N/A (or sometimes n/a or N.A.) is a common abbreviation in tables and lists for the phrases not applicable,Barbara H. Foley, English In Action (2003), p. 192.Alan C. Kay, J., Metzler Contracting Co. L
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 0xe337c723c5059722ad86121bcd6982ab74f5d976c91ecde22a4ada7da2254079. 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/b1b5bf1b-6ba6-475a-84f3-469b258ed4e1.json and https://artists.proofprofile.net/proofs/artist/b1b5bf1b-6ba6-475a-84f3-469b258ed4e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stravinsky: The Firebird & Rimsky-Korsakov: The Golden Cockerel Suite
Music for Flute and Piano by Women Composers
Serge Prokofiev: Violin Sonatas and Five Melodies
Turnage 'Shadow Walker' & Berlioz Symphonie Fantastique
De Dwaas Zegt in Zijn Hart: Er Is Geen God
Royal Symphonic Band of the Belgian Guides
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 0x19828d748c9b220aedeb3c0f2ab9c63df25a05d598914248a4003a63c0f77489. 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/NLC351519901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b97d414577138c32a4768df3f825badac3371f3b70fc799e8865c4613042e. 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/NLC351519902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b5aa36faa734e8f88ec3f4dbaadefd62c7d63fa4171bd7886290be6413ac2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLC351519903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2da9b3ebfc10d8bdc2f3b6d0d7687cf893682fdf1ace631380e337844325e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLC351519904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b2e377666cbcf2f36538eee8b8876c6057297f0c4053e23635dae13de3c3b3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLC351519906.
El Olimpo de los Dioses: IX. Ares and Athena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c09648337b880bf1203d02995846ff32bc6af759794c8877b03100735594a9e. 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/NLC351519909.
El Olimpo de los Dioses: X. Zeus and Hera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2fe2e72e94754e0846ef92f7f3ece2d450995a614ea938e75e71524f885142. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC351519910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bc9057e6641821a38c01b67c1e7d59467e349ff9a08782e9b7ed7a823234f1. 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/NLC351519913.
Belgian Music for Alto Saxophone and Wind Band
Rhapsody for Alto Saxophone: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc5210115012cb95130917cf1da54686234d385d8a21d0ec3f869a6bfe101a3. 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/NLC351318303.
Rhapsody for Alto Saxophone: II. Calmato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635643fae8ae8a9244f731fb4531fb38c0e6d5eb1379d77b6da41fd9945cdb23. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:12:23Z), 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/NLC351318304.
Rhapsody for Alto Saxophone: III. Allegro Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6072b4dc46a696cac3443099193bc96ca25076a7a71f04c3ee66b51c8320e34a. 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/NLC351318305.
The Metrotones Live - Let's Fall in Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff91a58e4eba4faeae9b4e6edb5b504056af0ec0d5b46d57cdda08cde97e99e7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLC351017108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2154547c723dbad75b1db35bf07c320556e5eea9aa5042b7feb782760afdce. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLC351017112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05f51e3fd7aa64de5ce42c1c48c023ffe14a983dcac53b72b6cedec4189c5c5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC351017501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7f1a6b427c0d3eb84d2888534e527e533bd236404b12046768a788948e1c9a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLC351017504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a04fbe0e1a0ac584b99e7fc88ba822ce67a2cb1237e7259c945e7aec6a16e3. 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/NLC351017505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12e1655f4e9a2af17a443c10880ca4e95e485f7606a25c236ad09167636eb8c. 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/NOBWW0104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4249e9faf70d88482ae420fbdc4bb9f89d1d0aabc5494adc959f789e2400339. 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/NOBWW0104150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e501a940c535e3f9fa5518216a9e4fd1377be47bbc5ca9dd19689879ae654f4. 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/NOBWW0104230.