Circus Contraption (founded in 1998) was the name of a one-ring circus, vaudeville and dark cabaret troupe based in Seattle, Washington. The troupe, which employs about a dozen performers, uses live,
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 0xf51997625a4f3122139e15d0366abcc39d306a7e8767c156b183188c2ca94e46. 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/a0d647ff-cb4c-415b-99fd-6c03d8772b3f.json and https://artists.proofprofile.net/proofs/artist/a0d647ff-cb4c-415b-99fd-6c03d8772b3f.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 0x7fcefa2ce7da8308c1666b80c8b865f8620a043806982d3863a6c43bef1b80d2. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:07:57Z), 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/USCGH0634643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834f2a2d89a4e47aa0cd8baa6ebcd6501ac158083af6aface7776315b0630564. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:49:08Z), 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/USCGH0634644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed9441bc7fb28e0af1229ce01c3883248a59ddc69616c322241bebff655bd78. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH0634645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25289ff83ff7d64b997337627c0096ccc9da30ee644ef9eacf3479cf37a241f9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGH0634649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf4653b2eaa1ebef8437ba82301096fa6e24f90e909fd83f0521034835073e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH0634655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8d47c208ffebaf5cdc29a7f6cd48c5582afac8389bd42afd030fd91d60e274. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USCGH0635070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d253e94563a575ccd96d4277d25c1c9868979d6226ad2c15c75a1cfca01975. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:44Z), 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/USCGH0635072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51858c3c8642002db4a29057f53d3ca0d2fb1112ac8da8c368da7c0c03ea674. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGH0635088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb7423ac4a45e17e2f58e5d2e25ac0e94563b009d7c13433ad6d99744d0b6cf. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:50:16Z), 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/USCGH0635091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a5f1d49d498ebe620327b1a5c34274f4ee0ec8df9ca815935b6833e36ef935. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USCGH0635100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3733b4a96f9b586c5421cac80c1f43e0129d77f2f06f645ab1b77ea99503bab2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USN891000008.