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 0x316920f5c96bab8f00161e474aa669072c9af703bde05785b22745dcf38e8e5e. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/320703e9-aa9d-45cb-9a62-0db57d0adadc.json and https://artists.proofprofile.net/proofs/artist/320703e9-aa9d-45cb-9a62-0db57d0adadc.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 0x3b39e66eb9fe56ba8585f73157e68af0625969c25a74b280facffb3e283300ba. 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/RUA1H2126159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff55795f916b5e23be42aee998465e24883da4ac4466d91c53b28f5afac279ba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:02Z), 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/RUA1H2126160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f51b85c4e3dd63ac05576ceb72e1dd93c71acc982c3adbd9821f652744f5186. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/RUA1D2173514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4567906905a541e38db90adb5747a5f1fdea55ffb9d91da0881076d64fadcd34. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/RUA1D2331335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107393e5929ba898af169d5053ddb7d21f46a62f13ab7abc195dcbe7210894cc. 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/RUA1D2463573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908c75725ed69b94701a92c5de0de523300bf23ffd4c435a6fbc54eb8bb5b797. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/RUA1D2512565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d53b8e16a5d327a5c2021be0f46eebd5a3e5c30cecbef990cbede30e061f97. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:24:33Z), 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/RUA1D2547508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb7e6a8a9f7fbfa3fb0c7a7f3b4f737a2236c7b1827365add4623f9176a0756. 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/RUA1D2566049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf187094b551f119787c4a11600c7354433b25bc50a03e5d23298f6760e6b4914. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/RUA1D2566052.