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 0x5585cf7464f78946d17cd449789a2aed71460437faa640358ea23277637a9c25. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f81b27b9-413e-4bf5-baf8-df2884bf5258.json and https://artists.proofprofile.net/proofs/artist/f81b27b9-413e-4bf5-baf8-df2884bf5258.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 0xbfeed9677bf5446f779b2386348618dfa63ab5b75fb2947235ad374b5872a0ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBD2307691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b29508fa9bc987ef20928dabc65d309837e1feeb1084998dfe84844cd2366f1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBD2307696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe283027817d2187fcaf673ca51b690c6d528fa88f14181f6514370686727a3fa. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFR2304396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da8a1c62cd42bdc9e8f5a600197712a800d4d5c644db9f226abc9ea782b75ed. 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/QZK6P2553542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fff6d2e43475f1ff7f2ba9d499a62c8f2e35128ff76696ef2ea7b98e4fdffcf. 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/QZK6P2553543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801a7fc479916bcae1ca93f26c0c7b68d28397707dd4c2283a63fca59b5edfdf. 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/QZK6P2553544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb416bd96ac463bd92b7f1b5cf1578d2578687a6ad2c727ed8c9e0c7439dde40d. 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/QZK6P2553545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3346ecc4abd928c81d56fcec2b5fa4381689a7f910965f61ec32ff3b7f7881f8. 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/QZK6P2553546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d38067d20afac37369d0c4a099e04d8bb61af89533e39a0817d1186d09458fa. 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/QZK6P2553547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ce95ce24b7d8e23af37074667a4903cd1c2bae5fd250d97b67fb3b82b3d28c. 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/QZK6P2553548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87468ab2dcc71dbfa8f9e13bdc9488f732424484694f668027ca90c6787d8f74. 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/QZK6P2553549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2532ed2f0f4b6718f40261c857e3c46e856c92b6eadfad14def2863d493ae2. 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/QZK6P2553550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7c687a5049f814a1ba009917d2edf066e7790901f61e842e1855ebae99f8d3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6P2553551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad0fe5a5a35a38191f2fa5e70d4c3faa4600e7e9ae6aa5526e046d0ae970549. 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/QZK6P2553552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abd0a9641ca527781008fc68427a8c3d2ce64f44314b8d9731bcf01909d796a. 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/QZK6P2553553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e0a5405fd22fff419fb55136570474c9b7a3496874b78010dcf4385dc80208. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6P2553554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2652eefdadae5e1b4deb5d7d448feece5c1790280215a2820e22814a0f1bc9. 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/QZK6P2553555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aed7c7d6b6fcc21ee05f28ec50043209deac522130437989e379dde56360095. 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/QZK6P2553556.