David (; , "beloved one") was, originally, leader of the Tribe of Judah who became the first king of the united Kingdom of Israel according to the Hebrew Bible and Old Testament. David's reign may ha
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 0x928cf85ed2da109a834fc03dacf2fc71c2881d1cdf970ca77d59d3e6d4531db7. 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/b9aab6fa-fd05-45d1-97b6-859811058e20.json and https://artists.proofprofile.net/proofs/artist/b9aab6fa-fd05-45d1-97b6-859811058e20.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 0x691a1bec4bc28762d19054177fcb608dc74a245135040f127dcc2cb7e376abe5. 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/ES5630700459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76efcd7be6df622a74b7b529e08931daf35ae5eee2759f527599ee0084871971. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES5630700454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21059bed2dc85a7e7ee922426ab27610fab67c9035ecbaf8663ab7ca6a19950d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ES5630700451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ffa3dca2723a02e5ea2073d363492ae33e605e32c9dfd6453c542d5bd8cfd5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:05:37Z), 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/ES5630700461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e2b49b34f5ec5a5f0841d6381b240e4b84b207fbb5d4a8b454ba2026d8edd6. 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/ES5630700462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd29dca92f67ccf4c59b5e62ad0d2ba3c02c63b44af07a6dc404b011ceac52d. 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/ES5630700466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc93923932d178d9b91be4e60c3baa0b77247d6bc5aef2d6d215748daf5824. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ES5630700488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7e3ca0dbb3b8db20940246746e1360ce59cc7eee58d7dc7f530ddb2965d508. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ES5630700483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dedaa95542930009c6357e1fe2459533c429668044e29f02a7ab058f397b5d. 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/ES09B1000013.