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 0x2728a6da95882f4583e5c93f660cf11c77ee0c17875255283e12a5147338fba8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d340a11e-b173-4f75-8516-c2a3f247f523.json and https://artists.proofprofile.net/proofs/artist/d340a11e-b173-4f75-8516-c2a3f247f523.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 0x2a38f539eaeaa6f6463ac9860a1200b083b058eed2415ce7dc93b91e47f19710. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/US2762303504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b84ed0ace2a899091d229b43f8e6024506ae7d7519957fd69bd03469a43dba3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:19Z), 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/US2762304342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a38f539eaeaa6f6463ac9860a1200b083b058eed2415ce7dc93b91e47f19710. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US2762303504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f873eb7964f14cb5db7bc26035ab3559a3cdf1801cd2dfd10e6953ec21c276. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/US2762304343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d928058c931a9deb11cf1de61e11f6b3a6f49fbded83f234e515e246ba76e4. 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/US2762304344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c3f47f32788d671bee08f790c8ef2c262b4de4053440a5f2ce4694926ad58b. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:47Z), 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/US2762304346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf59456eaab304a2a11eaa1e77cf193af1f4b9b3bf27a15cd1e7b5839cc8a32. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US2762304348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047a8e978b64d540f38fd7578c4d19ad0e46f3f665de1f1d264e335a5b3e66ff. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:41Z), 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/US2762304349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253486d8297d3dc5bcb69665235f6575c5df6a11cb7a667aabd3650f6629cc6b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:49Z), 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/US2762304350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67e88c966f2b1f77c899966eb794e1b101604d8375ef5be9fcf90c113c62839. 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/US2762304351.