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 0x23ba70b9fbdc1e338424412d67001e8883a3276a7de5c33048a86b756e2f1a0d. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efe3e2f3-0a85-44df-9ab1-892a24c8ec47.json and https://artists.proofprofile.net/proofs/artist/efe3e2f3-0a85-44df-9ab1-892a24c8ec47.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 0x071fb55e9fa1bec83202229187fc734b856ac12f7cb50ca32657b8c60f3467cc. 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/QZHN72021829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe519c8a18895713294769d33718e180656dd64690d3942d10ae980a62265afaa. 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/QZHN72021843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29084a5ec9ed78cace0ccd3ed1276ef4b8bd4405fbcfe09883164c5e31dd5e9b. 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/QZHN72021849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf486f8f4d8a64e18cf83be3cbe0e57f1a557323d93a2e3770393f6327e17de06. 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/QZZ662432781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c64925c3256a42da3cecbdd5945387c234e3506a8ebc70d8f9fa2079fd07a5. 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/QZZ662407165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867820566d19f276485f49f7f36fb400feb90afbeed55e5aeace2f1f954dc523. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZYFZ2361623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1c8bdeb03a8c2c158fbc39c3f5307fb821efd0aed2e5ba0ac2c0d7387f28cb. 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/QZES72175522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6925e7e661203e0c4a3c17b3f44803dc286e7dd787ac7b87a5228d4e2964e32. 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/QZNWW2087760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb4835436e84043a7b8823380ed991c10b682ed269d698c0be10cc4f0772f60. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6M2011451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24926640e48472f431d53aa327ce48b98de2df9baf72ac63351f97dc3e88914. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZK6N2076599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc556341f92c2cd98ff1708c3908a82af209f3d233ccb34526c97658ae33e6d2a. 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/QZHN72022520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148134ea02469a6e0cbd6006b79215220dc064a1beb8fc569b8e98fece81f6d. 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/QZZ662358508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baba0f43d0f2bd0ae39d4bab61efab18139661e88cd655567c2fb201a9a2b14. 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/QZN882419553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0d47cf210540441bf22be6d2463703d1a645937574680c3ff390c65d0c2dec. 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/QZWDW2426312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bf31cc6f9129c50b7b0497b0e4ed904aa0747c51f6cad837fa22c2df489ed7. 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/QZYFZ2424140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24abc9e8df8f88f2ef97ccbbfe65b98a133c93d85a1f427d3298c1cc4ebf980e. 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/QZYFZ2454346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e4639ccfcbd9d8e13bed24f7e7ba78549bdc7b89036975bd916c7b68bac0d1. 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/QZN882419548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e4f5a7268eb0d16495f84ac6cbb1302fae9fde6a8a4a5d7cd9b033a23a464. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZN882419547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9e87d39a968e33ff584771f8019f0cbb5207a15d0bb6c63c5ebd3e3ec9f24f. 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/QZN882533036.