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 0x0ef577169fff94e0f4be58555dcf5a4249b8d61038fd87ea3ff542d494e2af4d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65003050-ebe2-4ee0-ad95-540531eb6a37.json and https://artists.proofprofile.net/proofs/artist/65003050-ebe2-4ee0-ad95-540531eb6a37.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 0xcb797506133815ea5fb517490d23d10c7b4da50c7e09d2987da9a487d1c6601e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:52:11Z), 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/QZHN72419771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375a1e61e776ca9b6f947f276db694a354806c5a8d1203446ee3562a39d791da. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZHN72419775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acf28009c68b902a84dcefac8076bb463443c327d76d04f51c7c50fa9d3f6fb. 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/QZHN92433198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1ae3dc52fd1b100e8cdf8037b9706aed401e117348c60c97c8eeca351a3be8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92433201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa140aae005c1425e0b93605ea714f64ddb8d46721b1d34552faf66d56d08061e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN92433202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d9980c86d7fd0156c1f4a9ad3d306d81ed4090fb1d5e6656c32f97702931a5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNA2466295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf467bd99543e06730c2f4430502a327b6874b3f98a37b9a0a203574932eb23c6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNA2466301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555cc795c374218d900f2be2a14bcbb1eb500f8a9bc94269ed2ccc145b7da31. 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/QZHNA2466304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358a6068de0afaf4ef3bf93c5b5b60336f67605b85cdd50630d6a22133bff69c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6Q2440158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8a6d5021b65a77ad7726d3eba3dc23409bb481e3b59900273e7149b50bd021. 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/QZK6M2413723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3d928df0ee348e844ed9cd816b6baccbf5ecbbb75cc059afaa6115ff36195a. 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/QZK6M2413725.