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 0x90301ce77c0f1dcd9c81817df266aec90359034efc60f99de02d2ec53f4e844c. 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/80e40f1b-f518-48f2-a290-e1c1267733cf.json and https://artists.proofprofile.net/proofs/artist/80e40f1b-f518-48f2-a290-e1c1267733cf.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 0xf8e54772c98c8b4e21300089227e64e5ac126bc985f0ac10c3f73b43ec3bf9bf. 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/DERK42000023.
Soldatinnen & Soldaten (Flintenuschi Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f880313bc418a109c54d3724ab8fcd87c0e7dc10f71a59470c31a7da5f47c85. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DERK42000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4970de6494b44ae9090b3dd26e620fea69b1a53e829b9f778cdc1bccecf41785. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DERK42000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68db10074361ec0d0699061c784eaf400e8f00270b25f7ba13ed4fe91ce0ff3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DERK42000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d64e4da93c3bc894aafa0c780be89842fbe7f0f82c73c690082113322802a60. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DERK42100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0d17f9b9b560a0315389a6952de3d6ad2d3f2961fb25f7077708f4e81e56c6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DERK42100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e916257d67c4bcc8daaeafb19712f921f480b2ed2022fe15aa81d50391573e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DERK42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a899a275bc4ac78bc10774bb52dc7b5bf1027aefac08e646a05b51ec841d207. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DERK42200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca2dedfe0ce745cbaafc30381c49ef85c224f733a34aa1cf243fb57044fcd5b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DERK42200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196168f9cd76f3d38813b6a8cc993efa52b8db87a925c51534b76f95c9cd03e3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DERK42300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7ec51a3dac7665658f75cdbb8ed858a87bf6dc69b87439274073906dc7e47a. 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/DERK42300076.
Deutschland ist Kreuzberg (Gillamoos edit)
Deutschland ist Kreuzberg - Gillamoos edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a035279dc7dcf981170f61fc1d6e297ea45205f3ddda863c8e9436589c7459. 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/DERK42300132.
Deutschland ist Kreuzberg (Kreuzberg edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccad4caeb878a12f50054d5df6d8b9a4c33999097b5b4494931904614578ac1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DERK42300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca69a72afe34d1df3806eef3009a41afe5ae2e2c4191273be41667faf9caddf7. 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/DEZC62449112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ee895da8562a582e1960bafc6b0324ae1450ec3900953f2a3c9499f5494d45. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62457627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211845101260296f979f1211f3d78bdd345ad747528cac5a2d65855ba824b8b. 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/DEZC62455077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e3db168c4c52d94bd96eb908e87b91ce7c54a51ffb260d3d280cbb18d110d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2483180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395d3298c4c86815ee88a165d8c1750c07d869aa622cc3ea6c3e44e74b2230ae. 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/DEZC62464153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211845101260296f979f1211f3d78bdd345ad747528cac5a2d65855ba824b8b. 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/DEZC62455077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415c0b86f96f5277c261315c6d0fcc64f4239ed21771f7fc35408c66d2882ba3. 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/DEZC62575389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511ffa4fbfc4eab6a1692a8f2864fb4ebedeec8d8f7b25b803c709196590b6d8. 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/DEZC62575390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ce92c8cc83fc512c8c7f588ff8682ca33215343804203dfacc8d9659e93630. 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/DEZC62575391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63b3ecae8b969db48e4a97bdbfe714f48d6e174b5a79ba291382698e3dcd796. 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/DEZC62461150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423be38a18e98b7b31377ebd615e6462191c2b11e6d54d6044d8323a62e06a09. 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/DEZC62575392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad2f1e33e0c47f425e2197f42628eb2aaf2b0fb2c580a61b3a377efa814e8b5. 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/DEZC62575393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca69a72afe34d1df3806eef3009a41afe5ae2e2c4191273be41667faf9caddf7. 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/DEZC62449112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ee895da8562a582e1960bafc6b0324ae1450ec3900953f2a3c9499f5494d45. 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/DEZC62457627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1a4dd2e25420b6c9e897c4c35ddd432b03a10dc9a795fcec45092875cf920. 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/QM6N22440093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569968f4bb60edb91f44132613e2f8040398b683cd6f77928aa5795d524c78a7. 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/DEZC62575394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5719fa8efa72614050bf4c5476f209962719e82f19338021e313104116c9da30. 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/DEZC62575395.
Bild mir meine Meinung - Mit Bild-Redaktion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963ad8b49c0967a96ef83968e6d708495fc6f5d7ec479060d8f3d61243a9d86f. 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/DEZC62575396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f33619d600ab7bdbcfe7dc1bbeddc17146f940abdcc768ddcee1631427be47. 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/QM4TW2417945.