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 0x32b63f20b5db6982c232c66233d919233bc57514cf9812ab8527314078733364. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b6a84d3-1496-4f83-9ce6-8d55e38df5ee.json and https://artists.proofprofile.net/proofs/artist/7b6a84d3-1496-4f83-9ce6-8d55e38df5ee.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 0xfbe8f3702a9f2c62e4f28c767d52a4e3a5ca4597ff552f136eecbada18814739. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRS182160479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1994bb9e1189a6ee9c4cee3dfda9bcc3e9d2276d3f24fea6b5e84c87ad35b485. 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/FRS182160480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd285969391bf08fabe62db645e8a2d6022c1818a85e2eb19972d46dcd37ae47b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRS182160477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6a53aa5b2087e685f2b762a47042cfe64c725f60de1bbf70b918e5dd637395. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRS182160478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bacc9c5982a4bf695a3c559194af7e586eb9d47491f9d5de16bee4c971bdc41. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRS182160481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7fcc73a75a1338b3487a4ce430a1db513e5d5c7a9d1d888a1b62525cf3e16b. 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/FRS182160482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc823983c22b6c2c05c239c0d7fa2e76d77b87e1472691792e25b4841db289270. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FRS182160473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa799328b7d92c6f1eff049fcd6c97f7699e0d30c909a172e5f0c7ff05a8a1de6. 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/FRS182160474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92453f74f4fc81381be6f849f78f23e91a07b27895cbb45fe5b4a40d8a1b35ec. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRS182158507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46873695240e5de5da4c263a8fe4c0732c102dd67a00ad6d9d12fc6c80e51d37. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FRS182158508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03282f94a7585b5f7d35ed375129c01e456bef23906b07aacfe684bee325b11a. 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/FRS182158543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cf9b7b9732a0f407d174e067d5f3dd1886cd50967f09feca786a94c0405749. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRS182158541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd885ffa219bee8ea7ca85c1aefb0b8ea5da57caaec356e6935c1f9becbbb9756. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRS182158542.