Ellefson is a surname. Notable people with the surname include: Art Ellefson (1932–2018), Canadian saxophonist Ben Ellefson (born 1996), American football player Christian Ellefson (1842–1925), Am
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 0x2c24d14c9b12d89658c7a65e7db31a1a280c8753469280d377aaeeb81287ca18. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c0de69f-21c3-472e-b492-bf418c54b76e.json and https://artists.proofprofile.net/proofs/artist/7c0de69f-21c3-472e-b492-bf418c54b76e.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 0x3e0a9991e5b703e5087bc232863df7c69566bfd8e590b83ed15a21e559494e4d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QMJFD2007301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a6ca7d9cde3043eb8ba45e31b2ad7c54caf86438e63d40d4fe4672f00a4de. 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/QMJFD2008307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1500dad8cdeef748727746dd3a47992da13011f43eb314feaa44f235e9412f. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QMJFD2008301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d32ce335db27fd72cf5c9e169880eea302b1a852ead93f3bd0ec8acd9a06cb. 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/QMJFD2008302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72de0974d2d11b4214195937ead1a99346eafd4e2e2fa76278988b134e126010. 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/QMJFD2008303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92ab40f6d15d372bf867d5fa8eab3a3e83e028c5f1c0e2cdcd2af3c54f37931. 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/QMJFD2008304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b77daa7c86cd8fa999ad49c7b3caa5f19b0e30386cfec3586a8b9113e03c2f. 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/QMJFD2008305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879ee3b6a8583c4f931412c3b31d6d0f27c5281a53229e302c5922cf7874208f. 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/QMJFD2008306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0481aa44fbc3a64cf8918a70ac2c356b91c3aa7ee0eebf868f263407eb92efc. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QMJFD2008309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1df02c853d969be330a5c555446f95c8386442c543d581c0cb8207c05e95eb. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMJFD2008310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f7cdbed6205079bc26f453f5f630ecdf56f985e87a23c14195f82bbb72ddfc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMJFD2008311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad3f9646ba5fa5d9e2afb36f8f5c2ebe1faafbcffe09c38848a2f89afd121cc. 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/QMJFD2008312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26ced84c225de5f5aff8a5045cd74230d4832015d16981430f94251a28555e7. 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/QMJFD2008313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73abace9d0c0b8079b591b6e877a177e58ad3691f5e585d8ae193f257f7c43f. 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/QMJFD2008314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd25c788b8c35db59e600b2db1213551e312cea7512f54965168573ebeb3316. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMJFD2008315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893bcfec6846fd4d95519680815ba4b84b832d44795a594c54059f40cde1f84f. 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/QMJFD2008316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4c5f50627ca68d63d0539bbf4268807616955cbde6257008edeff216da2eb6. 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/QMJFD2008317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c95f1f764c6c18156f8535b08c6e5f67df956a443cac2a8c7d69c47ba53468. 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/QMJFD2008318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1cc01f1c3dee28ddb1abc1594357afbb31dd541362784034fbcc4a660cb1b0. 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/QMJFD2008319.