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 0x37bd9514708fed65c4264ac9b2e948dd3ee62d6568b081796b9eb0ea765d84c4. 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/bb55e36a-2900-4e60-95ca-bb8da8fcc139.json and https://artists.proofprofile.net/proofs/artist/bb55e36a-2900-4e60-95ca-bb8da8fcc139.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 0x6f47ca7a850044d3c7ae41c50ee099f3beed01b6a4844ca93d05c886bfa150a2. 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/QZES92099080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde68a9f07553b3f2fb29887b4827eadf54d7a93b6bba12f9d4957f9bef809c78. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLR2189254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9db5ca2cb9945affc743f7b206b4e3c47d37e97e9aa9c23c8528deff6d3c4a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:06:54Z), 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/QZPLR2189259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee0bb1aea3294b0c7620432675cd5aae5724e6216fee2527e95452c901b6f5a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZES82222561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984fa64822fcc3fb9ea4682c3ad91ab71fd703a0123982dbfcd383eb54721b40. 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/QZNWS2221840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda16757a8916711fc57c113544f0d1e7366083cd61e67c73234596ed4600c507. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:14Z), 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/QZTAX2202837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9716a26566af576c8f41bf470eb8ec7685cfbaed8329e47b3b7991912e1305af. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:33:17Z), 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/QZFZ42359915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419c18433eeec87b0c33d5ba0751b3f558d27916667c04a449bfbbed84a8795c. 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/QZFZ22330930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4335f13de7701dc22fe5e0177bf79206400ad38a71fc7dc289c9d713609524. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZVEM2323238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1036b32236c0b375004c376145f69d3243d65f2d4c317bacf332c85f4a9c2cef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES82385277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe91a73c9f9fb6a91efb2da4c038021a9929a192fab8ff2e8d3f58ff4294fd5c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZHN72321644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe57c985f3d300ef712c81dde8184b980d0e5cf18db807d2d6dcaa3f40b6d89. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:19Z), 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/QZNWZ2360843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c03aac494939cb65f802447f2dbf7671699a312c4f0b7956daa7e0ab2539a9. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-20T11:53:02Z), 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/QZZ7V2478177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc6ebf99dab266fd183d4ed1b5ef9b19b7d76f87a0657c05f6b3bcf3264a59c. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZES72515965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fd7d3f645034922ebe090e8120c9778dd4003923facf10855282f099450c6b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7M2428415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529bf3eceb38310c63f272e81e5fe9f9676514e14d945c2686c1769d8c4e2c6b. 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/QT3EZ2417665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a0ce0d6d384adb3cd8f1286b86170593c93bb5f77697d959b687de101e39d6. 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/QT3EZ2417668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1dd731fb30433c8d1769f339e522847287d26a11bcf66047de99b7d3c9c9ac. 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/QZVEM2569460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962d1e5f3b9372068a2f28087a0ff9609ae74cb2a721936cee458a2ff93d91f7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:59:53Z), 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/QT4K42570397.