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 0x9665c280139e5da3a58c435da9d18c0beda4817243174ade070cb316c6a4ca2a. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b833aed-e727-4d79-a77f-642d26994dbd.json and https://artists.proofprofile.net/proofs/artist/1b833aed-e727-4d79-a77f-642d26994dbd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
March of the 1er Régiment de Carabiniers Prince Baudouin
Royal Symphonic Band of the Belgian Guides
Belgian Military Marches, Vol. 2 - Infantry
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 0xf910622ad4195064bd54dc3b83cebc0c9e0112019fb32edc6c37da1cdcfc0fd6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLC350310201.
March of the 3e Régiment de Chasseurs à Pied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0207d21cfbc239ddf024ce6a9ff69b29b57af4de21d0233dd2d5b2218ecefb6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLC350310204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed08059837044ac117623a896f2c755a6e9d1219a5b64927050c0b18d7d52551. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLC350310205.
March of the 1er Régiment de Carabiniers Cyclistes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7739ce69392f7fbf91f4ec43c6240231feb7917f910ec9cb30e925b0e1ec45f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLC350310206.
March of the 2e Régiment de Carabiniers Cyclistes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc85b56f92cb7df3ed089c13f7c7c94b37152b0bb318f9746219e21c7a56447e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLC350310207.
March of the 3e Régiment de Carabiniers Cyclistes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a85ee727e147778b5284995ff4a8c40d1665e48298954fc23f11215f130e23c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLC350310208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6dde3de4df55b008fce967750fb68aa932a31aa5cf88c585bcaadfe6823cd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLC350310214.
March of the 1er Régiment de Chasseurs à Pied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab14ba8003d885362326943612d6d263ff675a0d687aa194a7a758d4e99043e1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLC350310202.
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
March of the 2e Régiment de Chasseurs à Pied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff0f05b093726a60677b656181a80d5aab8b964c895cce6b368cc2a438a92c6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLC350310203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba55e2688d46c4a82589d2dba3e88123f8780bdade163a3d489f111ed8bab42. 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/NLC350310210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747076f769545c622414335486014ac41c6cde157fdb4afbaa86142a1b57a23. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLC350310211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50385b479a5b2dbe5231855bec594d1bbd79f09f06449ca1afe3e1ec16fbce23. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLC350310215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d2eed59e146e0d7d44ea2d263d113711315e329532e08121073ee21f4a5a66. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLC350310217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa22ab23726cf85fe557bb99a96a1affe9ab964bc81e5ba2ae90298e0c07fbf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLC350310218.