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 0x83cbcc2578de0c498e0f10acbaa3bf9e9b32f6c7572ccf39771736e00d12bca2. 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/b0744b95-4f69-4070-9dd6-e65ad7c3aee1.json and https://artists.proofprofile.net/proofs/artist/b0744b95-4f69-4070-9dd6-e65ad7c3aee1.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 0xf8daf101f407e970af9aa33fb1e4cc6bbbdd97909632e460fb2b0fd3997dcff4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/US3U80501037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fb6ee3cba2d5a66d8623222e04cb07a8716e767b16571cfb0485c8c7e9fea9. 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/US3U80501039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbebf0f40158a381b442edd1579dc568ec5f0516e0af63206c1b32f0dcbd4c1. 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/US3U80501043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337649511e108201a73ecf07b94feed6dc8771d8ad9768ca063490779b111b8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US3U80501047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037e6606114e40584d6513854793c6a07c36ec7daae57b931a926be6d717f520. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/US3U80501022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bef354d203241cd5bc6184ce574a018b8fd6651c1bf9a98137f6f3faf2d751. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/US3U80501023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b6fa26f9671072781ca43a6cba2c1006f90609c4b01ce51d916dd1d855051f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US3U80510126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df32c03d6291e2ac13306991261d358074aee0f27053821a50fc3a863a7f7d9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US3U80510128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fde854f52fa2c368c946d269c2387df03f1b7e20963255cfbc87ed226013cd5. 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/US3U80510133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e66a4d7c1a2554186c48f654249a352632029454266039474eba473945a0d47. 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/US3U80890140.