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 0x82dc9803975157a75ee417ba458d3d65652e09df4e9496cbbb744f4cec90450e. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f2fe3a2-606d-4a50-8976-89ba90e560e1.json and https://artists.proofprofile.net/proofs/artist/0f2fe3a2-606d-4a50-8976-89ba90e560e1.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 0x857580188ae90a07dc2154ab2db2580fc032ae75d5d559bcce48a87dd72dfc87. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZ7V2432815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba62484f6a707c6ece171e9c226347c0ad9a34a68aa0cac55579ce1a54d61e3. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZZ7V2432817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209c61198c84d2853deb897af88842e79e7b0560e46a32214464181a2f1bc4ec. 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/QZZ7V2432818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f7ade044d4b48c25c8e02c9da5dc452e2f2f63c1c859d12e636f434f86bb1c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7V2432819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fcba7adcfc9b390c7169c98900e6516cb1f9ac7d3468400decb8c019d14762. 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/QZZ7V2432822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a67481434d16d71c651dc2423a9f8197605457a886cac3cfaac467f6feb4a48. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7V2432823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046860a237fa4c9a4fd670b2b078539b6fef3f3326f7d48f095c917c727f4239. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7V2432824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7393dbd5a55798a0c73f6989155752eae5a624e7d7a6f14746b52b6b6989df. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:44:25Z), 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/QZZ7V2432825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab9489442689a2a0c216f90bf3040e393581638152f15845b6d9a24dda0e73f. 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/QZZ7W2448021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5516a8e22d9e07ebdd2addfc201395aee39bc705310026dff07196d61d05b8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:13Z), 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/QZZ7W2448022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea77ec741b9e875ac4447211372b729da624b19d0deb05586a78c6e39b12af94. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA72519424.