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 0xcb8d41f9cdf4c2c3c2bf5993b4c0e0fea48646538d2fc392d28e2bd0b6dd4afa. 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/11cfc6cc-2ee6-475d-96a3-cd60cc43a91c.json and https://artists.proofprofile.net/proofs/artist/11cfc6cc-2ee6-475d-96a3-cd60cc43a91c.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 0x639f840144fb35789b131f5b55342224b9b1ea5f75e2d264d9f9d91deed9f024. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEOS71100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc885c62844a420351c1c7292423b1bdbfab68bd3d7baa39af4f4d2f5e74a23ce. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEOS71100030.
Dirk michaelis singt... (Welthits auf deutsch)
Dirk Michaelis singt... Nr. 2 - Welthits auf Deutsch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc9afd88017886f6dea71258c11310c98f00f0ce448e9287db3a2b09a383153. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEOS71300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f89325d69998a806c85763693c1a6beb697b6eed1df21ccf29c6a361a4b08fe. 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/DEE250700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee355a8f1b393772c5b8fd5487073cfce0c729c8c1924dd963a759cda67dadac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEE250700052.
Ost Schlager: Im Osten geht die Sonne auf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d603f4bb23ad8e1110c82cb5203558f04e90553a50d9a015ac1fd1922b1428. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEC719400507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d603f4bb23ad8e1110c82cb5203558f04e90553a50d9a015ac1fd1922b1428. 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/DEC719400507.
Als ich fortging (feat. Karussell) - Kyau & Albert Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766d5805078e51119b7a4301b7eee9c43b30af2d883b1494b557e9b067a6a234. 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/DEC730300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5ed67b268ee3ef73f1accd6f496f8512b78859a6b967747e78212227b307fa. 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/DEA340500906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb3cbd434f663d7c054e3cdc1dc3720b858251d8e970e7667c99b055aec83bd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEUM72118818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63291f7a21c515ac900099bbe7315d1226f3eb52fd4d3d6fd230ff8f61a38ee6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEUM72118824.