thumb|right|250px|Pascal Schumacher, Dublin (2008) Pascal Schumacher (born 12 March 1979 in Luxemburg) is a Luxembourgish jazz musician, composer and percussionist who has founded a number of groups
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 0xcc2c47a9dd0d099cd5433a28998eef270583b036156bafa00c88a5fa98b575f7. 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/4e064f7c-bc0c-4293-88b4-7fd81c469522.json and https://artists.proofprofile.net/proofs/artist/4e064f7c-bc0c-4293-88b4-7fd81c469522.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Enja Heritage Collection: Face to Face
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 0x9a3fcd027f00bd0f62a33ca5d64ef85c2fa80ba683d303954ea1c2f67b8749df. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEBL61600703.
Re: Tropismes (Viktor Orri Árnason Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a41f547575ee3572f0d88b3f15ec57cffd455ebcf1e9021217920ccffd3634. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DES382219001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9fb50fcdb1e2091f44f42c3d9df6823a5b0bd1260a483ed7eebb48895c2b1c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DES382219004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7eae929098af673ee86c6006c4c7f0d7fffd17787f0f5c5a8a2f502ba42630. 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/DES382434001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051ba4b062a557b8169aea785361f95919743cccc5175cf724ff1468ada3b712. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DES382434003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8f139d304e5040639345dcd4325d22b164ae6fc97e06bf5ac3243664110032. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DES382434005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ec66c596152569fa071a08ebbf41ee1a5d36455a247ba322b3bbe41159924f. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DES382434007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb508e7c8267183783af07233f3bbfdecceca84219d3af6ea00b0d3d487e3a9e9. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DES380023279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17aa9618b71c1801b8ce3a55c9af091250bd44101a68b3f802c5f0c0869b4ee. 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/DES381702013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a62cc8a34c264b6831b862f0e96b4b86bcaa69e20a3247beb374ed5c73dabf. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/DES382241005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e96b67d148f844f13b34544959c82253c1a8f0b55a4c6c611660b544dc0733. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DES382123001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2853efc15a7b2d74cdb6774d43ba6a6a1fc0b3b2a8dce41f3c1875632b50a2ed. 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/BEZ250518710.