Vandaveer (Mark Charles Heidinger) is an American, Louisville, Kentucky–based indie-folk musical project, spearheaded by singer-songwriter Mark Charles Heidinger. Vandaveer has released five albums an
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 0x9d1124f2e0f040cb88afeb73385f1307ff9182a628932a7ebbb75c9a9efc8109. 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/e1256ce6-0835-4bf7-be91-4372f0b2615c.json and https://artists.proofprofile.net/proofs/artist/e1256ce6-0835-4bf7-be91-4372f0b2615c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5039824d705d622c3c14a6ad8a9e32af1551e864305afde2369c69708875f484. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:56:11Z), 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/USA2B0741302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb4e7e2827a7bb72427ad6790355c45a66db6fc68482390875ff4ce2ea84444. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USSZA0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca967ec18534d6aec5e3c67dbad87409011b165f7c76c32adae2c8a4535b21b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USSZA0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf50ed760f3a4247240c95395dd604369d2d86a91a07560a3441a2a2aabc679d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USSZA1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355264f8d250bd242d0790711b4123759ec7b33c9740a21912cec04ce93d8807. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USSZA1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a321d1ada54facfc13e05b1ad061b3724c53c5d7aae5028e4931188ee6ce7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USSZA1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c274f8830bee3274418d03b8a427da5613d0c2d5d39c342963e65b2d8a7b30. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/USSZA1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c274f8830bee3274418d03b8a427da5613d0c2d5d39c342963e65b2d8a7b30. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/USSZA1400002.
Marianne, You've Done It Now - Plaisir de France Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00c58d6c4403c1c6ec7883628855e63aab0b7ad1db660a9d0a24a6c6ea31c31. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRU451400216.
Marianne, You've Done It Now - Plaisir de France Revisite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66785d38b0dc0c96e199db0907bf02e426bf6d095148945475bc13628fe945e7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRU451000004.
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