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 0x836f98711e474ec74c959f087a17201da0b040247bc0a853a311de238372838c. 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/a0d434ae-2bb6-4c30-9db0-104561ab375c.json and https://artists.proofprofile.net/proofs/artist/a0d434ae-2bb6-4c30-9db0-104561ab375c.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 0x87c1db0c0d8fcf66fc7a8ecf103600afea714e2573d019733697cd82657b64fd. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM4TW1613417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2432845caaaee47e697c979e16a504f9e188b4d3c66e758bcd092dd9306ce6df. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:21:00Z), 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/ES71G2022617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf507c09d003bb2e422d2a44f6d5e22c3e00f83e50b2a1e9b01807f5e95fb185. 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/ES71G2022619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2635389deaec647317db8c3f43cf7ff847aac79d7f3cbbd26fb74942265452. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/ES71G2022620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adb1e98c72ca21cd828dd9431ed8b1a14469e72d8c5bbf431e7982e870a205d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:27:17Z), 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/ES71G2022622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5057bf570c76bfb83bd4e9e3c81e29db31d92f0ad4425a957a05bdac41922a6. 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/ES71G2208085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cbfc971687685643d113f7e02d063a13d80603c73e5826b2d4c1eaf16b0481. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BK4DA2302111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feaaa2c8ed7df84a4526dccb8b934710a6980f020e2a517c582f1f4a7b82d67. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:59Z), 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/BK4DA2307721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0f76e1228a8e75aaa796b4550e2de36c66f39b53e5a2fe0e3081e99834a5c3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:49:29Z), 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/BK4DA2323362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ad87791bc848d2dd1e98b644348639c9e50577fa55b48d4442bdbce208e78d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BK4DA2523839.
Bnet vs. Errecé - Cuartos de Final - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb863cc2f946071594291cc48f114a3fe20bb39fc526fd0f5e0e756da733178fd. 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/ATRG71884010.
Errecé vs. Blon - Octavos de Final - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b12740d106c6077a087d4490e1849ffbd91dc43a506e5df427d3cb220bfc80. 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/ATRG71884004.