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 0x96c52118c8dda79a9ea15bd282766c6b01081ae3c4afb59dda3ee8750fcc74f7. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebfcffef-33a2-4be7-8155-919b40d5e53b.json and https://artists.proofprofile.net/proofs/artist/ebfcffef-33a2-4be7-8155-919b40d5e53b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trumpet Sonata in D Major, Z. 850: II. Adagio
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 0x7e3512faed4d43e4b358a3c63e10d23c065b68fac148e19d1b0f0d2b2b14a8ef. 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/DEB261801022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be9d5d05dfb3cc36235ed8b71ff2fe28f9d4c86aacd7110ea6698992835dc83. 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/FRZ141435140.
Piano Concerto No. 2 Op. 102 in F Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb699af5a2a0e6f48c89318e6fea3134c57748d489603dec7a0d7acd43e7ac34d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ141106010.
Piano Concerto No. 2 Op. 102 in F Major: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ef8e5a36e5a9e9cfaa05b55135be7628a2d2aa2ead5bcc5c0913c6a441ffd9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRZ141106020.
Piano Concerto No. 2 Op. 102 in F Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5c1f658d1bdab67e77737eba80815463dcd901986ae230a5846025707082b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRZ141106030.
Sonata for violon and piano Op. 134 in F Major: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e94967d339c097ac417e9a539db7ebeb53255f9418d60eea23d7645b6dd4f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ141106040.
Sonata for violon and piano Op. 134 in F Major: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69285acda852adcb94b6c52053fd4fe1a74bea1c600d5ce5b01c024283de6a8d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ141106050.
Sonata for violon and piano Op. 134 in F Major: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1457b64bcf5f12d24bf1e0a6a0faf9f87c4ccea467b4d6a22a7814e326beb47b. 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/FRZ141106060.
Concerto for Piano, Trumpet and String orchestra Op. 35 in C Minor: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e7d5e292a59f3a2ab6e035b69afb678cd8f5813d6da7ce5e8b7a2e1440aab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ141106070.
Concerto for Piano, Trumpet and String orchestra Op. 35 in C Minor: II. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445fb69f417a8b9000557d094eb89a385bada77546d12e234e491da11c61558. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ141106080.
Concerto for Piano, Trumpet and String orchestra Op. 35 in C Minor: III. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f1e00decb94480302072fa6555e88966c3b660ba55ae27b6882343498e990a. 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/FRZ141106090.
Concerto for Piano, Trumpet and String orchestra Op. 35 in C Minor: IV. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1326988746047994f4d64ac60b1f08e7b35f1fed52dd1f63fd58ace5e88e63. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ141106100.
Baroque Trumpet Gala - Biber, H.I.F. Von / Telemann, G.P. / Handel, G.F. / Vivaldi, A. / Endler, J.S. / Stolzel, G.H.
Concerto for 2 Trumpets in C Major, RV 537: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a467c86eec88be51a6f53a636a8644990ea7158b953d4bc9cc3d2bda6aa0d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DES380610007.
Concerto grosso a 4 chori in D Major: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8646a9f6c47bf7be39edd2b49e318cace07bd6334891118d7f2a94d7810212. 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/US37B0601698.
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
Biber, Telemann, Handel, Vivaldi, Endler, & Stolzel: Baroque Trumpet Gala
Toshio Hosokawa: Orchestral Works, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7cd28537bdb20cda2c029fd1336f34a0242eeb1a5fb23035a32ab98d4ecd58. 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/HKI192307501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebc7681594a275cc29777c5061fdcb81a3674586770779afa0ac39444a2928d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HKI192307502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68b23fdf1b2599c356e813911f929d64f3c7af8a7c1dfd597a28bd1e586bfcf. 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/SE6QE2160137.
Konzert in f-moll, Op. 18 - Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6048814e808eb9cc783055117d315c6861e7653802db18d79809e8bd781d074. 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/SE6QE2160141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4f96af0c1496366cfc0552c7bf96c5fb89800dd2a7f86fdff49f0f663c63ee. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/SE6QE2160136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb3a4fad035f06fb72204bab42de052fc08df08159b0889b81a2dc1209d6dc6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE6QE2160139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947a9011b64528fb8181bd3916dfcbacaa3b8320fa0815a774d8c73b536bf963. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE6QE2160144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34318ea3ffde0cbc90064a526ad80fd8c5920c630a5fc9d9dc00f4fd03b141c0. 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/DEE219772501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18821cd6c7d1c68a756b01214b3166eba97c99fc0f128bd75b985ccdf79f3c0f. 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/DEE219772503.
Sometimes I Feel Like a Motherless Child
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84abc6f5a8f30f711f88eb370f761382f1d9501320c7057f33eb5529bd2c74d7. 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/DEE219772505.
Sacrae Symphoniae: Canzon per sonar primi toni a 8, Ch. 170
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc7370a1cc58fc73b3740f78f2b60d41737884c5c148b76e2dd68a3e8e4446a. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/DEE219772504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e4a220dc035678b513d6e1d8e1893e6e67a28963df5d766f6a6508c087597d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEE219772513.