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 0x38b4c0b7da985d8893d977c119af60570d81bd8c886730ad7140ccb7c8cf5d8c. 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/8ef6e95e-5d2d-4477-a5db-6acba61c4f2e.json and https://artists.proofprofile.net/proofs/artist/8ef6e95e-5d2d-4477-a5db-6acba61c4f2e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e673cdf2c8f1329ed656a3318f460b3474691f729d7728b4b9b92c9170ac4a. 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/CA5KR2317512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a487884b716fd4fc6b700b92afc0c00a897e3f0250b924f3c8e4b38dfa2981. 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/QZHCR2100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f081eceffc3dc3fcc2f952685ef3c262482b786f10015216ec373e76fb0f38b. 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/QZHCR2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9c5e52a4b9d7b449a339f91d93c8f9f8bc1c379c90c0de00118fb58dea7264. 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/QZHCR2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277a87fc399b86858834ad7babd75a949a4a1d179c05a3e0b5fad61c66a1dcc. 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/CA5KR2474614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df6a37f419805249cb02422bf0833fea7d3dcb0ed9d7f925ed93fa0d8d14ce4. 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/CA5KR2474615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62814e485963d8d9796b195626fd5f406757e4e2c3d71db7bfeece28f202fb3. 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/QZHCR2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc30bbbaea7889527a5e19a7f961895c2c42f5109edfedbf883380ebd2aeb954. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2463333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786921bb947275446d40ccb123c695a1bbc7b6a182e0e1b2191f1261318730e3. 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/CA5KR2436330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f57186765eaaa50b77625553f0cec16e3917c8f76d57e0b2fcdf4ef3422089. 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/CA5KR2463334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367db417109b206e84353492f51fd2dae233c9c70cf0e01477e6aa6cf0a23bff. 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/CA5KR2410327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c23d7da64ac25a5bc762f9daa630dda6e2adc8b6acbdff75d96d96ac7361b. 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/CA5KR2456673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd035608f98483255977b240ac06488c9a80fcc344f4b1a2e2f92ea27d0fe6469. 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/CA5KR2452222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba872fe6eba9bf77d7dbb52f584faee40605668daaa832efee1673b9fc62a6b. 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/CA5KR2445728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786921bb947275446d40ccb123c695a1bbc7b6a182e0e1b2191f1261318730e3. 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/CA5KR2436330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786921bb947275446d40ccb123c695a1bbc7b6a182e0e1b2191f1261318730e3. 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/CA5KR2436330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367db417109b206e84353492f51fd2dae233c9c70cf0e01477e6aa6cf0a23bff. 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/CA5KR2410327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367db417109b206e84353492f51fd2dae233c9c70cf0e01477e6aa6cf0a23bff. 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/CA5KR2410327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c351317c2bad710bb330eb0880ca8490c8aff698eeca80db47f6b90911b315e. 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/CA5KR2404276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4571da9e6f1c451e934fd742c609f76559d322977fd8e2a3a93ac2d402b12a88. 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/CA5KR2397184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25e814f867f2612ae2b17806b362444820c194bc14859eb6d1e453604997bab. 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/CA5KR2397185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0041c6458a99b912a7a53ca2233fc8eeac2addc219b51a2048f3ccd05e79c730. 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/CA5KR2397188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5d66acdc34de0dc3c38fb8dba168fc4cf5f4d8061d9f276d642bcff9377197. 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/QZHCR2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d50b0038aae8f433a2c3d05c00e4ef54fbab94e5d51e945beb49fcd35410caf. 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/CA5KR2330459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32501546d9f7b88ae3c74c4ad580726792966449d53edcadbb79330b49388ed. 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/CA5KR2330460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100ee9076d797a1542dadb938c24fb4f78ac89faf74e3794e9430a4487e9724f. 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/CA5KR2330461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23523b0c249c0d4cd4bc90353e66ea9533ddf280e4b47a238045c3a797e1b03. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2299899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f28d0e1bb8fab7bd1388c08bcea9cdaccae8ee0ece467a1ac5149d574cc1ed5. 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/CA5KR2258597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4231cbc24db3883e12c95c7ea04d061ddae478b0fc0263691a9a7dee43ac83f0. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CA5KR2258598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d8a9bbacc57cf06b2fe1bb73a1b090e615872d70340662a6c38607e602ecda. 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/CA5KR0002827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227769cf185ddc942804da16f3bb2d2d31abfa84ff9d3a0b270e5f73d2c51f71. 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/QZHCR2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bf9ec4dbe429fbe0adc63551be740dbfe3ff312e699afb8783c3637bca3bf8. 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/QZHCR2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305c8d205c85385eb9eed2e85328aa325c5e866331eb731849380db2a613c52b. 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/UKG2P2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656971ffbe2353de4c3b32758ba7f546eb865733b2aa2345fbaf6e8346fc92a6. 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/USDM32002801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23523b0c249c0d4cd4bc90353e66ea9533ddf280e4b47a238045c3a797e1b03. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2299899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5d66acdc34de0dc3c38fb8dba168fc4cf5f4d8061d9f276d642bcff9377197. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHCR2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a7ce2a1de620978b059d719d8ebe631e63c7ed8972f85fea02dd7ea9ee0d2. 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/CA5KR1807226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb562f9d85e9ff9953be9399456b5f2efa412c36cec64d113b224ee5cdd7f4084. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLQ21680062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e673cdf2c8f1329ed656a3318f460b3474691f729d7728b4b9b92c9170ac4a. 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/CA5KR2317512.