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 0x7e38782aad342797a246b93e119f2ff8eadeaeb3332a3d1926e1a58b78af44a8. 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/33c6bbcd-d65c-4b78-bf38-5901e4832ba8.json and https://artists.proofprofile.net/proofs/artist/33c6bbcd-d65c-4b78-bf38-5901e4832ba8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter" (Arr. Ø. Baadsvik for Tuba & Orchestra): II. Largo
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 0xed95b13162ca462e4e22554dd7effed2f36da89f2ff8b3303dead205440adc65. 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/SEAEM0385030.
Csardas (Arr. Ø. Baddsvik for Tuba & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5675136bf017783f2c73ca9943523d6e65ce7601ec868d7c8501ecd61499d69. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SEAEM0385130.
Carnival of Venice (Arr. A. Baddsvik for Tuba & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53214f8c4d0162d0db0cba6506c269022e55192eaf01a13456fa3f6ca76feb7b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SEAEM0385120.
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
The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter" (Arr. Ø. Baadsvik for Tuba & Orchestra): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb1546b76ad314eecc3941d76709f6c11dea96a2c7582d8fea10872c8a2db3b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/SEAEM0385020.
The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter" (Arr. Ø. Baadsvik for Tuba & Orchestra): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad316ad6ea6af3b5a19321a691dc91d4a7221cbdfad777e0717f3b174371f1b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SEAEM0385040.
Peer Gynt, Op. 23: Anitra's Dance (Arr. Ø. Baadsvik for Tuba & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b045d5e49b6932206be038928c89a0ef3aa7486f58a0b2d34b96c51cbb4cea3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEAEM0385050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3bfde86a4c3c5f3ecfec0a4c81ce3fe5ef0ea8ce7c726c1b5785263bb805f5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEAEM0385060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78100763c3132ee7e4a643a2bef6d69f4c8783916de973f0bb4625b87e9e164c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEAEM0385070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c237dc6436aedd6b7bc56a5a3758a8c7926b3c885efa2cd632b4b4825fe26cb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEAEM0385080.
4 Norwegian Dances, Op. 35: No. 1, Allegro marcato (Arr. Ø. Baadsvik for Tuba & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac02f90475b4cae93dc660a5fc84ae92c218bcd86d85dc61fec2439c91e110d5. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/SEAEM0385090.
Kesh Jig (Arr. S. Lundén-Welden for Tuba & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e6d561899d80db86d5996902358a27ecda4723cfadd38330c9a9b84070983b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEAEM0385100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b7032d1efa909e229e9a023d06e23b1b3bb4cfe221e089ef366b7162a2f659. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SEAEM0385110.