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 0xc783bb3881332dae631a75602ce7ee4127f8aa196c85a02ba0a11b18b746cef3. 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/f40869b2-72aa-4518-b7ca-9389a69f5878.json and https://artists.proofprofile.net/proofs/artist/f40869b2-72aa-4518-b7ca-9389a69f5878.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 0x56913c7015bad3c86ac54ff8cf332948c6cb08bc2f559c805d3521558c414caf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ZACN41801207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ee80e8513a87141f7f4bbc5e4d60db5b949e220e1f7ccf9f03b8e45cdf5ee5. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ZACN41801209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca9af73904007987287e977dda881b1bfdfe14f1a718be873359fc8293cd2a8. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:03:01Z), 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/ZACN41801211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd700d542034e15c80a9fd93b54f8e5bb72f727b003218b9cb775d4659fc296bb. 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/ZACN42001459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff4617a63f77d3fca67f4d0802fd21d19de84d5942379d52470267f52b9391a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ZAUM72100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b72147ac87e95a902aabc3c43347aa8b817bbcc71e26ae5056a0fa4fa638faa. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ZAUM72100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43af512bad00f7704f8dc2501e57ac10d6615ce29c80704703acfe66b3838fcc. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:33Z), 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/ZAUM72100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd417aeb1a83b0bcefbdb914e49cea6fcc4220ea77164c88a4b840bc66fef6896. 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/ZAUM72100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d76785eab08519baf7c8ea88c57ebcafe419fca093433b244837423cb0899d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ZAUM72100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c1d6510940fcc6813d598209fc86c64919e3b4ddb735d09c3d58af3795e799. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZACN41901259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c1d6510940fcc6813d598209fc86c64919e3b4ddb735d09c3d58af3795e799. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZACN41901259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4897b25b1b0096a56060a26e806a308d2cca4bfcfba13c29ce7ff4f2daaf7188. 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/ZAUM72202499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a13d66ed881360f4585e0a6e74b1eecc4670242a15968f515b7ddafb2d77584. 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/TCAIQ2439999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d4e030be15fbe2c4ca25d7e185d8419658340db4d99457523230bba6db3ca2. 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/ZAUM72202031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb59bd4d34d695676da441c6ed3f721365345e2910f97c18103355df46500385. 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/ZACN41901402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb59bd4d34d695676da441c6ed3f721365345e2910f97c18103355df46500385. 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/ZACN41901402.