thumb|Wolfgang Muthspiel at Norwegian Music Festival, Canal Street, 2015 Wolfgang Muthspiel (born 2 March 1965) is an Austrian jazz guitarist and record label owner. He is the brother of musician Chri
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 0x27783028afdc175cf803b5d90ab3a46948352f29c09ee94745597b2b8c192cff. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/639f400a-af92-4b62-b298-fc998feb0785.json and https://artists.proofprofile.net/proofs/artist/639f400a-af92-4b62-b298-fc998feb0785.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 0x7f1e96856d9e778da400696068e9c11bbfebda2b20aac3d4122734757d0c2b5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332277201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7e79adb3195cf8cf7d7228e1d48f8e4b169c80e9c978c34063295b7d1e7843. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332277202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac3b6811c39368d066e2883477c0c1c23b4edeb3ba32838d3c9d7d2e91945e6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332277203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4636f0a1ebd9783caad6544dc8eadfeab62620744745e01e0c27acf9bdf765cb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEB332277204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2784f03c8b5cb01a4ad401e65881e7a14c5323f8e09bf445aac6e5800bd5735. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332277205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1e44113d2f052f6c1bd69df61d14968a03aaef700b9782fa23d5b5ee528a43. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEB332277206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ade9c77beccaa2c20c1a228908104e617ba220379b577115f7b778d07c1b961. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB332277207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa470849839cdfdfa47d5b4907af9e93b214749955927c7324474b69222bd47d2. 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/DEB331865501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9adef6746226a9a82a226c778446fd9f8968f17e0751c51d84a348b13e05df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB331865502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81af67a2f172955db2f2f328077c27f97528f3804f34f7c15380f53b6bad96da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEB331865503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184b88059d70e8b11030bfc66bb5d2bb8956b5f4ae38271b64496c4d8890fe2e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB331865504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb8fe43501263e680126f9ebb03583c116c54b40260165e13be9c4dfeda95f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB331865505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534ee6574076e9b8a7abac36c2ca2cba3788b9cdbc7804ae99b6f39948150fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB331865506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf12fa0283aa7ea885563e7c8708422821f55b2766d0c01b2562b7330fec1a91. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEB331865507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f041b177ab155b44c6bf2b1391a67c4c7e8a8ea6843610e381e956bcdfe6343. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEB331865508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef307e164a6b2d8a7790715f18baa51e7e9e8cdddeba1df445c9c47b335da9f. 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/DEB331865509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ade9c77beccaa2c20c1a228908104e617ba220379b577115f7b778d07c1b961. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEB332277207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534ee6574076e9b8a7abac36c2ca2cba3788b9cdbc7804ae99b6f39948150fd. 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/DEB331865506.