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 0xa8274bdfa38f646fa797e7fe3b46b01b98a317060e409257e62ebaebd16595d8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61847909-0f27-446e-a149-724c1770d1f7.json and https://artists.proofprofile.net/proofs/artist/61847909-0f27-446e-a149-724c1770d1f7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Liturgy of Orpheus: I. Orpheus on Olympus
Markopoulos, Y.: Liturgy of Orpheus (The)
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 0x6810c74649e55456e4daf2082ec76542a065d1899d5309f31192efc8bb48ff9a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190874701 — a six-check JSON result.
The Liturgy of Orpheus: II. Paean - Ode to Apollo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e44a563fe9668d74ed88ab5347f5182793661e9cb9beaae52894eb9f7319eb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190874702 — a six-check JSON result.
The Liturgy of Orpheus: IV. Gaia, Mother Earth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13a4486c02245c8b27ceb334f526dc2ccb25e6823f0c13cb2b58ed30df862cc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190874704 — a six-check JSON result.
The Liturgy of Orpheus: IX. Eurydice Awaits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37dd6d29032d363ef365bd8dee60b81ed912934e44838b58f5e000ea7556245. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190874709 — a six-check JSON result.
The Liturgy of Orpheus: XV. In the Manner of Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2805ae27d628a382069631529e8aad676fb7380eb5e913fc5ba4b832881dd3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190874715 — a six-check JSON result.
The Liturgy of Orpheus: XIX. Paean - Epilogue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b73910c98db9f750c298193803e6b06b24b9bb179b908fb05bd46308ce3d47. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190874719 — a six-check JSON result.