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 0x0ded69a4637f5611dfdde45b2fa5a7c12a3fbaf6d5efda4b1202e29316996a56. 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/b7340958-4296-43ac-9eb8-8302b15aaa3e.json and https://artists.proofprofile.net/proofs/artist/b7340958-4296-43ac-9eb8-8302b15aaa3e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rachmaninov: Aleko / The Miserly Knight / Francesca Da Rimini (Excerpts)
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 0x45f9c3fa65d5b0e44f41f6ef039aadf606e5f3014d3ea06c08e37b11a3635c0c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI190574501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaae47b7f559d826741f4ac7c8abd59fb2a60ed32326fb34a0c0c124e213e68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI190574504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25defc9962edd6676a8ca610e68a58323109254f91c3eb422497b965b19f653e. 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/HKI190574506.
Francesca da Rimini, Op. 25: Scene II: Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2902ee7a9d370193404dfe02c725df6ca982f1f6a53fd769b1b51e90c6ccdd. 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/HKI190574520.
Francesca da Rimini, Op. 25: Scene II: Moderato (Duet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcf2d907a6c21c44b05c9733bb0615a75d0faa65d8ef2375c0e54a05b8b5ba2. 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/HKI190574521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c50e43bc8f1fc441e22e1c8bedad323629b9e958ba14c2eaeecae4fd45529. 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/HKI190574502.
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 0xa77bab8ffd9307d0ca99e6487a0b2cee2400dd8670694b666eb188b599523c2c. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/HKI190574503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5597bded90459f47fd097d061e9a90f7f154606acd81e71e1f0d9aff4f8878. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HKI190574505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16c7ca63984b39f02759ef187653648d381fbeab8df96cefa98b0384e6e3e05. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HKI190574507.
Aleko: Finale: Agitato (Entrance of Aleko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9442ed3d8be7a41ebf5c11d3fa268a7ffdc5eaa5df844fa72741ac5675acaa1b. 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/HKI190574508.
Aleko: Finale: Moderato (Death of the Young Gypsy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5c8251acb03fc60c5ca075e77edabbc62ad996c0cbda22ecad552e2c5ab387. 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/HKI190574509.
Aleko: Finale: Vivo (Entrance of the Gypsies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00c5be12e5b3061a038dc69abf7a0ff8987187e2df652daa506bbf28b111f0b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI190574510.
Aleko: Finale: Moderato (Entrance of the Old Gypsy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2851f937b0a387109b8d482de246d94f0460e45a40e5c453d10f4e61130c7. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKI190574511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05103db7d9162adada3cab362861c9927a6f528b9bca39b3f63581e95ceb523. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/HKI190574512.
Aleko: Finale: Lento lugubre - Alla marzia funebre (Aleko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb897ae9deebf9db924a3899ebedf68ee35505b9deb0639aeebddedb93e7f9ca2. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKI190574513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadad676c4a8a7616bff229203188f0016904bb06d0921d2f1136f41024e63dce. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HKI190574523.