REDIRECT Robert Metcalfe (disambiguation)
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 0x36753dacaca51dca4df2c29255d49e9a3a0e9181807b7b7c4e24e7eeb803adad. 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/3b71c3d7-a7de-4a88-a1eb-2a62a04ae6f1.json and https://artists.proofprofile.net/proofs/artist/3b71c3d7-a7de-4a88-a1eb-2a62a04ae6f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Robert ist da (Lauter leise Lieder für Kinder ab 4 Jahren)
Das wilde Tier (15 überlieferte Spiellieder für ungezähmte Kinder ab 3 Jahren)
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 0x4f79e80fe3f9d9aed8a4de5e02f4315ce17fec267168facfcf87d844d41c2ef4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:51:45Z), 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/DERT91410052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4bfbee10f23974e051d1e755a759f9e9fdb3f99dd01ca48d5f996f4f6a6f70. 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/DERT91410055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eba5130dc3aadcf10788388df72ed6504050bc4e9d6a13cba7a6173dbe4ca0. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/DERT91410057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde643f09f906e65d2c144d7dcbaca3231b9eec3f189006b148b778ffa8cd9c01. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DERT91410061.
Ich und du - Schubidu! (Lieder zum Kreisen, Springen, Tanzen und Singen)
Englisch Lernen Mit Dem Kleinen Wassermann
Learning English With The Little Witch (Intro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9363cc7fee13710506e245868acb8e04e11a67b59a8d54abf7f238e342aadb16. 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/DEUM71716016.
Englisch lernen mit der kleinen Hexe - Teil 01
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde945d016a82199aa65ef46514b11b564b1312a590e4b0a8a7a6a4cc01cfec8e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:27Z), 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/DEUM72112844.
Englisch lernen mit der kleinen Hexe - Teil 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5edcd511540bf928214abfb04e0eb410df89374a28cdec41e90892509708bbf. 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/DEUM72112845.
Englisch lernen mit der kleinen Hexe - Teil 03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6ef76cdcb9be0c1073deff7f859b3ddb83cac0c61334e2ff892b1876498b06. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEUM72112846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d630789661704b6fff4eb17b0ab41d30a1324951e11671262f98520f5a6492. 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/DEUM71716018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d3d05cb14c5a1f22ac929bca2caa01aa86f4b5bfa0633f1283087651680d96. 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/DEUM71716019.
Englisch lernen mit der kleinen Hexe - Teil 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6479b34f70f6b67159b9130966b0923606e07a7d4b438dc4a31eecb23be9c7e9. 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/DEUM72112853.
Englisch lernen mit dem kleinen Wassermann
Sing mit mir / with me - Zahlenlieder auf Deutsch und Englisch
Ich bin zwei - Und schon dabei. Erzähl- Und Spiellieder für Kinder
Veronika und der Weihnachtsmann (Ein musikalisches Märchen)
Music Counts! (Zahlenlieder zum Englisch Lernen)
Zahlen, bitte! (Eine musikalische Reise in die Welt der Zahlen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f00e0698a6a8faa67c33f219ce6a426da9eab446e4d2fb3783cf2de3997da50. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/DERT91410104.
Zahlen, bitte! Instrumental-Playbacks mit Chor (Karaoke-Versionen zum Mitsingen)
Ich bin 3, kann allerlei! Spiel- Und Bewegungslieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99edb056ff660d82e676714f2ddb8d624dce4630bf0858b7bca7cd6c4d63d60. 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/DERT91510183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a84ae899939901e24fe013b68ab49b2bf6c6e0bd9f2ab5a9d309e2fd0b7f9c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DERT91510186.
Mathilde, die Mathe-Ratte (Lieder zum Mitsingen als Karaoke-Versionen)
Hase, Bär und Känguru - Tiere sind wie ich und du. Die schönsten Tierlieder zum Mitsingen und Tanzen
WinterZauberWunderWelt (24 Lieder und Gedichte)
You sing - ich sing - we sing (Spielend Englisch lernen mit bekannten englischen Kinderliedern und Reimen, gesungen und gesprochen von Native Speakern)
Vier Kerzen (Poetischer Liederspaß für die Advents- und Winterzeit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046a7f7520ece512401076ffc79fdae903315f744da090a2318b658edc5bee3f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DERT92210452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c1b697988a5a700839d38d64b03140a554616526ef237552cfe08c68a2894d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DERT92410510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dd32ba5fad0a73644cbbfe545cf1f2b156b5c1e66bb8cd1acad32fb61e328b. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/DERT92410523.