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 0x0b8e837e9e8cb0d67cbe06801f9af1d3563ecf3f57366c4eda93250acd240b73. 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/0c07a556-6be0-475d-9e85-e08e084b2abb.json and https://artists.proofprofile.net/proofs/artist/0c07a556-6be0-475d-9e85-e08e084b2abb.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 0x2c2d698d226478b86e6bea321b2030b03e6d38fb4c555939542b951672b7fe32. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:51Z), 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/CAGOO2144920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7043774c807d40241fcaf60714c74853a64593417406e5c99a134aa16fda6fc0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAHQJ2350741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338e7b54974361f4ea107335df156beb7d19d097865f2f984f5576af78dceaad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAHQJ2468827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba61f87917cedd709db729cf17654fdf9ac156e768b8ea180276217e275517df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAHQJ2468833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253f2a586cfc081237390a59ffae5edd8cb69f1664901332b2533607d5e96dc6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:06Z), 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/CAHQJ2468837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63bc84f17fd5602f9e64b3138b6c97b21ddd8f2d1df46d63cb0e9da3c1e95b4. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/CBEYJ2409518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2f4237ca1881fea699bec12535b00bfdf985c8f0ac8df75a64fa62babe57db. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CBEYJ2409519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f68c94729d6dbd18b87c3840f9c579bb8fe085586d118105ffcddf020843669. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CBEYJ2409520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec569808110bc5bfa27eaedd6691a664bfa28a84e3e9833f71b86a1a5dbd544. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CBEYJ2409521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7848ff3f28b8ba3e81a9ba09aff43aee05465cf1bc74a3f1bb20d16cc4d439. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/CBEYJ2409523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dda7c1bf3a32ada51c20d82527fe3abaacb8af6d4430a987e93e7ecd5efc41. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAHQJ2550728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49846d3ffd8a03d7bba4f5aeea82cbac8fe4e13f2b0d9c531d3eacd7ed97fec. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:30:21Z), 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/CAHQJ2550730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d651794cbd53bd16d178dd8e8617cea6cdfccecfc1599fd5908060a857a8f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CAHQJ2550731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e0da784ba09bec040fb1da6c910f446f0326c331d25102320bd53e44ffca76. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CAHQJ2550732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703703b4879bb5decece07b4c42eef6c116e110a8ddac18c87e3cf2df5616315. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:28Z), 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/CAHQJ2550736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7768bb220583940c39eef81802dadb70db960f201a05732cfd22ad42d4e7ce3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CAENV2575875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8273bd27fddc89eec8bbeec5c43797ee41f87a8747ad2f9e2eebd13798c4a53. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CBEYJ2556332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d5ed580ad70aae7d8fb6180a463c3ec8bb76ba5066166adb8082d9c1550875. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:08Z), 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/CBEYJ2556333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07edaf8ab8fc1adf18d2fc0e45fcf97021abedd23506f4e90271727ba2e5a852. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CBEYJ2556334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549dcbb0f5f490bcc9e2503306836b55a916479667c545c18a3a6180baa9bc11. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:32:54Z), 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/CBEYJ2556335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb990b89b82feb6770b8aa136a7bb230fe4ea9da5c43bd6e14376bb84e8d42fb8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:05:27Z), 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/CBEYJ2556336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94f0bd884c944d6f2dca022698c621688e1e426fc285404622e35830d0f70d. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/CBEYJ2556337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b569bfad34435b8433c89e9b04b91d9e853cc3483c51bf33088bb7554af462. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CBEYJ2556339.