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 0xd3e5928920ad775067b12ae14f8a40cd25976efdbe646c4785bd837710f5a074. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43e0b920-701c-44ea-8d3e-397dd349965b.json and https://artists.proofprofile.net/proofs/artist/43e0b920-701c-44ea-8d3e-397dd349965b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'homme armé. Musique de guerre et de paix, 1450-1650
Encina: Una sañosa porfía (No. 327 from Cancionero de Palacio)
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 0x460566f61580a3856debb4cc662b5d5c99c33429e8f355c6c7045ea596b8d6a0. 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/FRZ208402303.
Monteverdi: Ottavo libro de madrigali "Guerrieri et amorosi": No. 1, Altri canti d'amor, SV 146
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc37a9d93de0999cf3aa6752d46c47de1de4e60c0f14afeeac90e3b1292dc6c. 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/FRZ208402304.
Gabrieli, A: Concerti, Libro II: No. 66, Bataglia. "Sento, sent'un rumor"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de2bb8f790118784768e80f07939a36c6c8b8f6d1ca0f70aff42ae77359ba14. 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/FRZ208402305.
Schütz: Symphoniae sacrae I, Op. 6: No. 13, Fili mi, Absalon, SWV 269
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af880891c8dd51538efab906e2040865272f59c1789214fdc4b16293d522178. 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/FRZ208402309.
Rossi: Hashirim asher leSholomo: No. 16, Kaddish a 5. "Yitgadal veyitkadash"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf764eb6ebbd753789b733d3ac1bb0961cb2d5e9da7222c2f972e750c550e5d6. 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/FRZ208402314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130d8defc01ed23a7768bd7e866df6a7dd112cde5de8e1ca13cbc4e6712ba1a3. 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/DELJ81586175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380be111adf69bf35dd65c8c2f3373bb6b8ca119377f2851fd583313c6620dce. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DELJ81586166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56011fa1262535bbd813f9120777517cd5ad49f786740fe4a0e0413716034442. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DELJ81586172.
Susato Suite (Ed. Iveson): 1. La Mourisque
The World of the Philip Jones Brass Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2403f0f54527ee794447ca1d2fb8fe33fd7c5d6909b54ec42d63d1074ffef77. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBF077510371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf65f493337a864b856647057b7766c145f41db100cf8235eedd0727bae08403. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:27:27Z), 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/DELJ81586169.
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 0x0312c6d2270b8c29785ee563a173dd1fb68c608039e7f46bb7dc96ab48629e93. 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/DELJ81586155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d6f77dafaefd79900ebe8471c21445d5d152bde84d0ada13659df6a94b1168. 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/DELJ81586173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd197551ca0609d201fdca29ef8cdcaf0ed2dffb7cd36d5f6f7ba9ee73ed35c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DELJ81586164.
Susato Suite (Ed. Iveson): 4. Basse Danse Bergeret
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132c3c6415c121ada7336d90bb70851b170d12bf37b9622de47141e4c0b2b13e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBF077510374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516e227850597986189f9c68e462d54bb97050905a3e80b46227c3c328b3a250. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBF079143438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6748d49d629f0560d9819e5ea6a799c7a590e47de4f348fa5eec4a84ea65d56a. 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/FRZ177301011.
Music for Anne Boleyn: Court Music from Her Rise and Reign
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7c5aac40b869ba14e264ce667fbb1f44e55550d7c073258dddf00b419d66d6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CH6541631189.