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 0x722d368c330023ea3ab887654788d25835a93f0c72a6e062a0f8d9b6399476fe. 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/9df48652-2124-4e34-8608-c763b32c48e6.json and https://artists.proofprofile.net/proofs/artist/9df48652-2124-4e34-8608-c763b32c48e6.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 0xca30d0efa5bc056941158eca0fd0de332e08250938160094a3bf68377273005f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEAF40400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f85a3f2bebb54eb4db3c7bf87c780751facef3bf20362b94108fe3a0fcabc7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DEAF40600994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d5038160d0af26119950f45a8dca6ca7cc285cc4bad95a7a2283520c24dd86. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEAF40601000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc6bd6937c1682313abbc2ec4749efb1327bcc9cfcc261e4889164d7bcdadb6. 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/DEAF40800723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdfae7b0f680b1c7149c860e67ab6af2644d5c44b9207225bec2436f9ef0ceb. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEAF40800728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c560293c5ac3dd5bbaa9792f0588feee3a4131e20d07279a5f9f164c578de6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/DEAF40900477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9958086a8db950c5465c788e47aeae9844a1c39e31004a9bacbef5c45f7afa01. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAF40900478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6350f2d683aab508647a967358c85e5894f3bc57e9bbf761c0f14db74e38a9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEAF41200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837af7e6567960b74c66a172f1beb09a54c79fc428af62ad3aa28ea5a4a32c6f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEAF41200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33934e30c1004732bec26f9482112ab65b69971cfefafda52022e2765fb39d74. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEAF41200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e22700620da006cf403aa8574a73d288654650c6a9a12d985d0ff3668e97f91. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEAF41600637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549b24d19301f08b0f7295582e001faa91eeb7b4fb878459c9f5f561766fafa2. 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/DEAF41800415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27098b696461a768e1b2c10f9d5fdf0adf000aad15236239902a7a9451ae8e09. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEAF41800416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc287993baaab24e9df6ba4ccec06f00754be9c674f74b4d3ed730c956dfea9. 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/DEAF41800417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a042dd1c4663ffc831bc7aa597132b29668d93741882f6349ada0837d92f156. 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/DEAF42500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412779202f35bc7267aa73543b2f708a7e1c5c36aae03db9b628ff50b2f739c4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEAF42500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb983bf053c5c328a11422ce2eb3fb74f6a0c8cdca318b7ffce46db0b5790043d. 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/DEA551634779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f85a3f2bebb54eb4db3c7bf87c780751facef3bf20362b94108fe3a0fcabc7. 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/DEAF40600994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45471b0c550f0bdcff86864f5e449fecfe574712b571fe6c0fc5efa4bab39f1. 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/DEAF40300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafce3093f15a286cab314b7af6540707bbd8c0ef9ec36dd34d656940c0d794c1. 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/DEAF40300083.
Advent & Weihnachten - Liederschätze neu entdeckt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41710a4acf70ad03198a0fc468e69255996a12069eac933a656ea70eb2cb8a73. 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/DEA551734933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38482df043c5d7eb9457cebebdb0e4bf60cd693f36b7906570df4d0295a654ec. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEA551734940.