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 0x7b9bed8dea20aa72b4ffaf4890a58b9880960e2eec4dd16db6c2eb39f70a1cca. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6273af61-1679-4688-8515-a580b049bf71.json and https://artists.proofprofile.net/proofs/artist/6273af61-1679-4688-8515-a580b049bf71.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kein schöner Land - Die schönsten Volkslieder unserer Heimat
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 0x07f786a3e726ae5e22c0836c784143ddb6b8a760cfe4dc4aa3f397de41364e97. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN120501147.
Abschied vom Walde, Op. 59, No. 3, MWV F 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfca63affba1937f1c7f14c841c97504f925b9a45015af403ad550ff2253414. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEF059831923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16212fb385c0ea284637474b5d80ad31a6b0f57531f3c6d9c01b73d5fd7d71b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLA509202704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28798668e555bbd7865c6a424e1cee0cc7c6b4b5a3149b9d565adc056a2d7a98. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEF067800070.
Sehnsucht nach dem Frühling: Komm, lieber Mai, K.596
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b6eef2347d04cf6c491a0abb6dcdb7ba7cb504c69e889aa18f206387bcb51a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEF059403770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c203744ec824d42bc98c02050c72f6c5562e995ec5f971546da3d43a56ea65. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEF066300780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1695e525605e72ed484cd59faef2d1b0cd16436498835e4abec3ba02d34131a. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEN120501168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5002c333dbda8df312a817c472eda53be635ca79e1e3eff5321f86d25806257c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEF076709170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b78bb0b6d98961d69169f2d36d259d6a4998038cf3b1edf543626453cbeb46. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEF066100790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3572de610cca659df8776b4e31791ece48490449b4be8701a2f12eac959ebd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEF077003210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b0b1c92805a4d61db4de765d79ff627e2c9cde94521cc4afecf18776d84274. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEF067406070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefd9b63f6ec8a228b2b49229f25f21939ba7249c3489dd0cbbeb3f68d056fa8. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEF066000200.
49 Deutsche Volkslieder, WoO 33 - Book I: 6. Da unten im Tale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7c62da4e075c7b096cfb75432515b80b2bcb3592cee63d7353970ce2022eda. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEF056731013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff966f95e7e64b14efbc3dd1afe1b501d9ee99429bd51d4c38d139384dc0f2c1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF066511230.
Der Mond ist aufgegangen - Satz: Adolf Seifert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d261f5d634907fc52c74faea87652d6c266a59d241f321eaba516f35edba104. 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/DEF059831925.
Rene Kollo, Vol. 3: Lieblingsmelodien (1968-1984)
Rene Kollo, Vol. 1: Heut' ist der schonste Tag in meinem Leben (1974-1987)
Rene Kollo, Vol. 4: Am Brunnen vor dem Tore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590c2949db5c7e7976312be142e8492139295bbeb22a41e46dca6b13f6c56cb0. 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/DEU241109190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443d4a6b4cfd2e0c5fccf43e4a6cc028592c24c06b8a22417f1d543e883c0b02. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEU241109200.
Beautiful Instrumentals: Lingering Tunes
Merry Christmas (Frohe Weihnachten - Joyeux Noël)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2181f6408738592da1b7a53111a78dba7b62151871124ea9fc97510bdc50087d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEKN50810314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605056bbdd8fd94a225e005e162f52ba5516e2890ec6ad9b8350db9fde390ad2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEKN50900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4053415f13791890ab258531e1ae7f773fc857dcf98d8702b620c8e8f7bd5df0. 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/DEBB90750076.
René Kollo - From Mary Lou To Meistersinger
Das Land des Lächelns - Arr. Bert Grund / Act 2: Dein ist mein ganzes Herz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72a35899113436e02eb2222e4507628a1cf226e8797404e0ea87a83cf0ff6fa. 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/DEF077504330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c1984241501db9f86506956d289ac5eb33e5ed41f557bf83461fc027f2c3c. 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/DEF066201840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22c06bb293244d9e2d05dee6d904cef62b97e3cfac7ff2b657f91bdb737f09e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEUM70804502.