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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4593bd4c7bb7a7ad6a0e54f4e834fbc62a17bf1c4992f6e98424ab1e12632e5a. 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/2ed70ab8-e251-4e83-8f70-5153a88ddbbb.json and https://artists.proofprofile.net/proofs/artist/2ed70ab8-e251-4e83-8f70-5153a88ddbbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chewing Glass (Severed Steel soundtrack)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe45ad4ee7633c6f2cef30166b41d57f6e8fec3c08f77fccca13502885442343. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMER2195979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e304d01ec9b86ade364ea33ad4336ba703bea4324224e44f6e531bea8aae86. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZMER2195980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4729d7d5f9f0f475c62e31b735903912ddac0189d959556766ed27a742357c4d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMER2195981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abd3cb729a53e33a2f67af93b04e71d1c3af189e14cf4203539c32f67b56aea. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZMER2195982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e60904045dc646830ee071226d98eaf7c41c2f7c222d15ae5050a07df6aac. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZMER2195983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd59de2f4d9fd219e9cdd8c83d295801542ed91771f3767ae3ff5ad490030698. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZMER2195984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082eac8a6b75f67cc25dd9efa25aa585f10b314d952ed09d3438dc633b6695d6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMER2195985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1136b035a41e19309d3e08e0976e4ef8e6c8ab0e017afd0b3a5e0c103f7266. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZMER2195989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48894708acb3ad05a2a6dc3369a8151db583428eef57cf43756ba7c27b95e7f8. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZMER2195990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed08a88a485ebe4e94400443aa12bf8f762fcb45c48324aed7bc4e116a604932. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMER2195994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e50c07488467860ca204160171558f1566529d70573caedb6685e9933ea3c25. 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/QZMER2196005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce280429af50d53164341faef58723ecc9e61fd06d92b1dbac6eb5a39e145e6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZMER2196007.
Chewing Glass pt2 (Severed Steel soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5765806cb81f9213a3b74720f8fb24b1f729a45e12906a5816a22810b1cea411. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNWQ2149121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2f5ef9d855ffd4b1fab8cbca424973323782808626f6c0cbe13fddcf8bc976. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWQ2149126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728db2d2734f165e0e9bb78678ce10a29f141ef3e361f5c1713a2aac35dfb71d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZNWQ2149130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b4dcf94a9f4e40cd6c7f125fe92e1ad9f7dbc51e5a60c5b14eef02b6f23bd0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWQ2149131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a351a21945e8dae6f336cdf00688df980125dccb4fa2dcabe18ac80c750e753. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWY2253354.