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 0x8cff956fde8a67e79f6122d711c5d44f28b052b92a9cad95db224630ae4a3b13. 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/bb8051a2-e99f-43dd-9b22-d8bcfc82fff3.json and https://artists.proofprofile.net/proofs/artist/bb8051a2-e99f-43dd-9b22-d8bcfc82fff3.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 0xc3a1ac75e33ce5ff41b1fb44c2db25b333732c2c3513869a2dd49333ee6bbb64. 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/USA561157146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231463692989b9bd133200d1b87f82d4ec6b8a7755829e3d6ebf06ae7b06fbbf. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USA561157142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2d7dcf68bcf87d1404679add92085bea244472a4877e0596fde963d84a278. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:20:13Z), 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/USA371595171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0704a296cd3e4ce6b52706b90b1e80d246f478e8c48c9257370d7a192ba46c3f. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:58:02Z), 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/FR6V82217827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd600f45be9df2f0f5ff797e508cd300f509c7c1df844360233baf1976381b359. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/RUA1D1602228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c0e8629d49b2847a9991610894719d307fdd4394596dbfc1420b5bc3685311. 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/RUB731405369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb94072e43ab44ee84df6cd9a6f13d29035422cb607777f1e654b1970cc5ef5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUB731405371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a49655c169925059e1c6d3a40d17bc93de97ba7dcd1cf9b839b20d8cafdc7c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUB731504967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c36d9da1f0818d39fb51776f4fde9670825cf91929f72266fe43df2578585. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUB731518115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1557e29140a8db9640ffc71867ae4d9e1947aedbdc3c6871cd5572af762eb8b7. 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/RUB731519354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025b9bc2ebe6518f83de62c8b55a2f99c5a83f2482318c234e945f9b8309196e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:00:34Z), 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/RUB731585461.
Белое платье (DJ Zhuk & Invisible DJs Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ee84230b4f9f45ce4c432a38eee00aa40ef36583ab162b56141c4364403860. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUB732003064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26b9a2c22d099d2d53ccf8cfa71376d0ee8a611429257c5b941d7d46f7206fc. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:50Z), 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/RUB732046022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e84ad8d83f9152b3c9f6fe87bd081230531a4bb2464bb4bb323d9a0bb3f45. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:23:29Z), 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/RUB732082576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7cb06de4498f0b6947ce7e42a2a22ac1a920701d0a390fd8910d4019ffa673. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUB732086654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cca1751c8e8310fbb266895617e65c4ad986f3035c07317404e6130c2d9c1f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUB732086656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b07026899c6dbebc6e9c054083ccec423a23db554e048416c458d1ab5aa1a4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RUB732099112.