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 0xccb2a357dfcf730bb1a13195bc6fccadeabec2b7e09d2b6310e2918fdd132d13. 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/e86a5860-8603-4688-a205-3b1f12819a98.json and https://artists.proofprofile.net/proofs/artist/e86a5860-8603-4688-a205-3b1f12819a98.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 0x67d5363998476a23d983c8ba7f74017038fc22aa3190376caa8ee728f2a5944c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM81933306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb6494d5557ecd395912f5330ba761da7b8edcc270c577dbfce69fbfcf1bf9. 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/USHM81933307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902322df7c0f225136a685c20e53ee42f2f01fdce279a8daf7d7157d4c95db9f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USHM81933308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb83e46f5189b94ee7940e4ab749be20b3e702cbdff8b21bba3b970da9ef254c. 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/USHM81933309.
Gnossienne No. 1 (Arr. Roland Dyens for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f533d20250e0735a9b3ff4961c1c7988da959c5584132bd90fe36eda9d7704. 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/USHM81933310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039336f08014b034679168fec337830abf1f6c4950521177584eed845b4e3b6. 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/USHM81933311.
Suite populaire bresilienne: I. Mazurka choro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49582540a65de5389ba313b5f1d017542db8ed14a76ff9068c468e43f3875dab. 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/USHM81933312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb019ad047bc089fbbd6a936fe10b5bf83875de28946318716428c2880e6c602. 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/USHM81933313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34ca3dd70486135490df45455dec0b952b676acf6dd1fd22817216ac7893289. 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/USHM81933314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2abcff029041af5850a26008b71c673c86e17ea0fd7d183686a27575ea5070. 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/USHM81933315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e878db2b2b6ad27420a5105a206ef617b7ff706bcb55b64fe6632ab36211a6. 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/USHM81933316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee3865c72d46827bc54c85b3f62292e788cddfedc8e789c758ad8c550246869. 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/USHM81933317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697d5cce9fc7f1d51e88761a6e7f22e267d74d092c379750d4378000590474f5. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USHM81933318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73df0e2d5bd858898bb642dcfbca40b7b94ce13624e359cbc9dffaf54d044b82. 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/USHM81933319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbcb9312da669f6e38bc8b877fea523427429ceb7696a3fbce3c21eaca216a4. 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/USHM81933320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5865b3b2b346ba4814472d325daf7660253de1c57091422cca072dabc674167b. 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/USHM81933321.
Suite Española, Op. 47: V. Asturias (Leyenda) [Arr. Konard Ragossnig for Guitar]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d3941bd53d0179e7d6c8f93dd0da0e3c321e858e7b879075f78eab8d1bdc64. 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/USHM81933322.