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 0x78a1834ee158ad6c3b464a633beac02984b8c2d1f5cde4e961dfc4024ed68b10. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe88d9c0-17a4-43f6-95d1-8ac2eb151a3a.json and https://artists.proofprofile.net/proofs/artist/fe88d9c0-17a4-43f6-95d1-8ac2eb151a3a.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 0x2004ed273c1cfcbe9f8a42f737fd17a640d93e0683642824fd8b302b8bb4ca41. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/ITL841400869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57863f9be2db80c27f89ce7dd35e8b0a780acc518d388711555434ca8a375f7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITL841400932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fefe6335a615c5a72f19fa3e070b21e32235f0192eacd609b9e0c96d8f1854. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:42Z), 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/ITL841400933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c493d89ede17a0bd6e044d4e6a813a020436fdf99b449fba565203f30559cf4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ITL841400935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952ee076c017645ebc8bbb7b1c70d2970389212a1f5c52ce00cd4b84b0e0e5e9. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/ITL841400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e2c1786c42d4192981269744c27ebc82f9651dcf5ae8d1ad3380c0588c03ba. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/ITL841700806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620032b87f35885e4c17f098371f7161dd36aaacf69b8e4e19722697e753e245. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ITL841700646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5741d71ad881b2e16699e5b300d9490185a998621fa88e8c99e5f70e0611d1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITDU71400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc3dc070b687c03b84617062032fa622f0eac2b297b497a7e615d8abbb27496. 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/ITDU71400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd52220e3c92785bc8175abfe1e1a586b6b61adc3470e81601accd778e261e33. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:53:17Z), 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/ITDU71400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7df35376f4d91b64899159452bbe4bad174cf56d868f1a82e4c4daf672ec8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:01:46Z), 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/ITL842300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4633743368e0dd23f497d5d5b9351e9c943bb0b857ff96bc5329829a24b848. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITL842300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696ca12bc78656d2a2ca66fc1d35c4d321d9b16d3bead680ccb45105c4668c6f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:59:49Z), 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/ITL842300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cfb2a825ee6056c75356fd81fc7cf428c1d06f5f66803f0d7aacbe4a2b01ae. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITL842300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9b0a16d72249fb118ea6b9164dd5cc4d26de8b58d09eb114d1b95d4dc06654. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITL842300269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf21c1518a395be61f7f3c12b2d8edecb79dc78e05af5dd7ff44d8d41e0d071. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/ITL842300270.