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 0x684131c54a4ce04f0f470ca072b892d59d33911967bd1aa38ac6990be7efecb0. 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/f9f0545d-5550-475d-94b5-6db21b8ff02e.json and https://artists.proofprofile.net/proofs/artist/f9f0545d-5550-475d-94b5-6db21b8ff02e.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 0x21695cf5a2e9c88ee482ecd20961787d62a8c3e93241c1b537609f1c4946d332. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:24:06Z), 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/FR8V42300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6257acf8a26bd9782d323018010e1bb80100e4499ea2b9a77f3abc66803d985b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR8V42300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24904417f5e9298d5f0ac799e4a9814fccdb46343f94d8fb1098d5733b92ef3c. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/FR8V42300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e67955ed2aaf00475e3774ef1abf0bf94518f8cc8416302403dcba593426c01. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR8V42400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9c1b85a36bf5f6ff4912250ab55e3f74d9ad6882d0f1957380d8d51808b57b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:21:37Z), 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/FR8V42300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc563f6fe995670a10f551a04c8463d980546a975ed06966a1fb1b1976a0ee94a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR8V42400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206cd285827c668d69281dc1cdf9464a4cab020149b410b7bd967a770b0b637a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:42Z), 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/FR8V42300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c91641f94029a93355898e5a6078f0a72be0c440e23b9824250a0c56d57396. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR8V42400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfa3ff186959080cb9c6fbd28d8c995180a3a6c8670b70e06b315e7d0f3556c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:01:34Z), 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/FR8V42400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442a7e240267b92edf3c7b2617850fe9a4af83b34ad2c0f470770a89d6d54a8c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FR8V42400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6330118d3ef173aec9a460ae376f1e72193625a2f282885f86616a0fde7cf58. 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/FR8V42400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afb14e8e003647439649aee970f9823299b9591174c270fe138147d7ab16c0c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR8V42400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd019671c49330df506a28fa89e07334bf62cc41b397efa3853e56c76615db796. 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/FR8V42400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16237b06e5449ca7f2d91bacdad553c1f7a48f0a805e6b4c9a831169ee4abee5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR8V42400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c7362cf9be14032b978ec987b2562c6f6168c3f493e2be67de0287dae8762d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR8V42400056.