thumb|Typical 20th-century reaper, a tractor-drawn Fahr machine A reaper is a farm implement that reaps (cuts and often also gathers) crops at harvest when they are ripe. Usually the crop involved is
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 0x9b7246b93b3696fa71931b2f7e65673aefba574d3eef4ce332db5c7cd3e141dc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68cb006e-f84e-4910-8d4d-4e93b8d4255f.json and https://artists.proofprofile.net/proofs/artist/68cb006e-f84e-4910-8d4d-4e93b8d4255f.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 0x0e8471fc4aaa923aad292c9243de9607e1776bb8d9e1ff0b0a43a2a6a78213d4. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/DEL360700391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb907687705200e7efe9d17997d6d1b05d9fc8b7ed40bca55600c50e86eac0ad. 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/DEL360700392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf288fcce1f18cf4ad55e17cfa52b7a53134c226e8445324bf568adf1d7b25506. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/DEKV21612461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6121b40baedebcecdd407e7acf8151f5f4dcf673d0d865df99b919aa84a70d81. 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/DEZ900701637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aafaf84bb9937f60d1735eba4614d9a11eee6eaaa5398cff155e06c81f905c1. 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/DEKV20912154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241fd49e2f953e504cef7457367e48941e552bd4b337343507d7bdf9e42b5261. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEKV20910571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa05392aead0f74de29ad03f71030036aff5dc1481048531bc5e1320d5901960. 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/DEKV20910572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0596d48d6cd8ce629668c1dd246472474f601816a08f22ae0d14625ae5e4aa0d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEKV20910578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c271a9e30cfbc90a83c901f0362d4dfbe61f1816871c049e76d00aade3b2430. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEKV20910580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f81eddde69d366e750db41ca7396ce629fa01e80c8c4e7056d97a96d82b8ed. 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/DEKV20910570.
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 0x491def9f95c3ee3bf3b747b3c6779087e18f7cb7517de061214b0e6f9eafbd9d. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEKV20910573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688b9a63e0ad20e9cc284e630e86927760c2f387e946ea1b7d7cba78041a553f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEZ900701615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f7731d7114e2e09eee67966cf6c1130cfacfcd90529f1a121aaff25d7d7d52. 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/DEZ900701619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58274fe5dffbb02f7a0db6eedce371742f4c9b93224eb8140dd23d61bd59f3aa. 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/DEZC62333405.
Wir tanzen durch die Nächte (Dstrd Sgnl Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aaba86b978cf45c4408a757d4cc1efac57ea96a2832836f25bd45733550df5. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DEWG82300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81484a465c0cf9c6d8307898291d2b054cd16878607d14b4369d12df7f35124f. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DESE51600424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3452120be5ad7525cc8747edc7b64ea570ac3229163338063c90ed92978f0deb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEP510611303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81484a465c0cf9c6d8307898291d2b054cd16878607d14b4369d12df7f35124f. 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/DESE51600424.