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 0x24eafbfec8b89f710215d346f8297661288ec8004ad701e4f2ec64eaf686e7a5. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8acf39b8-a4cd-4668-adef-f6f95b533f60.json and https://artists.proofprofile.net/proofs/artist/8acf39b8-a4cd-4668-adef-f6f95b533f60.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 0xc0d5a3c0b51e46fff12a6ddc08c680a1ff8f1428aafdbe101066eb61ef92dc90. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZTB32429095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4732701c12d014cf68dd6d401e884dc429a6d6d5eb6d021a188b6c3681c0421b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZTB42482514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd36c8924dde917037313f57b9a1983e0edd2bfd5c4b81405b0015e2ddc34219. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTBA2461220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bd45faee83dd649eb1a7c0b8602988b65cfd251cc75b19acf4f599dd8bcd04. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFF2407026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4087610b791f3436eebfc247a0396240875771d732ef87ebb81dd534b308aea8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZZ792432471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aff1bcd4347089fb396f672218c97d022ed0d23554792004277c94339f695e0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6N2581389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3873fda3b21ed2c5266d5f8ab0b56af0ca24d9728ce3ee277091ad39712c951c. 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/QZMEN2591226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f40765a526d6cadebb9e9be1e474cec9ee41f3d64ed61416eb43c308ef17d3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFV2579333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bd9f39415628b3e1a44a32a89400ebe4fe11d79fb214d4298b1ba2c67c09e8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:21:32Z), 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/QZZ7S2586478.