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 0xada02a418e812053814872969961e53d098cb144461d3474a1689813ec053663. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f6cffda-6718-4efb-8b3f-e0aaea639312.json and https://artists.proofprofile.net/proofs/artist/3f6cffda-6718-4efb-8b3f-e0aaea639312.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Royal Symphonic Band of the Belgian Guides
Belgian Military Marches, Vol. 3 - Artillery and Others
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 0x28fa03a48725b8f7ab79dc399018d8ceb0758c985014980b481ca78a8b1de8a2. 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/NLC350310302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd559dddcd1b4cda4ce6372ae86f404b7f6962139d765e73bfdba6264834e1951. 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/NLC350310305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc4b48f503a099e69bbc7d058c176bbe52e6feb96bde89d5c72ebbc9babe505. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLC350310307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4efcc4fbe96b92c94c6d4ef0b95389814bf97b36f49085d53db2aae91d65f5e. 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/NLC350310308.
March of the 1st Squadron of the 1st Guides Regiment
Belgian Military Marches, Vol. 1 - Cavalry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6762c1bf15c4e75b3b03ccdf3e98b42f974f383793794868d28e114918c8ea3e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLC350310102.
March of the 2nd Squadron of the 1st Guides Regiment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803376cded92cb1e4dbb639004ac7aed1832efd1f6285b18921f86674f6c00a6. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLC350310103.
March of the 3rd Squadron of the 1st Guides Regiment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f679a5e88a71b8ea8df04fed7f050e61c12acca3d942a6c5d3dcef350a7d213. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLC350310104.
March of the 4th Squadron of the 1st Guides Regiment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85137f916160971c37c0b7e4388579e0d607386e6d3c10094ef2a363577189c5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLC350310105.
March of the 5th Squadron of the 1st Guides Regiment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf22de6469d05157fa83ffaad8fe6182c07617ad26492b6d50c5011f074487de. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLC350310106.
March of the 6th Squadron of the 1st Guides Regiment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d9020cff56b31f3616e5c2b6fdf51b2a7c6432342515bcde693f65c8b25b3c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLC350310107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb23eca345b94751a009bce1d42318eeb7f39d50f4e2dfc5ebd4fd1f0d94cf3a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLC350310116.