA52276765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13aba62ba2fa46251c2110ace2f9412f4cd6b991a0bf631325afa2e502ff2e3. 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/USUYG1275349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b3b3cf577fae4feb6d95d289394b9240f06dc44d88e4887ed6200d432a3f0c. 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/USUYG1275352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe613512fbf184498d17a3e586b7e472ac090ef6c7eff145cd8237cd6081f43e4. 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/USUYG1275346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eca2089eba9dee054fe0f50a11c4a835c8312b85b78445f862ca25fe6cec5c3. 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/USUYG1207571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc420e94fbcbadd462b99bcea47a2f37c04f770862c190054d8f4fedda519ea. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USUYG1275347.
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 0xf97dd1a02cf3333db2eb8944ef41983ce9fc9ee3091556afc4e24209a92e7aa3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USUYG1275348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d04454d57594f8c1a9791cc7361789f324ce49c44f1ab539bdc253d1bd89308. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USUYG1275353.
Nothing to Something (feat. Propaganda & Aaron Cole)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e51884601424d79b97a54ae5f2cf52b81c3f01b4a4eff79511e00afc3cf6cb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1206872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fab9e37dbcf48a92595c3bfdadf50a78aa17d1dc910ce320af593ab644c80ad. 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/USUYG1442785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ae75ba4aca8a5b770355ef26e4eb1ed0044d2e33d55f59f4e160b4d2cc49c5. 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/QM4941600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bd8b5ebe81eb497b5693b07a2eb4d5e1e6659b5e75375d726ec1c2e2ccf46d. 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/USUYG1062959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2527f9b5657a35d90e4f78e0cbfc0c6de1db26dfe49e96eba516bd4231d5edf1. 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/TCADI1799798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17001c9ba2e7bc360f5edbead31a1b79ce611ec787fc3f038d901ca16cdf962. 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/QZWFF2436312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb607e12a38cfbca727a2e87c57112ea9ef0aab190c59b4c927e9f711f8d92c. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZHN82088862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbad7f429291515e3e84b83a1619600f3bad4ade56f122a4c29fc85c9f9972a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHKR0924213.