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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6649ab9d49f2ef50651e36c1fc17d6adcd5b5e5086e78aa919f6f605b270fae5. 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/eb2473a1-53a4-483b-b663-00e455460287.json and https://artists.proofprofile.net/proofs/artist/eb2473a1-53a4-483b-b663-00e455460287.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416643eb8f8b05bc566370c59b06681504e063596af9fd66b1ac086b49fb927b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:55Z), 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/DEAR41181714.
Marsch aus der Zeit Friedrichs des Großen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03df5e579368de7f25b967668ca51e13b4e6296ea3aea8dbe997d611dfd90aba. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DEAR41317605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceea8e883527a42527b1a80e4bfd83bd0cd9158affd12c41181bdfc96f2125d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEAR42481899.
"Freiheit, die ich meine" (Märsche des Reichsbanners Schwarz-Rot-Gold)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a5d75140e1cb1060fffe6403c79e144f12d4ca5291a5bff0e59389bc8c18f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DE1JN2446759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9121552ff0473dfad5c19d1c762b2bb65bec1fc6366bea75a14f097bc825695c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DE1JN2446648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b55a75a5e5e49c236571fecbc25b70df950b8a39487912e10628a079ea6e13. 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/DE1JN2447030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f8046c0ac4610d1aa49f59aa1420c3223629f6840111370f710dd38c0f200e. 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/DE1JN2447019.
Freiheit, die ich meine (Republikanischer Zapfenstreich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752c1645095a4fd7c662d8ba97f03c83a0c4fba3d5b94fe7c3084f33c2881ed1. 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/DE1JN2446664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66624dc53f578a6cff8fa0c7832a74bb5d618935c6888c838916dfd9edd373. 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/DE1JN2446684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9db484cbbd15850cf3282f969a287a0a8538c247d1e97c72c3f02cf195f30. 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/DE1JN2446776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe8a1a5606ec85b42004c5ebbfabdca305ce02b687013597e0f48c20556cff5. 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/DE1JN2446655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e15f0949ec68b6a5e8c9ab3e5f9c3ba5b6f62b1520c54f08d58a99763845bdc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DE1JN2446806.
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 0x3fad9e7a71312b8a42551d3f525c624fc6895d5451c75af98360deefece1b3cf. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DE1JN2446854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa235ef8f9818d9c0ebd847203492017d60d080ca0e21e67a08eab5104e8655d1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DE1JN2446819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9bb02b58ce38cc3cca6843d4944630a1206d98001c2118c05360c286e419fc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DE1JN2446844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abfefe461b2a2d3b394b1994d9a2462a2e7663f7a08f994c81b94ebcef1019b. 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/DE1JN2446799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65b7ccc83ac1967d19adaf901952bbe69d3d87efe81efe4e2b84873610eca95. 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/DE1JN2447054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d9d706c90de173fb38a187c97d0b440aaf07387412ab1ba7eeeb3787a664e7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DE1JN2446650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ea3add10c26dfba1aad2128d2b60d50bb296bbdfb8cec0fb05990be7b55ead. 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/DE1JN2446751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc436c18d402ae8be57e732e47a91eab6fe03929c54b4600abe4e826da61de024. 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/DER751526809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b18185a6d6990bd78e45d3aadffa8c2d3b641574759ced5b2dc66bb0676ae3. 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/DER751526823.
Jagdgeschwader Richthofen (Fliegermarsch III, 39)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93f34451e13ae61bafe3390db6ebc3cf85176ccf7d4327dbbba2f66ebb3959b. 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/DER751526814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c65cbb174812636964d9ff33f8ca1c031c4ebbcb6dd10f913e17f9dfef798b. 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/DER751526819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f376fe4539afbf9fc1250ac87722515a18491c7924297e15e0f17cb956b340d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DER751526841.