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 0x278fccf5e33cf36af100adf9c3324e43673ec6abd7c9f2110dcf596c8afeeb8b. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c855f298-23d2-4198-9077-d30502d7e427.json and https://artists.proofprofile.net/proofs/artist/c855f298-23d2-4198-9077-d30502d7e427.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 0x7467f8897f0155c730159861499e05594974b8e7d2571d516a8678cf1aa77565. 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/USA2P2450877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1333a49fd42d32a4bf894746bc89ea43bee9a1f88a36b42a67efe3c9c80ab1c8. 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/USA2P2353967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29156484497bbe9fe94159615e8f7927536e48de970ac26f177a6df0d8c7368. 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/QZHN52310579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ff0f5244d1c019f6319177adb6462a1bfaa090ca012aef79c1794f48c00bd8. 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/QZES62342925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c070c56ed5dad764a097736f7488f160bb1da6555f6e7b9b858bc3b9911fbc. 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/QZDA72541456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475ba548014316461fab065e04449eb35e2e7501a7dd367070f537689e0d845d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2468398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d72ebb92c5cfb0375fc17d3a45c966fa23210aac4d054d20dffeeed85902104. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2438698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eab88631fd9da41563adb16c4b4b2e08fed1779a1a32be156db44bb90fb10a. 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/QZK6L2443361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc6ebf27d23ed146fc886520a8116fcaded4437bed08544f52020422c496714. 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/QZHN92490811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ddd0192a7e87b2a70aeffffd3405ccfa96ed24c23b042fc5271e6c6fe1f464. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2325685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4346ea1a2e4d38a319e26bed7a2c0b776a34fad7e1b30d21e11460f1f0450502. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZES72321626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1453a268c1be70de9d2c6ddeab98cfca0c881f7369d1af5276be0cb619c15b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES62342926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7511a8727eb321ff099ea05d4915aceafe3e8e7c2b27053766c8f1f19ede98a1. 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/QZDA82365239.