John Kristjan Samson (born 1973) is a Canadian musician from Winnipeg, Manitoba. He is a singer-songwriter and best known as the frontman of the Canadian indie folk/rock band The Weakerthans. He also
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 0xc803ace8d1457ae8e9c54ece4ff071c29d4ca588c1a7527971910911fa31f6e4. 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/812f707c-05e1-4fa9-9730-9e68aaa8e1a7.json and https://artists.proofprofile.net/proofs/artist/812f707c-05e1-4fa9-9730-9e68aaa8e1a7.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 0xdc19ae392b369c63e72619df8b8e3b29ef5a070f56a4a4d1bddeff514948d198. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/USEP41127002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0982cc944778a30c61ba5f0e3520d74e25dd17bdbebcf243ad6db9c610d72d8a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:47Z), 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/USEP41127003.
Letter in Icelandic from the Ninette San
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc8fb06e475602d34cd7846873631e1e5c6292ef6603cc41e45875431da62a3. 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/USEP41127006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d3f3becf8fc9b34bf233904809fcf3bfe4b0b71324bef150fac8e92392b085. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USEP41127007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd979eec8cfbeada8fc038d536c42d1d7ce982d9b10b6a412145646a24d9bec. 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/USEP41127008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26ebefa66d07019d959dfa8aaa25fa74c81a6fd094bdd06c3af59c3d15920c3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USEP41127009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc19ae392b369c63e72619df8b8e3b29ef5a070f56a4a4d1bddeff514948d198. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:56Z), 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/USEP41127002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7afb7244264a61a88f4f06b1c65b56665a01d9c626659b47b301bf77bf6323. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USEP41127005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424776da11c1eccbd44cc37a0deed8670afab48c6fd4a77918d498b6fa8f2173. 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/USEP41618005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a67d0117fdb582bf00e69f6bd857de3e20262338dd2d16d1e2371524ba607. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:30Z), 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/USEP41618006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35447fffc3c11d0a0366b34557990e6751fdf0cf8634f6ac5c276133cc4f8ef8. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USEP41618009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c4cdd3dfb2407c07f9c60306eca813b1767d5fe1289a28f7885f5961e9db7c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USEP41618010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39fa83fcc4208c64219947b7c364958283eaa2c59b7ee78bdb11a8fa00b8483. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USEP41618011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4ad10be362d0654f048d743f27883c919f02e02a214ad87c4a13e2f99c34fe. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USEP41618012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6657864dc21609798312ece9ac0816e510ab0b96d158791e0961d8adf2e01d30. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USEP41618013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb29e294907bc72d55c907c1efc84aea86f222dd926a75fea6043221a46d78e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USEP41618014.
Prayer For Ruby Elm (May We Grow Film Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8245f1a1eddf38a6a8cafcc7adecea58866fcaca7c7b3b56163a7ec7e847dd. 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/USEP42023001.
Fantasy Baseball at the End of the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dec123ec178920c047804a0970135fec4a1499ce03e5fc08fe7fbdc3d894288. 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/CAL451132719.
Grand Hotel van Cleef - „Feldstraße 31+5“
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9770b4573bdc1029b1acf98f7c3239178fb3b18c51ca13516d2008b8626051. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DEAK80900014.
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