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 0x54103406cfc9968e41e52c653fdc54052e80cb53a69557cef7c1db2a68528d16. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff37868e-53eb-4330-b405-1447641b8d3a.json and https://artists.proofprofile.net/proofs/artist/ff37868e-53eb-4330-b405-1447641b8d3a.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 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 0x09b1faf371c6195d43277696d5b107ddc65bdca97e357d8d83bef815b97ba3a3. 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/QZHN92448451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1588ddb0c078530033bde1381897f1d2b714d7006f30fe86196050f9fa2523e. 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/QZHN92448452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ff4ac8e8451825a2fe8a8eaea906772863f35305346eb2c3e78426dac5ff1b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92448453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf88e707c0f075e18016f8bc4d4ba005bfdcc428113484642807fe920659e07. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN92448454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fa2488f215742408fbcbb3857195228a0f77d01de272d0e1eea7b72c2ad7db. 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/QZHN92448455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe6ccf1d90373aaea17df36c8f788474a070521476db0fed2b3922323c74d44. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN92448456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3e0043f47afe19d80fb3408a3c8737faf53ae8fa072cf424455652655f4c5. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZHN92448457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4276e405f998979b7731ba777e4bfb0712f06adbcb26de7bb1d31a197b9315d. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZHN92448458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1948b30a35ee34a8577904a92b5cb5b94b739babc2691519b0d215fb92a62f84. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN92448459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ed44858ab3cd4cdbdf8d4dee4df8737cf721eb1dad8a31e3c76d5f70c61e1. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZHN92448460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd3b1bef7b2f69073f48b805e5633342e70dda796f2ea91fab210eeb702bf59. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHN92448461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4449a9d43aa3d634c9da74e06de3855c7350cf0b9598b0801030745565a1e7d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN92448462.