thumb|Tommy Engel (2012) Tommy Engel (, ; born 1949) is a German musician and actor. He was the lead singer of German band Bläck Fööss through 1994, and has released albums as a solo performer. (confi
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 0x39da93eef0bedf7c6dbc6710e5f8129a18a6ceba33e2112fa7f6cf233a91efde. 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/6c05e654-0024-4161-ab07-582c7ef1d3d0.json and https://artists.proofprofile.net/proofs/artist/6c05e654-0024-4161-ab07-582c7ef1d3d0.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 0x5666f818ac3534f7ace3a9a7603d2bdad37a3ef8f4e132a1535652a0bc650a5d. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DEA349901125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46e8a243366bf8c4f515a4b2fe2f210e65f9ae6fd5c3911b48a8e494fa4e23b. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DEW272300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc29a10fd2b9606408857d62f9bb625e2a487e098c326ce6d1ace427bd48949. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEW272300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fffc435300060a4e44393451e0ca6d5bf18170d276d0d132d6074b72d7a9c34. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/DEW272300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4697c4fba3ce3eb451c0b675d404374a4f83d6dcb22f2e0316c83e561cd4e1d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEW272300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde68d9506418f73282d8c9ced666fbdf5044480ca6e8413f9197e88c44e4facf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEW272300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1051112c126130ce2f5da635b9484421732b2edadd102c7403b4b8d4727b050e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEQM61400918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e457438cbb8c9e6c62e3e8fe5951103d3510fcc065ffa2e1fa941d742b739fd. 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/DEQM61200046.
Ich Sage Was Ich Meine - Trude Herr Special 2007 [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dcfa95fff329d98ad6037053bc86227eabecf6508d124e118f5cf0fa63f66b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEW272300156.
Manchmol - Trude Herr Special 2007 [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f2e39934a8ad4c6cf1278391a00be52fbe4ccfc876ab03b32b804016a2d856. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEW272300157.
Die Stadt - Trude Herr Special 2007 [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfcf386377d901d3b3840c57e192425b24a2380a54b86c07f56d502538aa653. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEW272300165.
Niemals Geht Man So Ganz - Trude Herr Special 2007 [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95835d94328355c9f05bc8dba69749e1e2a5f8742d04933984eebdcad9a156d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEW272300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf737699207451379a93a9b0f15ddab21b0264ff6a5bfdbe8bbe2ecf8b435e4. 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/DEC371300932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1709cfde94921a6f17692d62632213d00edee56ca28881e1e2918e561be89fa. 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/DEQM62203758.