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 0x28a5ad1500387911b31284f121e7de16b5c639d10c6eeb88adc32f8b3ff59372. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9111ae4-dd56-458d-8f4f-f65f4f5a9fdb.json and https://artists.proofprofile.net/proofs/artist/c9111ae4-dd56-458d-8f4f-f65f4f5a9fdb.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 0x7118294f3c448e8cd654c791f6fac4dd7fee958b3476f2d824ef4a73a87af6f9. 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/CNUM72000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203e59bd6c48d122cd6bdd257f3e6843bae60cccaa50888897e882be0b37c0f5. 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/CNUM72000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68933b22a1e9044fb7981743377f514cdc5d06ff66b0b6b43ea2e33c165faca. 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/CNUM72000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7118294f3c448e8cd654c791f6fac4dd7fee958b3476f2d824ef4a73a87af6f9. 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/CNUM72000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcac8b8274518be62f49b64dc4ff0da3648e400fd12dcb1c6f7d1729866cd9d. 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/CNUM72000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaa9e2599cf41d4c64ecde83746b437f395a29d48fe3486501f566986a123f8. 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/CNUM72000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed56da5c1e6f48d8ae5ec6026eb18e480229b41b33aaf46492183c08fc7ea14. 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/CNUM72000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b0061379bd332473af8ac7b4e2f3c457cc61e544b33e7910a68214b7469b98. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CNUM72000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ef752b4578a8a2446ccdd10e4eb7f47e55cca5b3e06fbdc629484abcc742a7. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:17:18Z), 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/CNUM72000077.