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 0x762345e96e6473c0ea4ebbd136cffda1e8ab3b19dbeef9ad715aecdcb705cd5e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e53b859e-24f4-4b80-95e5-00c9a211c38b.json and https://artists.proofprofile.net/proofs/artist/e53b859e-24f4-4b80-95e5-00c9a211c38b.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 0xdc752cbc6f8dd95da1087140f0db7c0cf3a99e2119e9955433694b1c0efb0f05. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZFZ22358300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda80c4b99efa4b53ceacdb542ff9ec195cd883828a47c7dabd73183985e4d43d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ22359147.
Watching The Sun Fall On A Rainy Afternoon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea98db64f578accd05b7c4895d25bbb806a4c1aee7f42651807efab8682e619. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB92341309.
Starman Theme (Lo-Fi music from Super Mario Bros.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aa914ef18f4fb3ac6da8b555bb22d0368db327b30f53008058824535aef114. 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/QZWFF2324732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8e9dd3b52bf744d24643b361d445284c128d14561c4d0bf9eb98a5edf45eef. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/US3DF2405702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd5ddc972fb9eb02f539bcbabfaf3f3cfce9c0cf4930582128482b9d66d19f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2405705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5607fc542608d9e26b7e8d53ab4289cc8c6843bf68e1081f367aad7e0957b0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZK6H2462165.
Missing in Time (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a72ff4f0861a883553e2d60c773f117df618c8f2b29e6bf8328285aca736925. 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/QZZ7Q2494863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f3ad28bb038e9bbb7a55b8f89c36b3c508d4cd8d95fcce27f63b2b637d4ee9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ7T2435895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7121fa7247368a8a9d36dd706db6c0913d775dbd98ccaba1fc255e8ef07484c4. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTB92504796.
Cycling - Lo-Fi music from Pokémon Red & Blue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ed85db76cc413672f0113c3de7f49b16e7862c0cd57c1710e41a1896af7a30. 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/QZPJ32271356.
Ruins of Alph (Lo-Fi music from "Pokémon Gold and Silver")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676dc6e992133ce67778b48943e5a70835247a547d1493d0f4ed9cf2e8bc94b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPJ32340283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676dc6e992133ce67778b48943e5a70835247a547d1493d0f4ed9cf2e8bc94b1. 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/QZPJ32340283.
Battle Tower (Lo-Fi music from "Pokémon Crystal")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e32027fc495c5dc1c4ab976a19a1b62a31f8246f939513673052c044b00d53. 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/QZPJ32365100.