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 0xb9cc56597dc3548a21919beefc42a3135bc7189fe894568a498ef97ff2f5ec54. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14966793-405e-400f-9867-3ffbe1e976f6.json and https://artists.proofprofile.net/proofs/artist/14966793-405e-400f-9867-3ffbe1e976f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lacappella: Shimmering (Works by Ola Gjeilo, Simon Wawer, Eriks Esenvalds, Clytus Gottwald, Robert Schumann)
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 0x5ce07042dee1f755050da717dfea9bce9e638d7bdb13e498a36ad8a8a710dbcf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN421411001.
Motetten über gregorianische Themen, Op. 10 No. 1-4 (Auszug): Tota pulchra es
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645dac933b0b10510e1c5faf0aff336ce29d7537a6bac90b38226a3864375e51. 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/DEN421411002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de4a21f296382e47cf761e5f6223d24547c5307962528e7c3966a2fd184cadb. 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/DEN421411004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb281ac7816dbaa6e6e24568d8f9e56ce953e8fcbe65b26fc71655bcec26a77. 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/DEN421411005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda949f10d26d6ad776d1dc708a63edbc79748df67ff1ae171f5b33f41204ec62. 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/DEN421411006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8754c10c121e611e08351fdb5083d2d983e74dd51305e9c11b0a939f1a24be. 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/DEN421411007.
5 Motets of praise (Auszug): O magnum mysterium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92e0983bd2c340085fae0b7e613d5d0eb0b635ba7c307380869685bb0ac205d. 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/DEN421411008.
Schlichte Weisen, Op. 76 (Bearb. Von Cytus Gottwald) (Auszug): Mariae Wiegenlied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05673c8d31dd5d73e043bfb67d35efa050138569ffc4a1b7147f368727fa9480. 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/DEN421411010.
Romanzen für Frauenstimmen, Op. 91 (Auszug): No. 6 In Meeres Mitten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eb37b5d4ff08a2e8df0ca31357892ea7ed7eb65d79cf67eb02d1446b0a81b8. 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/DEN421411012.
Romanzen für Frauenstimmen, Op. 91 (Auszug): No. 5 Der Bleicherin Nachtlied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcc242cc8b4572e4792b7a299573d0e3c750541e3ee2b1700c3b6bfbe144fff. 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/DEN421411013.
Romanzen für Frauenstimmen, Op. 91 (Auszug): No. 4 Das verlassene Mägdlein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea724c14644ca058e5845260eb9c7b3ae5d293cd4c25c5cb7c836c5e4050989. 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/DEN421411014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ec62eb781d817a0a21a392bfe0711760d83e10afa68be312f920319224faf2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEN421411003.
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 0xbb0d878128e76eb2ded4f59b43568f1914558da78593432721fa5be42b958913. 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/DEN421411009.
L'enfant et les sortilèges (Das Kind und der Zauberspuk, Lyrische Fantasie) (Bearb. Von Cytus Gottwald) (Auszug): Toi le C er de la Rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428fea18e679e25ce891484281b5c9841897ffe47a30b73ddd760887b23f76d8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEN421411011.
Es saß ein klein wild Vögelein (Bearb. Von Morten Vinther und Magdalena Bauer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e94304e2f4b7d4ead8062f0e174d1bc8eb872cb10c65b1a8edc748a7912fda. 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/DEN421411015.