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 0xf8b84b7b061f88dbf0806a64a1540f8807063908dce50ec6d6dca1c610d06753. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f02e565d-732f-4f24-9ebb-48b09e1a066d.json and https://artists.proofprofile.net/proofs/artist/f02e565d-732f-4f24-9ebb-48b09e1a066d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x6e385067823957b4d5e7298484071ca38416f5801805c641fe521da3e5a94b9b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY332302389.
8 Nocturnes, FP 56: III. Modéré mais sans lenteur. Les cloches de Malines
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096680f2c63e7c6cac5937e74af7a0e458d2bb167b9e7cb1e37b41aa72c7edd3. 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/NLY332302391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb3f3bf813b4484d195f21db668fd21ed52ad114a09cc3cfefda177305e9086. 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/NLY332302405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09e3e1cf326de00764f878a8e72238c48ed5a9eada2466f5062354768f353cc. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLY332302385.
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
Napoli, suite pour piano, FP 40: I. Barcarolle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5605d0be7d78efde58ec3edd45cf2668ea8ca81f90a83a0de4ddacfd94ff5ce3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332302386.
Napoli, suite pour piano, FP 40: II. Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a88a3adb28a57ec579cea560235f332694c7290dd68640bd758a475389b5ad0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLY332302387.
Napoli, suite pour piano, FP 40: III. Caprice Italien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48f58eb358bff9b90e3b44d9b211e525a3426ea8cad43420acdce009f161447. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLY332302388.
8 Nocturnes, FP 56: IV. Lent, très las et piano. Bal Fantôme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa06ef89f0e0600f00458ce861d7f354567c230b4b4751f67d9633903164a7. 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/NLY332302392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56679fb14c8694c60c21d5169696654f4481e565a651c83095ee0b11f4204ca3. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLY332302398.
Valse-Improvisation sur le nom de Bach, FP 62
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58b434a0378b9c2a527718dc305b5a14c435c12f8038c911b3c4a7403e6f577. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332302409.