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 0xbafacc3d44b30f5ac47fa4043e0e9ba19584b9765c7c35173e498678e6553cbf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4114fcc-8eed-41f1-8cc7-91e716cb27d1.json and https://artists.proofprofile.net/proofs/artist/d4114fcc-8eed-41f1-8cc7-91e716cb27d1.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 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 0x1a358e9efdc1e22e18796bd03d2b29f577314a73186387dcd671223ce2fb8c0f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862102299.
wind whispers, Op. 85: II. floating leaf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb10fa451584edd271d0d0f04a9e557220a0276a9370f3b889574a8fc90b25a3. 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/DEE862102300.
wind whispers, Op. 85: III. gliding albatross
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5afefdc492db6233cee95310e37cd2f444dd692497aa6503b4d5a8cabd81ec3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEE862102301.
wind whispers, Op. 85: IV. shimmering light
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9127c96895723ab497a0cb442a671ed7af0dd14db90d0b7cd3ee0458914cc316. 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/DEE862102302.
evening at the window II, Op. 75b: I. The yellow moon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef9167cbaf3e82a73a900cd2dcfeadfade633dc2e69ee26a92dcdbc3fdbaae3. 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/DEE862102304.
evening at the window II, Op. 75b: III. the Yellow moon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e47c4a6f344baf1f4d85df5188dbad531eb61068c1a16b86f6c9aea6b321ff0. 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/DEE862102306.
evening at the window II, Op. 75b: VI. in your arms
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173180f995bb97113de3eb076f3cb73e59b324a5234f484e0ec161327afa8b6a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862102309.
evening at the window II, Op. 75b: VII. The Yellow Moon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d52620a60de75aea3f88dbf303931e25ac7186e05773b09dfdfc0559449de. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862102310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60628d18664c81e86c42efbcd34d612ee622d997e8130de09e759a099516ec2e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862102317.
melodies from the sea, Op. 86: II. turtle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1a170ebcd0d90a0d651406b866e9b9e0529157882e44cd42fcdcfda8ccf577. 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/DEE862102320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0cafd1de3c8ee5604d3cfcecdc2fbbf8bf241774be0912ec06f8d3336404d0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEE862102323.
melodies from the sea, Op. 86: VI. reflections
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234085fba2622492247aaf6e66e46d5c867c2118e95111ccfbca4f78e8041c70. 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/DEE862102324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb10fa451584edd271d0d0f04a9e557220a0276a9370f3b889574a8fc90b25a3. 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/DEE862102300.
Hungarian Dances, WoO 1: I. Allegro molto
Classical Music Essentials - Best of Orchestral and Piano Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d6f87081f1a488ec194d4c1ff5d76824baca8595e9e5e91abfcb5423deb2d6. 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/DEE471500285.