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 0x9f5bf56a0cde9150e852cdc7934356cf8daaad4dade40e6157cfb7e82e066b12. 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/aa23f24e-3a1e-4191-b61d-a7c873ac4069.json and https://artists.proofprofile.net/proofs/artist/aa23f24e-3a1e-4191-b61d-a7c873ac4069.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x13c6aa52579ddc391656043f15bf87295129d914c4d6b99576701d75525782bb. 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/AUAB00350060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8c9487081d40e4992e92a084120bd6360af59c745a5bee91c41a2b59ea6528. 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/AUAB00350062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9398946c6fc50d6e126003da47a6476e65600283dcedd9bbef2e77edb8312750. 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/AUAB00350063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0816e3e4c4d3a4db9c838b344c2554c735475bf598f51de95f849d65a726f71c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/AUAB00350065.
Harpsichord Suite Set I No. 1 in A Major, HWV 246: 3. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bddea58a0855a4e0fb6b1ee0797184b685ae2f4e8630b11a6a5faa19aa8348. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/AUAB00350066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf208f516704fbba79b700cee2371f69e7487654b6befa1ac068306d01f6ae939. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AUAB00350073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f84314ed373a33a6028fbda2d3eaf5bb077f439ed0367040f3600a98053e7be. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUAB00350074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492765b89f7f9a29b404839ffeeb7b240db02e0757f16b1ac92134bd6fd14fb5. 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/AUAB00350075.
6 Piano Pieces, Op. 118: 2. Intermezzo in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8e8004abab147a8deb75b6c82ccc60584d11153793f419508a346fa44974b7. 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/AUAB00350076.
Variations on an Original Theme, Op. 36 "Enigma": Variation No. 9 "Nimrod"
Lest We Forget: The Music of Remembrance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0d3862126c24c61c49335705e790dace2ffcf824f39f92f97f3dc3451993a3. 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/AUAB00850294.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": 1. Adagio sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3486f15cd33434ff56479fb83812a2c46be80a8657c547a87f73d24c380d03. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUAB00550012.
Fantasia on Greensleeves (Arr. Ralph Greaves)
Colours of Spring: Classical Music to Brighten Your Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba10437ed1df656e6115465a87d5708268647779177c0b14757d52b343d6f09. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUAB00350054.
Advance Australia Fair (Arr. David Stanhope)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d610bf7ac7d714284151af010e638ff6200a6655a9e320d77c9ca3e8822fac. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AUAB09650291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319eeb6e43ac9344e8c58d5ec0fedff510b95ed9cdf2e083ea261cc37eaf0923. 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/AUAB00250015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87334cd38c1c25082bceb95d892551e162a42de9bf10adaa28af5720b1b70f4e. 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/AUAB00850302.