Daniel Sommer (1850–1940) was an American religious leader who was a key figure in the Restoration Movement and in the separation of the Churches of Christ from the Christian Church. The roots of th
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 0xd8da1d9911f349ac0c13d5857d892c117d88edfa0d2dc1d590e85ef7a4aee48c. 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/64aaf80b-6363-4951-9fbf-4839e81e9859.json and https://artists.proofprofile.net/proofs/artist/64aaf80b-6363-4951-9fbf-4839e81e9859.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 0x81d3d713e8622ba62518bb3789244dfa36ee8ff746f8e1d61e0f0e078f061c58. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DEQS92201314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4729f7973e2db352e289ad35d4237bc10d4c8c7e5d1a4c40b66366fe42c50c10. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKY302401504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2113dccdc135a2b3b6bacd3b97cc10cd5e8734c7e560e8819c6607b0456c5265. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DKY302401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76203bc8c43bc576c599f22f68fa06a36bcc7a1b677f8565a92b8edf5986181a. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/DKY302401502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57dc1875e2d04fafce31c1f0c5e28957b466c1e423475d6469b76728c53b191. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DKY302401503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc3ff2040055d50f79da3b5cb79abe20dce27e29991e4960af4fd756b8b8981. 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/DKY302301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee1a5054477be61278485e96b5cda18d72158edc0c2b5ecf4d746622aa32607. 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/DKY302301402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc290af56965f0bdbf47392e95b83296dde753e2c68a8402c698f0a6a7cd2d8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKY302301403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e55d6871ae11e55fc9c2a8aec57bb18e0e9f47a8e8c4be7ca7c2ed568c8363. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DKY302301404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6100fe50a74d54ff55419ebddf8e8a95e01a58727eaba48f39b3b847233e9d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DKY302301405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9ae39160c41a4d6283b7ccb53250cfc7befd3ec94e6e4274056577f9ad2ec5. 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/DKY302301406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8ced6f9c38f893a3c85c584f2068e96727757a36cc854cebe56f8c9372b47e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DKY302301407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4377ee27ea9f05ce8ebf8ee973a880ace9e6eb1e6fef6ac59a9f2a6ef27d77e2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DKY302301408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17eac1461c00fe878a12490ef7e16ffdcf3e813dcc7a78d9087641175e575db9. 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/NOFOY1801010.