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 0x6b0c9479792c35fd6ad41b4950ba4363680f15cf2662db5ed1ba20ee6c26c108. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f09b9be-9429-49b8-a9e4-4a5825a14185.json and https://artists.proofprofile.net/proofs/artist/3f09b9be-9429-49b8-a9e4-4a5825a14185.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 0xdd896dda1dc215216372a4096101e600f1b957fbac0970fcfb6bc96a04858de2. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6K2318316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936fb3ad9449d89d8ced9eb161e53db95d037363c3ca9a53cf05620879c38041. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/HUA612400999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f6dfa4922f7eb932555be945e91ef73902cbf4add203d2d91cc04467af94df. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/HUA612404660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3f5252b87ddfd6a161fa8196e8fa88acd86d1a648042ff8b73b4e0ccee10bd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HUA612404662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86bcbe371cd4e348d19d81d1361366baf367ce9aff8026b50554087b79313da. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/HUA612404663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf553b40bf7f4d7fabc7ea8c499689debb914d20fb2e556c3a9c619fbfbeec367. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:43:47Z), 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/HUA612404664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5717beb087b9242fb527e67852ac6cc790e6d43b663d61464fb8decfa15721f6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/HUA612404666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc42753ae5546465d216a5fc6acde0941b8f07487a093a1317c1e4615bed0254. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/HUA612404178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fa6bf74d29fc9c313d41f3344522cd963934205426d300dbcca0deede394c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUA612404667.