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 0x20d9cfffb82c2f4947160961e128f9bd9f9a7aa5dc35fd7abf7aacab762ad687. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c6d989d-3f21-4623-9007-66c6cd905131.json and https://artists.proofprofile.net/proofs/artist/0c6d989d-3f21-4623-9007-66c6cd905131.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 0x27b9de114b459f1c0c387be22cb3c0f86417c3cfa301eee09dc20f9cc26678a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYW2013612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba8d733aac0b582bdf1fb76191bfc57cf3dbed464b6db456b706e2529b2bcaa. 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/GBWUL2043967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa909df1583e4f5f3ecb6f1a8cd74d6b7b727b94aa3a61d9df45065b95117b78c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ARHXW2302909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6ab1c265a9ee5f82b46018be0029d38ba31647a89b9dd64b6caf0a16adfad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARHXW2303081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce7a6f5b11f98ea6c79a47b44a32dff419fd8326176582d3617b1450d771bc5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARHXW2303358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c47b1d160695eed935c5e32df1d0494af55006a3a9a685b4af09d7815d1963. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARHXW2400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa009a69c2874c80c1a581494c8169bcfd52e8549b23800a47a8d05deab78084d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARHXW2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa310eb1ad6dfccb0ea723fc808dfdc3df13fd2d66844f3a4c40664a052c27bca. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARHXW2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d3e7472e02b0561484d385989cadc13fcecb3320cafc7926bb713ddfd209c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARHXW2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e9ed580ef1d9dda4d37b6d6d24d909dbb4e7148741a14ecc47c1baaa5aa16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARHXW2401151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716556c1ec49390ab832a44579f760828c55693a9b30f3a407b0dfa868484259. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2131616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61de0899e4b5d934678f9ec458fceba579fd504c86e43d947a07229ffa4c2b5b. 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/QZ5AB2406507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61de0899e4b5d934678f9ec458fceba579fd504c86e43d947a07229ffa4c2b5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2406507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9859f729cb01f0d8965c049a874eda728344b8fdce98ae67b31fff650b69f0f. 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/QZ5AB2427997.