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 0xef9b75b55d8392f63f277e7922548be3de7c947836138490eac2bc2d52f84b35. 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/251ba750-f22a-41fc-92f8-a86d089dfc76.json and https://artists.proofprofile.net/proofs/artist/251ba750-f22a-41fc-92f8-a86d089dfc76.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 0x1939ad1eee58c0eeb0217284cdf38fabab40212a7e14458304c4c7b3832e4b1e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHNC2135714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4886326d93f85422cbdcf960ad80901433c4f807800d7315879bdc8fd97970fb. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHNC2176319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80be4cc7557c486da6aee47c90e80ceb3d0c4c0cba7adcc278e02892ffd1f074. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNC2176321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065897be066b0bcb221d9f6f32a594fbd9f2b757f9c743cebf0fdcebf50ceae8. 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/QZHNC2176324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5a4303f32ae76f4da0a74f3ad21bfca4dc61b04ceb1747aed06c81113b2e8d. 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/QZNB82211621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe097d2b0e036fa0fa67539c3573ecdc6c457de3ac5c7b52556c7be0360143999. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNMU2363015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46245816957669a7105c9f411b821214133adc66266e152d6d83f50c77731db7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNMV2333766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cafbed891755bc0bec81c23f2c7335e3e63ac257c20e3fab1bd369d8232e7c. 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/QZNMV2375510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650e3e255e779f9a67f48c0de68fc30506822b25fbf6b3e5fe3b3f440780431e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:37Z), 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/QZL382490043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ce09ce0c3bfebff22025afc0898912b6b47f461945e3f8abefbee727cf552c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:36Z), 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/QZL382490045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d6ecbb9213abbca0e033d014807c1212b4f86fc1b30cf7c3848183a278c216. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZL382490046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1fc7ac1fbe3f92af21df0f9b77003350f09bcb342e97abfc4e08ea1d19ec62. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:25:49Z), 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/QZL382490047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee5b5b526a630d176b2cedb87554fd8dbedf6786923955b5a7e62b440b40d3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZL382490049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ced2e0e05c3adea05c0844d3c8b8664f2943c9c2c6dc2605cf1147142630b0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZL382490051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e0bd91eced5b369027e73fcca5d2c08e8e89d6d108175a1334b029b70f9bbf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZL382490052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844cb11a3d195fa81243b7441ea6a2090503d409853977790e4e7f0488c99241. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZL382490054.