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 0x43b1652d0c8c55f70c9b3f100354503efa15b4861339849f8bbd04fbb95dda48. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9513f3da-cf9c-4518-ba0e-7a1c808db194.json and https://artists.proofprofile.net/proofs/artist/9513f3da-cf9c-4518-ba0e-7a1c808db194.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x06867857a5c8404ac68b236dd7fd48c00566c05bdedd099066f52879611f3c1b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFI85900073 — a six-check JSON result.
Fools Rush In (Where Angels Fear to Tread) (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2f5a0ec34f43e518dcc79d9bdeb53b7ff55d68f61953bcf267b4066462098. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM19927354 — a six-check JSON result.
My One and Only Love (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3d51b569e9580c7278a62ca3a955f72f598472fed4bcf98bd1aff9a0badc82. 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/USSM19927363 — a six-check JSON result.
Close Your Eyes (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e5659f9a7a6c338c24162f41c66f37d234b1b85858c30c7dc9da060c0f85a3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19927353 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2f5a0ec34f43e518dcc79d9bdeb53b7ff55d68f61953bcf267b4066462098. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19927354 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a3421fc21f60b4f5df402d9a0c8817de0cd335869b1abe7385556df33318ec. 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/USSM19927355 — a six-check JSON result.
Nobody's Heart (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630402054d0f18560ac89ebabbc5bf1cd7871ecbaa26d1f556e4b5816df36c2b. 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/USSM19927356 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dcc2230f93520c45691255969fb607b66c0099014343507890dae32a3444f1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19927357 — a six-check JSON result.
Who Are We to Say (Obey Your Heart) (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16c9926e550cebeb8ba0dcae56ece75022644880a0c68bf6cb8612629b8c441. 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/USSM19927358 — a six-check JSON result.
Daydreaming (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aacae3a1d65e4dd31ced0fbad4f6e18e57c64c520a2352a42de72fdbc27b20. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USSM19927359 — a six-check JSON result.
Give Me Time (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771bbe6fede6f309095299a374b1526d539d4aa1221d8a1df4720e4acfce7569. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19927360 — a six-check JSON result.
Control Yourself (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a536ec76a115c46d1ad623f6f6639ded2579417c836410bd989ed59a5247297. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USSM19927361 — a six-check JSON result.
Wait Till You See Him (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cde7a654626933632b961c76d6098e2a4a6e9084e06d8d6ca6337afcbad40bf. 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/USSM19927362 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3d51b569e9580c7278a62ca3a955f72f598472fed4bcf98bd1aff9a0badc82. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19927363 — a six-check JSON result.
Falling In Love Again (with The André Previn Trio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd095a2089d79ea965e2babed29ddc784dec3d21a208adb083c1d9c18b8f5a65e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19927364 — a six-check JSON result.
You're Good For Me (with The André Previn Trio)
Golden Girl (The Columbia Recordings 1944-1966)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5ff080083e45972d814363cd939959b62eb2dd791c69982bcc124ce5fff1cc. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM16101039 — a six-check JSON result.