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 0x492781aeb1641bcae98d7c9b4b844dae3c4961bfdb12358c4ce6cf759ad769bb. 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/c1863a28-af56-472d-bf8f-16498e4d5121.json and https://artists.proofprofile.net/proofs/artist/c1863a28-af56-472d-bf8f-16498e4d5121.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 0x1f9246a579624c957767ada629ca4bde09dbce764cf3bc7db999c2888f3c8e81. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNC2347747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98756a880919e03e22d641869fc2f9e64c4098e4241ec1e5390363702eaba69. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6P2334799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd524e5a6b353a42cbcd52abae0a47d4fed76959ee9aeabf88f320f75fc0ed9d8. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZK6L2306935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc7b9bc0ea69552126a80c829f754a07eab8fedf0ab9968bd1e34793656c7bb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6J2316674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405ae4d495fede7199815ddd8ec2ea08a6932f25f76a16d6f5638b47d3e3b59c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6J2312415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8d12f3f6fd26a40f1fd946a132d077508a1b2dcbed4d023a57de3625b14d75. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTAZ2373901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb457fb57aab1fa68ed89087af615eeb980afe5ca587a304d4a9580ce3ed87b69. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES72446568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19b55e6bc46c1520350b893b45cfb9957284ab39aba3a327ccae606787c7b45. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHN82428962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ac3988b7e34e1d5258c2399ecb32b7d96ed16b9165644ebba8a43297a52b90. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6L2496897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a72cc2693e7c0bc213e15c8d04f386e31341242559fd919907c8f98e91daab. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6K2456917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5e551c72c0a5001de158d0cb32650b346a130ce58d5c7387f89942d708b285. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6J2456128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c00cb2eef2e03c5aa35c1d584e6c4eb930564c76e6b1bb8c5d7061c8ddbdbec. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEQ2412029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeba5a586eef8edb8e4fd252e61bb97819ffc585321a4e69a4353e07a3725550. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNWS2463969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a468bcf39dbeebc204e1a56b2ae6e7aa56d05a76deab74c208711c29d9e890. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZNWT2449619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015819bd5766f45524c31fa77448cba26ac9068a9abf93630320a06df50d8021. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNWT2443942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c3ea3f2f2f8b79fcbc9414735783ef25174e078bcc0a0ea6199a29a6ec754c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWV2488606.