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 0xd34a35454a420e90de5a2f4555977c5f94ca7f732623466bdf388816faef7332. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3c5250f-9287-4061-9b82-511a0d208891.json and https://artists.proofprofile.net/proofs/artist/a3c5250f-9287-4061-9b82-511a0d208891.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 0x818f4f862e0dc2f2ce86218962400124850be1dd2711149fd46443b6e9313f54. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZVEM1824209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7db29b6b6a6c446112d966775c6be1029e520c4779713662bda9484092398a7. 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/QZVEM1824210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572a42bc18993f458281807e36ec9b2c1a2478b91c0e5aa3ad223273c5c16db5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZVEM1824211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704dc8e22158614e4b5f6dd9bec159dd358769ac73d40445a1bebcfdcd3c034b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZVEM1824212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261fc3c0e6d34bd842cd2b12e78cc48e703153593b0136dd53eeb617d83ac40. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZVEM1824213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb383432477536684a47eae621e7826fb52b98ca65a817ea8e996da78e77ed3b5. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZVEM1824214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ca771cbf544fd4d909a39f2ae987de7f9fb95db7fe07faf1ab806ce7514e22. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZVEM1824215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d50adcfb84d6482382cd6ccbb59b9794a0019bd5e7af2f16ee29e6037b5f275. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:40:13Z), 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/QZVEM1824216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b6e5b6bfcf25aef7bfce3f878f550a3f60466c86777235a7e33c34fc7bc63f. 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/QZVEM1824217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957dcff9f20b04982bd8c44f46058dc90c271cc69b3dd59ca7740063cc4244f9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZVEM1824218.