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 0x725d0cdee068b082c0bcd9a37e2627ca7a95f37e904de7be81a5573bd97516c1. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed0c8441-ddb1-484b-927c-28b19644331f.json and https://artists.proofprofile.net/proofs/artist/ed0c8441-ddb1-484b-927c-28b19644331f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Movie Tunes That Should (not) Be Played on a Tuba
You Got a Friend in Me (From 'Toy Story')
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 0xcb0101217d00cccbe767a15f1506dc40c7e1811b5d4eb00b7a998f5afcc58429. 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/NLHR52101234.
March: This Is the Day (Euphonium, Cimbasso & Tuba Cover)
Wings of Freedom, Swallowed by Greed (Trumpet, Baritone Horn, Euphonium & Tuba Multi-Track)
For My Family - Lullaby (Baritone Horn Solo)
Quick March: Simoraine (Baritone Horn, Euphonium & Tuba Multi-Track)
Tuba Players at Sunday School (Baritone Horn, Euphonium, Cimbasso & Tuba Multi-Tracks)
Grainger: Lincolnshire Posy (Baritone Horn, Euphonium & Tuba Multi-Tracks)
Jubilee! (Baritone Horn, Euphonium & Tuba Multi-Track)
Battle Royal (Euphonium & Tuba Multi-Track)
Songs by Gowans & Larsson (Baritone Horn & Euphonium Multi-Tracks)
Songs of Encouragement, Vol. II (Baritone Horn, Euphonium & Tuba Multi-Track)
Annie Laurie - Baritone Horn & Tuba Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8321342e3fd74ef1413396d3be42cff4dcbd2817121d5293ee529517fe7377. 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/NLHR52100218.
Euphonic Gaming, Vol. 1 (Low Brass Covers)
A Christmas Celebration (Low Brass Cover)
Music Friends, Spectacular Low Brass Covers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01be3831eed899bfaa110fad14dd4b8f5f9a065655fcb01529aa43c6d0fd1cac. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLHR52143324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4e5d13cc0212b0d81fabc450f6737e1fd9922d02b87a51dde3ad646e86abf0. 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/NLHR52143327.
Fresh Start, Beautiful and Cheerful Hymn Tunes Jorijn Van Hese & Friends (Low Brass: Baritone Horn, Euphonium, Tuba & Piano Covers)