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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b8f60f6a5eaca3399cf611074eb8db86e1a789d98910ad427083acce5778f6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73504020-7d18-4ea7-b670-81d1d097053c.json and https://artists.proofprofile.net/proofs/artist/73504020-7d18-4ea7-b670-81d1d097053c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Klassik die man kennen muss! Die größten Werke der Klassischen Musik
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7d6e92818c019ae3143b21f97eb5a46a3347dd80c9d9982eb9a267ad6101cf. 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/DEP621800035.
Die Vögel / Act 1: Haltet ein, verruchtes Vogelzeug
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b821799680224f2e0a767159ee3b4c8531f0439f6236356304ed5cdaf0de35. 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/GBF079443510.
Die Vögel / Act 1: Wie tut ihr Vöglein mir leid
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80690581c0cf475e144786dbec96c7fb99db776f4119d1d0818964c97e630b01. 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/GBF079443511.
Die Vögel / Act 1: Dich zu ehren, wohl erbötig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee90c794961e4d7d714e8dc4e3033433a8b273030eb2bb040768aad5568fe02. 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/GBF079443513.
Die Vögel / Act 2: Ah! Ah! Narzissus, zitterst du im Licht?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffa6d8d4e87026e55e8070890bafabff8533b9420623a59385dc4803bce4ef6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF079443514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb675272641d1d2067c3deb5a3462b10c88f68f4ff410376a962ff02719e3387a. 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/GBF079443515.
Die Vögel / Act 2: Ah! Ah!...Groß ist Zeus! Mächtig ist er!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf72c84dea6fbd989cf997fe8661c9190a5d9a45eb2409cd548a77a1c8274ed. 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/GBF079443527.
Die Vögel / Vorspiel und Prolog: Ach, ach, ach! Liebwerte Freunde, gegrüßt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708610d86c16039b655f4fcdd6fce6799224745576a3b8b94e741bbc9338e70. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBF079443502.
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
Die Zauberflöte, K. 620: Act II: Der Holle Rache kocht in meinen Herzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c273dcb416c8d632950412d5705668795169d49cf31d4cdbfb11cbbe15f30f4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USB8U1601101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0b00e1615c498d24575ece24822b7f8e5524c73acddbcdaf12d28322a37438. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBF079443508.
Die Vögel / Act 1: Nun erwach, erwache mir Freundin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b29638736b2248a77642a84e66daf68c9f2ef259bc869645eff5aa9697a005. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBF079443507.
Die Vögel / Act 2: Laß mich werden wie du
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd838145a28a93d2cb45dd16ac07be55a7c97400ff216734fe67775588aed45a7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBF079443516.
Die Vögel / Act 2: Ich leih dir meinen sinn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f00c36b656c8ed6f4b2a34105ded45900ea837c8bda6c2d70b29cfff1ae447. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBF079443517.
Die Vögel / Act 2: Horch! Es wehet der Tag heran, ich gehe zu ruh'n
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e3c93fbc8f2c9c42b768cda4188dddc19ce8d20912d1499af64b05677c50e8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBF079443518.