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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09ded6d122863ebe45d283c44aede84ea0360a80e144ba62460809921a9a482. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdc165e3-232a-4ed8-8829-a068e414d493.json and https://artists.proofprofile.net/proofs/artist/bdc165e3-232a-4ed8-8829-a068e414d493.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31905e167b7101d39726042aa4f5fe420e0ff266ba8420f20c2b347037f4dc. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USHM21307099.
Pas De Basques & High Cuts (Steps 1 Tempo 110)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d7f000a04d7762592427aa48d5e093782f641e6a22f1ec0544282a6af7d8ee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM21307100.
Highland Fling (Slow) [Steps 4 Tempo 112]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b36e547ed8e720fbc798747d736379f83a14ece533987de3c8e4cccbcd1ce8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM21307101.
Highland Fling (Medium) [Steps 4 Tempo 118]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d4d02a466b072683c379e815c19fbb2790fc5e445fb96630ecc891d61154a3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM21307102.
Sword Dance (Slow) [Steps 2+1 Tempo 104+120]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9594bc916eba52885cf7d9fd9ab3564e011b656ef7ba32d1c64015c717ac7ed2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM21307107.
Sword Dance (Medium) [Steps 2+1 Tempo 110+132]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8550ee9fd400555249d2430e54b59adf5b8918df308a67525ce3b57f15b40043. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USHM21307108.
Sword Dance (Fast) [Steps 2+1 Tempo 116+144]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0a351cfeaba1122a29e804dcb2052bd6469c20cbde3b42f5e4f19c8dba84a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM21307109.
Seann Truibhas (Slow) [Steps 3+1 Tempo 92+112]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42b64389b76038155cec01b2dc5d587eecb656c9315a332cf2332940bfe2475. 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/USHM21307134.