thumb|Jujja Wieslander (2014) Jujja Wieslander (née Bergkvist; born 12 June 1944 in Stockholm) is a Swedish author of children's books, best known for her fictional character of Mama Moo which was ada
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 0xdfbc15b9434bab75a425b84dfba8a2c518ab4b38cf7497a0f16ab955464ceccb. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/828bafa2-4a23-4f49-b86e-cc118a6e7dac.json and https://artists.proofprofile.net/proofs/artist/828bafa2-4a23-4f49-b86e-cc118a6e7dac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mama Muh braucht ein Pflaster (Hörspiel)
Mama Muh und Krähe werden Freunde und andere Geschichten
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 0x7c2ba27e4e4023a00d9a4462353ee64d9c28557a0b17c22d1ae9bf92e023d975. 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/SEVNP0300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bb37c016225eb8dc6d955e3155a15ef173862a7ac0e0d289593c8aa80900c4. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SEVNP0300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56a11cd0971ae7664136ebd5e1157dd2ef6e2557e3c6e326486a695499868d6. 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/SEVNP0300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74268d9af1a6113cc35daebf4da738d5ea90101410ebbd87bc984ed1a7bd7c9d. 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/SEVNP0300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de3c1eb5763a0d4a5e6bfae084dc6b4f70fc9efcfd9352512aadbee38deed02. 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/SEVNP0300121.