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 0xae068ed5c5f21d032666601bca5a75cce24e8fd1f41be8ac559f0417641bfea0. 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/6cf778cb-ae6b-4ddf-9311-c3a58760deb7.json and https://artists.proofprofile.net/proofs/artist/6cf778cb-ae6b-4ddf-9311-c3a58760deb7.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 0x9b7f0a9c0688030dea4d00cdd970ee3cd6c43b28d34ae5f42fa0a4cf8f1d488c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAEL1999640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2218ca3fb04f04d225e72e0ff9d3a224d569a34d0d59b8c61ad335eb6da6ce. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAES2062349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcd4df3908bc15feafe92b5bd7683f12d33c9e6e55af4d92e2271cd9781c438. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEH742033346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe76cea78d0cb6ff49fcc99c7d10c291f56a4de09dee62edd7186df7b2786de0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEH742033348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b77bdf0aa16f3e6a0a1d8c03feb3e6b16d0e6fd430608a6e03239ed47e63f0. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAFA2016341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9f1fbbddd4eaa511bae601b62b0d224cab182c10ce1f63728fe332e19dd8af. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:43Z), 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/US83Z2132563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3218a2b0f89bf624d15cfdf86e6099980dd32472de1ecdcdb32f528af59cfc01. 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/US83Z2132564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa047eb6d54115d1b9593b8b4db5c9f9a97392aa2aced0c0dbc45f71b15bd75. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/US83Z2134240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efbecbe11f0692d236c59194a3b90b945bae8d7b95f865fdf1416b86da31c15. 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/US83Z2203175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6936e1c087debd8559a3e9f00a3f66733c2a6e4bdd9bd0c43bd2563ae9b0bc. 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/TCAGE2256037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ac8ddeb31184d1f06c1c8fd52b09d1436c8d62ac638a3e60f56157c35b6bc7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US83Z2221624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b21020776a189766092c4630099bcbd18e90eeb44342f85510d2a8fe849170f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2221625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340d72a9ca4347666d7d3350e85712d73f4b066c43b80365469089f0ba8b0bee. 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/TCAGL2247076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c18035cb0525a01df340e79a709964a96f7d143d3e8ae40798ac8f7e791383. 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/US83Z2319442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37c71602cdace7346ab9b057ffbe6a970cf3d764f8d8079d21e0c08b44bbf54. 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/NLZ542400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92532f9cf7e579304abf1bb30b63711b5eb30ad98bf8bbdda8a2e049f7ea69aa. 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/DGA0R2411232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f68adb1e01572f6ec651ffc7f1423fd21b81763cdd91e0e4a7de9e859351720. 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/US83Z2132565.