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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0101217d00cccbe767a15f1506dc40c7e1811b5d4eb00b7a998f5afcc58429. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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)
A.R.C. Centennial March - Baritone Horn, Euphonium, Cimbasso & Tuba Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeb89b579184fd0aa544d550d6d6a9d4b064872fecd831acf53ec8f14fa89e0. 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/NLHR52153005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80af831b095750e2c165458fc5340bb67d202fedbb235362869484ba4f3fa2f3. 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/NLHR52153006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3f59b8de6616a8d0fa0ab2fe603c4a2151d119986a9e7af87b63dce332dc1f. 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/NLHR52153008.
Keep in Step - Euphonium & Tuba Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ef15278824434c1b963b2fec87c21e632184671dad9acca827807c695ca9b. 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/NLHR52153009.
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)
Collection of Children's Songs, Mov. V, Jezus Houdt van Alle Kind'ren / We'll Shout Hallelujah - Baritone Horn, Euphonium & Tuba Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cce5222388d84bb38d2160f8c9f02e898354bd572f7c2405dca1ae8b3f45d9. 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/NLHR52106198.
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)
Burning, Burning - Euphonium & Tuba Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c613c3e10a6b121e6025607a389e8abd9ffc06b178354bad3dc06b431f0f4a8. 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/NLHR52100216.
There's Only One Flag for Me! - Euphonium Multi-Track and Percussion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3ca5d9f70aba42e54d800338c6c6bbc925a5f59fe7e9a745f8446c99648df7. 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/NLHR52080682.
Songs of Encouragement, Vol. II (Baritone Horn, Euphonium & Tuba Multi-Track)
Be Glad in the Lord - Baritone Horn Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd81f1ea65bed5f31214130d8bc15709bcdac7f309c96d1ad5fb9a74998b9a6. 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/NLHR52100214.
In Deeper Consecration - Baritone Horn Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9574387b9c53f353f33516b707c597e09dad35d8b7ec2925be978ce1c1d6a7. 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/NLHR52100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c613c3e10a6b121e6025607a389e8abd9ffc06b178354bad3dc06b431f0f4a8. 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/NLHR52100216.
Come, Comrades Dear - Euphonium Multi-Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8243633dc35b019d8cea10bbdff58691ca9e489c5e4c326cad0a8d979e80977. 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/NLHR52100217.
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)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290e2aa90c73fc3e123338782c7b037350bb3d6b2bc1550ab73e0838832e3152. 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/NLHR52132609.
Slider (from "Super Mario 64") - Euphonium Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6329269925ae1a7d74a61cb2679dc7df36df4514f4dc73078e35a4d89f4aa505. 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/NLHR52131209.
A Christmas Celebration (Low Brass Cover)
Music Friends, Spectacular Low Brass Covers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc517069bf80c0fca73c997a60f8ed0d78ec0580482705bfcb1e3d88e9d1157. 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/NLHR52124429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01be3831eed899bfaa110fad14dd4b8f5f9a065655fcb01529aa43c6d0fd1cac. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:11:25Z), 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4d184ce4dd7a61563133f0bab69638f990f386aa536d9b6203a979696df2ea. 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/NLHR52107675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3219835ccf23379e201ae6c5f65f8bc1a5170e0a90a5018ffff4337b3ab19ae8. 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/NLHR52112805.
Fresh Start, Beautiful and Cheerful Hymn Tunes Jorijn Van Hese & Friends (Low Brass: Baritone Horn, Euphonium, Tuba & Piano Covers)
Storm the Forts of Darkness (From: the 1928 Salvation Army Band Tune Book, Red One) - Euphonium & Tuba Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcde37fe21fd74a08c1897b5bd26351744b31476eaa354ee3bf13f096f6cc96. 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/NLHR52169407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77d3cdf1a0a2a65fd5548b5f6f02b20f9453ff0969faa1eb0bc65ca0aa405aa. 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/NLHR52147308.