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 0x1f6548d4812265c64e091d0c0ffe611c445950de27e0f4447f492fe5be858f4c. 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/e699efd7-2fcf-4dfb-a3f7-5abbdd926d5e.json and https://artists.proofprofile.net/proofs/artist/e699efd7-2fcf-4dfb-a3f7-5abbdd926d5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Meister der Entspannung: Tschaikowski, Vol. 1
Klavierkonzert No. 1, Op. 23 in b-Moll: II. Andantino Simplice
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 0xa3a9bac404f915b2126b729ea6e5b5c4fef9de92b9aff03e5194a217ae40677a. 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/USRDG0110575.
Die Jahreszeiten, Op. 37a: III. März (Lieder der Lerche)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb009c1da8d970176120588330d2bcd8d76c7c296c78df25469bb1d14af5609. 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/USRDG0214301.
Die Jahreszeiten, Op. 37a: V. Mei (Helle Nächte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10678673bffc20204ddb9001fcd2e0dbbaa82308e97e8123a9fff98542b0a1ff. 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/USRDG0214303.
Zwei Stücke für Klavier, Op. 10: I. Nocturne in F-Dur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f3d161a7aabaa0dc6d4e63b8b5fca6e5771641a0a56d294e162a77ac460aa8. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USRDG0210026.
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
Kinderalbum, Op. 39: XVII. Deutsches Liedchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd822c6d0a74521f147dabff19a66a9dd1806c187698036585a48bc8f06b99e5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USRDG0214327.
Streichquartett No. 1 in B-Dur, Op. 11: II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90e4ec028ae1b290cd5120d923bbde4c03efbbab41cf3bbf63ff921b13db83a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USRDG0223245.
Die Jahreszeiten, Op. 37a: I. Januar (Am Kamin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb1e3dfee1e8e0f9218293f107ce08e83f1337c47e3a5e7ab114abeb3d6e79a. 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/USRDG0214299.
Der Nussknacker, Ballett-Suite, Op. 71: V. Arabischer Tanz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68842e68c93ac8b1a0bda44081c996e5abe6b7fa463d98855bbdc0d482f1636e. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/USRDG0210795.
Serenade für Streichorchester in C-Dur, Op. 48: II. Elégie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e5d8c92e0278f447d3193f4983c892ffb85adbb61c5e5a3a11f54b03fccdf6. 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/USRDG0114074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a21bec739b319bfc2e8944c658f0170f77987a9d8c3eeda826cc2d0479e523c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USRDG0114965.
Kinderalbum, Op. 39: XXI. Süße Träumerei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4141aca2b124304ffd534a6e21ae41820369839863b8837ee2f99abfec1665e8. 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/USRDG0214331.
October 50 - Instant Calming Melodies to Chillout
Stellarer Sog: Celeste im Strudel der Galaxien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17f8a3bfd91f7ca0501a1b1e0c2e914343df0b0a761cacfabc3683f0a530566. 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/PL0B62369461.