A circuit preacher is a Christian minister who, in response to a shortage of ministers, officiates at multiple churches in an area, thus covering a "circuit". Circuit preaching became common during a
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 0x1986feb9ee5a848a881c94529a615ac01d4c7734b38da163ef8030b7d38b9fd7. 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/dfbc71b0-8b38-4b27-aa12-6e5a80b95d10.json and https://artists.proofprofile.net/proofs/artist/dfbc71b0-8b38-4b27-aa12-6e5a80b95d10.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 0x86f3b374fac500dd3e71eb40a42d3d122defa47a66244237ac0be57fe6e98bf5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEWG82300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b27bfdf42d60415a6d12dbfac802c4db0ee5e9e14c9865f2d7dca2e72cff261. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEWG82300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd13aff904594ce2b100174787dd0cad09650a1aeb149d4002d65bf358b15fe4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEWG82300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e99ae934ee6c9dad528051df133ed5fb7f987d9cdf31f9968daf40f98d9568. 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/DEWG82400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b0370855dc3a9d34df313664e6aefff79d7e8de2cc74faf35b4378f27c84cf. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEWG82400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43fcfe9e76f7ab70e164e111c0df9301f3d411d57ed6679f79e5b4c1f3228b4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEWG82400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf86b10e5307eadd424cac446eb654ae0a7d9efbb5e9d9f9463af2be29601ece. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEWG82400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee0b5b30288798d5fad44735c48779a3c1c37fd35be2d19d1c48c50c0ed0b54. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEWG82400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b043d22aa0759c5f869faef0ab67c877699dbff05119835233d8079eb73d03. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEWG82400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd06dbddd7e9a2a628e73b019ce2c451e79ab0f13836fd885b9a0940e3fd5bb. 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/DEWG82400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb1a7842e96cea88b5f74415188d9aa89e72859cbcf5018226ed1475d05c611. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEWG82400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613a8d266488ed687de8bffb89f2682b5953b09759e4bdf48cd761a1d51ff777. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEWG82400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aae78a7a499a9b6cff33b68a34e1b69d3bc61500341e96f785b58c7ce596b1. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DEWG82500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bda13b82154d400db2d417ca83c690588e44af7c9b363059cc6f48d4fbad461. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEWG82500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aae78a7a499a9b6cff33b68a34e1b69d3bc61500341e96f785b58c7ce596b1. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/DEWG82500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613a8d266488ed687de8bffb89f2682b5953b09759e4bdf48cd761a1d51ff777. 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/DEWG82400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1969888d37e6ddb30679819a6cbc763d7aba843301f945c18aa9596988d66c60. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DEWG82500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aae78a7a499a9b6cff33b68a34e1b69d3bc61500341e96f785b58c7ce596b1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEWG82500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52690161843ff7eadddc6c2d06ef180590411c3a04bb350e5f97ba4b10d36de2. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/DEWG82400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb1a7842e96cea88b5f74415188d9aa89e72859cbcf5018226ed1475d05c611. 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/DEWG82400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bda13b82154d400db2d417ca83c690588e44af7c9b363059cc6f48d4fbad461. 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/DEWG82500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b1819018a35855b503d5b76deea685582269f6063144533c8fd31643c0549. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEWG82500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319f19730c70dc255119574298ede413c59c61330ec01072f55845c81a85ff7c. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DEWG82500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a61e6188d901a552b7d6070ee6ced1d65450d070a38f8d5637cb5e6a350aba5. 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/DEWG82400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3418e6fd4d57bbb2803ee06191f4b785f06154028259a70d85a2a6ea26525314. 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/DEWG82400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e9dd98c773cca40b75e1ad03eeba03118b815e5477e24289e2ee4c2336218c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEWG82400206.