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 0x4664ff091a0787b1301a13904d3d02e18bedecbd407e769f04748f2ecd963235. 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/02236ba1-b255-48a3-ba4d-4ece92a1f9c6.json and https://artists.proofprofile.net/proofs/artist/02236ba1-b255-48a3-ba4d-4ece92a1f9c6.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 0xc96de722b0ad1c52892541165d31bbcf3e54192e48c7d63c64848695cf159019. 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/QZNWY2517955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a8cc0913b013d313d3323d47c80d814cbeef228d8f8914e29b7b19632b0c09. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWV2565988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eb95efef342653bfcc464fa970ab28b2ab962e30c8187a2394fcaf0807b40a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWV2565997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37e705ae8c49dc37cbdfdf898d60438cbde7507b4a019edfcd432c0108ca7d7. 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/QZNWV2566023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdfa27765eb2277c6c91da54271d08d315232e9a531fa9b2296e20c32adea13. 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/QZPLS2501751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293f3b760c4595b9d8b58755cfb12339c2eded79c25fceccced2d388c4dee0b1. 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/QZPLS2504028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97db8a4404c68ba2b2b718187d293851057e1df89d32f6600bcd3751e11a41bb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLS2504029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ad6ccec7d407bc2e3b644f13e7e3f5e9433cf34b152a9c881be9c33f0cc0ee. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNWY2520128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa795756d008780c2ee71dd64051b418a421d6e66c846a027041c5338bff7b2e7. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZPLS2504033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0d673140ecb5cb473c4328be5d31c95290490aa7bd70b74ae8ec0e6120e779. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWY2520140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e4238cd6a0d43bdd1a16b9347a07f11ee866a551230cb914ad62bad3d8943e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWY2528078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e24258dbb9d69dd116dc837ff776217379162473eeba707250a162fab2898e6. 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/QZNWY2528143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab71f51d26530137938e2d38c05b38ba97999a6072ab2a921ba4cdb668ffa9a7. 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/QZNWY2528145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53e7d6dc9f34f71dd919ad911415b663f9fe8849f6ddc0edf7c3eaa65aa34a3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWY2528155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0d439807850ffd8665e4537171081862909a6bc63e2e5b85dbe79b480a7bdc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWY2528227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4375f2c7fd16b2795e82e9dbbf4600361b1f5d5314d87e09af03d15b977a71d7. 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/QZTBB2562704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6e75d9ad9f8a15a5b255b9fefed8b8578539db74ed0f71aea01460e6970b0a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTBB2561693.