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 0x59e8fbad02f206b8f8c10500ca507084181bd2d616bc576ea6c1149a5f7712e9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9be0850c-c424-4f70-a2ab-9817d58d7aed.json and https://artists.proofprofile.net/proofs/artist/9be0850c-c424-4f70-a2ab-9817d58d7aed.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 0xac0335aa5aea28f2eae4785fd00b89c78e0498f18a440323500a2196c4043f68. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM22594390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd8a7c987da9b299d9983e799db79a25246b9e15984c0d5f926cdc19790bdc0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM22594396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f311f5f2602610819cdcc23905536dbe5b238a8c269ee6a21e6eada33cdffd5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM22594403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ac9a0046fe4574c46f165fc528e15af7b8d0bc75f52e8faa3858b5e732413a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:35:17Z), 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/USHM22594411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf7be6fc547f7d5a2b7d6d8e43654242c0a0c7b337b3fba3fb6d8e2e95a5f01. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USHM22594412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cb2a42daa085d2b38974cdaf69bff249428d60ed86de1bbce86becb0eefabe. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM22594413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c0077480b63cf765d62cabbf70ac49e45eccc22a2c0bcb15fceaf777968bdb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM22594423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c7dce7bf46af0ed2391ac608b3f0ea5e2b58e565f10a9eb79a81d096b475d9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM22594432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903d7b26bbf690dbd0b8225c9115ad0ea2c5fbfd2ed06bd26bb20e5de869eea5. 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/USL4Q2561522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7372098e359a9ec5eb98d4ffed04a2165a3911048dacb28253cb2835c1609ef0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USL4Q2561530.