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 0x106dd147d143ef8ed42f56fd8e817c9b0a47ea06e6b2b1d6843cbd4e3c623472. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8a263d1-a65d-4e55-8d6a-619eaee72f0f.json and https://artists.proofprofile.net/proofs/artist/f8a263d1-a65d-4e55-8d6a-619eaee72f0f.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 0xf359c48a0f801629922168b36cf53cb3250fbdc7ef97ded1b8dcee080d0688c8. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ITJ150900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b49066d5e1b41d7d7c442588dd117f9f2196597603a39d7cd67649f14a93c69. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ITJ151000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c86d766c4567f3733a8f1de36b4f8e93f154bdf5834dfd7a5873a6f7f3ce271. 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/ITJ151000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7a5662f06a207a958ba2160dc2577e6920bc90c17aee6c913f3612929ece48. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:37Z), 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/ITJ151100444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6564bd7b367f5bdc0579f757bf9bf7f6e7abb8f93894b7dba8fb2b28a933bc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:05Z), 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/ITJ151200466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642dde73cb1b58b60ff6d296a14fee187ade2e3e89a9d40bbcb3cac60d64f364. 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/ITJ151200478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642dde73cb1b58b60ff6d296a14fee187ade2e3e89a9d40bbcb3cac60d64f364. 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/ITJ151200478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866a0dec86c3afbbc5ce752be5b121cd316995e6d9ecc8aaa1779eb80a7f37d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711303508.