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 0x66e73346172b512a4ce2b37f8fa0e4f3988c5be2dabee2e4548baaec413ba5bf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30fe4e56-0924-430c-942e-69a0a940aa4a.json and https://artists.proofprofile.net/proofs/artist/30fe4e56-0924-430c-942e-69a0a940aa4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Los Maestros de la Relajación, Vol. 3 (Debussy, Satie, Bach, Mozart, Chaikovski y Beethoven)
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 0x4ec726d5898481de783d545f2e38455924efda48e1826280b62057b8da052166. 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/USZDG0600622.
Divertimento en Re Mayor, KV 334: IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52d7aca2774a3cd3b3b3a1a676ead6134fd165091bac6ae861962ca4c471406. 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/USRDG0110655.
Sonata para Piano No. 14 en Do Sostenido Menor, Op. 27, No. 2: I. Adagio Sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418e123447c89cbaeb45c5cf6f980d1ed54558a1f95a13ce340888e4b810703f. 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/USRDG0111860.
Serenata para Cuerdas en Do Mayor, Op. 48: II. Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940fde65c9e15c91ccb6623bdd14cc887dea97c0ef6ccea69fed6445f3cd8408. 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/USRDG0114440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b30ca4acedafd5d1e4773fe2f7b51ef0721a561dca21df8a8082347d22af678. 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/USRDG0112418.
Concierto para Piano No. 9, "Jeunehomme" en Mi Bemol Mayor, KV 271
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53382dfd9f1cda5a2e327f852fa144aec3c1661b313356f0e10dfe52d4ad80fc. 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/USRDG0218010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db990233315036b6f11a9986b37b1eb4a8636e843c72d7de5ffdf1e95924340. 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/GBPS84289224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0a12460d3b94bd943ac7517a49d0983e589c135d89e086c89cd71730862a89. 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/GBPS84289230.