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 0xfc01ca0f3e3a76d707187a5f928f379992e55b114c66a96bff634193ead1969d. 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/9625355e-2c1b-4057-8fdc-eb0db4dee57b.json and https://artists.proofprofile.net/proofs/artist/9625355e-2c1b-4057-8fdc-eb0db4dee57b.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 0x5ac59f203e19d6219d5e9739066d2eaad821c382fee49d8f57aabc06971acdfb. 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/FIK2Q2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17a8e949204fba72921c8069fc7726d15e9c2d91291a92d9bdc5f32feb50cbc. 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/FIK2Q2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518f32a4030629e0fa7f86452c910f288a77060734d6ff2e49156bab9d95d0f3. 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/FIK2Q2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86c44d910950bd442c9d100ec8a60215b267858598925132f744cabcd95a5e8. 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/FIBAR2200366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69971de239fb82df9c0b6267f8e04703833b5032682647cb58651292d8cbb92. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWR2507092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8110150b59ad1574d9ba7d6170cff57788950f6b2a9b53c1b45549a309420. 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/QZK6P2546465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59518a5b0f8f30b628d079b5979ec4d9cd955ba0c0497377536d0379f4c73b8c. 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/FIK2Q2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86c44d910950bd442c9d100ec8a60215b267858598925132f744cabcd95a5e8. 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/FIBAR2200366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3171e5443259cf1fff10b7bb89f29a0640a50ac8cff5181cf5b2622a94736c3. 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/FIUM72200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cacb1f8100092b69418fdb6b052ab15d86c084326ae0fa3b6f296ee1b96474. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FIK2Q2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d464d994e8167982f92b4c4018032fc86ddee65e7b0a0e2ed2767cc0d10c45. 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/FIKLW2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14660bf7952fbfc6a63bc098f0a5de32bf75d87c3fb3d2f1da439fb31f988fb. 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/FIKLW2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f7bd40c152b25fce4c0996eb70678d9242324d3103c491d7d3271923d578e. 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/FIK2Q2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6863e922179e8d26841665e273bcdca5f02d5afdc3c3a9037d390ee87d2c8541. 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/FIK2Q2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6fb2037d21bf9f1e55c8f63af82ad42dceeb5899fc8845224052d744588f22. 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/FIK2Q2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660393759c776a800bd4cc02b2f064e07803bba5e3d7d0696a73eabf0548472. 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/FIK2Q1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd3b58d7c5fb43a17da111ca7473532e49cfb20fee77cb831846cbc902fd9b1. 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/FIUM72200282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d602e8cdb548629ddf7e86dfd9d012c0432ddc7a120a5bfadb222ce5a1aec7f. 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/FIUM72200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0352021b71dd0d8ef68d6bf4faa05ed64f77c6bd8ac30668f3d391db557b0f4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FIUM72200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866bfff50f04e1c9c8b207e097c773240e40cad66c181cae342affef8ce5f2f4. 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/FIUM72200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9847768dcaece44a33721bffa638ef535df934733000f2be812644abd691d53d. 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/FIUM72200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808e76595c33b02fc205ec9f11fdb3792b4a4343b79a3fc9896dcf1a28c5f032. 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/FIUM72000444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346d46152a4aa21bb22903bc051d792d276fedcb55e1ca0f1dd53f88c65437e9. 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/QZES92587570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f54c86fe4a124325a6ad017aed00500ebb866bd81138e9dd54b58b058f7eb0. 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/FIK2Q2400053.