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 0x24d3cf5cc09f55aa0e1ed1b54573e565993663a78f49ab9bb417031c6038987a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e21937cf-b857-4a1f-87b8-4320994dbcd6.json and https://artists.proofprofile.net/proofs/artist/e21937cf-b857-4a1f-87b8-4320994dbcd6.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 0xca6bf190a105b410747d279c1b707fe9b690c89b50d1a8ab54454124998ad086. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA42436568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3356176fa03ff2d70eb69ca8596609332c8b886221909bd836c3b2a105e6c593. 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/QZTBE2328180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0bec700fab98aac12f8213b5ea5494fc0f2cc49d1a54294943875dec1c1236. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB42371353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4b64e567785699c8eefaeae212e210b7e6e9e4eb31a6e4e7caf43e54ce4c8d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES82419822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda628b4ab36e61c9478c536f61bfc475e6bc31c40d3bef46107560b98854071. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52460432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d7c2c37099fbceeb06b29cc5fcdbc039b9e041d440c8aa9310b7db4e631483. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFH2320989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0cf853001624e852a7dee80a9641f3b105c076165b15e656f61aac9c4eabfb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6L2495451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda33ca20e4236b91b78d22bff1de849cb7744e13d33487cceebfcf01aaf19136. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTB22387871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a881e37f91dc38a8254c643382b0d852ecb80f2739642ae02b77933402ff4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTB22387872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc388556d7324d9656e59a6857dc95043c9a013c3414e05d8eff77bbc6ac79671. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWU2457419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900e5dff6f9d285c52e30c1e098aaee9951e20f20b669a5725ca7b9cd812a3d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92323700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef85fb17278366487c6a0a3cc0496be46527f0d672b8e80a0cf29e8d6378f3f. 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/QZDA52233134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8187cf11e9c5732b4e32ffb64a0d405761cdbe966327e127efe4139691e4c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2092048.