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 0x8f444f4f2154a155fe9a83d25c80d587fd890d63663edc3bb686417b387015b1. 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/38aae435-b7d1-4459-be72-9f3ce03bf1e7.json and https://artists.proofprofile.net/proofs/artist/38aae435-b7d1-4459-be72-9f3ce03bf1e7.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 0x4fe2c5eb78380372fc09b3143bbe7e9ea68664adda78598ffde894d79201c7ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA71983328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d740f47f08f256166d4f50a4b6afdf2510e2cc6250479bb8f0f205505ff135. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZHNA2103670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaf05262db6d70f536cee170df127fcb10b5307c56ffe5d380ef54f603388ee. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US38Y2311086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd3a034bf3a498054ff307338479087263432ce81859c93ca8925a6bf2ceedf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US38Y2413679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c42f31f15ab25bd60241f0e101d99d56cd8471c1de247625cab3254bbb00a71. 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/US38Y2431968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbe6b342eb5e896f878314656bebeeec5df2fc8dee6953ae8ef2c94accfb9db. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US38Y2550612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc565911d9f2916edb7f20544489aff509ae9573d4aa9a93542148aab683603. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US38Y2403783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45708a97db222cbd06a52e813eb4930df3a91f8dbe0850955cc24d9c63fc0b7f. 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/US38Y2550615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec1810cc11fef7bc52929bcf83907f73714895806328e9a1dbfc87bab872602. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US38Y2540851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbc1416e51409f8f77da8030fb7a1e87dd22c037dd91c09f6857c03a0a42195. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/US38Y2409334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42d26facabd3c1eca75fb0d55ad27dc7a8b43f8ec4582d04fa58ecc32e524e3. 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/US38Y2550618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ebff90955e70b59450f379b7925eab927893b5dad96eb400a28fb413f0188. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US38Y2550619.
Blah Blah Blah (with Capo Plaza, Peppe Soks & Christian Revo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6cb88a27893db1ad99a615bffddbdb9dfef4e5753e9e80ce33fa70ff9ce4f0. 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/ITF251700180.