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 0xf9f554e6144646050ca9545da21ace3999383468bc26df7382afaa835ede52e1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e97eb8d3-4a92-4192-a4da-31b206ab5b79.json and https://artists.proofprofile.net/proofs/artist/e97eb8d3-4a92-4192-a4da-31b206ab5b79.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 0x470d436bc1d9765a95df2545fc600661a99a6767c038b4e9a142b159d3678f70. 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/QM6P42096726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102b31dc953a928f2f96c7b9fd033fa46d008fbd657a82a7cfe81a044cd0ea61. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ662316948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688fc3aab0d9f72600157dde91d26d3af8d84fb8bdb8ebd82ea56807a9837f73. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZYFZ2453657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b5f36441701ae200f64ddcc0aa940139a42d6b6c05d48ab9a178490b79893c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:23Z), 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/QZYFZ2473668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79d1c7a2ac1ea7c23301c8be131f6ba13d4528c38ca08408082c72df9c71ae1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZYFZ2492604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659de799c16c554b12d784db2af9538510b74bc82edf796aa0e99007b7365f66. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWDW2458874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a5e354c42e93cfb3f67fdfa0eb23d818c85303ad2de3480f5f9b71bb678f71. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZN882585356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bacb789ce52346ab9e3f2aab92a36ecf6dce0eea4b8afae5f404bab2306deb7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZYFZ2504035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5779bed3e47d46f2ba2158f25897b14566f3990b0f85c36924cc4917282a2518. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6P42309239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3bdfb32fb75c2e600755a9b6c34154f65223b5dc7d7b419b2ca68c7cc99925. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2036328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf55b922e17a943fd64f714febd51a04e7026a49ef15ea085fd13aad5113c8cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2075831.