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 0x226a49143663fa9b2397bd6c70d3bc354c5a3ed6e21bead860bdb7d5d66b6f21. 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/4b80abcd-c500-4914-bf04-d4c7285ab8e4.json and https://artists.proofprofile.net/proofs/artist/4b80abcd-c500-4914-bf04-d4c7285ab8e4.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 0x463d14ee51853318d62a570e6baf2b0be31f65517e50b8d58948418bbfbdbed2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFYY1944135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62619e89166b4ced4bc95d7546ecea3cbd86d56c495f2b216dc15e8306fa3f2f. 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/QZFYY1944136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1abd76178e56ee97332dfeef1afe5279f30a2e3f09c45af4effa65d6b6cc88. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZFYY1944140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2019fb4e68976ce8778ecbd6222e3a7a434f7bd8a07bd01b9086752e3a057b74. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZFYY1944141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bc1462e815a75a99236bc24e6abfc2d667f67a06532315754bd1d8d7262953. 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/QZK6N2487604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40f9911571b175b2721a49355354fd4600bab30ff5589a1fb306042b0172045. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6N2487605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe065624391f24583bc628ee539e66c48e3748629aacaeedf2d867857d88cab9a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZK6N2487608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c09e43bc3973ed961a2e62e4562141fc7d12c38527320685c5d0c10284aa584. 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/QZK6N2487609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216c84ac40ce6f0c5eabf6f02445c33cfb098fb990a96064c7890edb011ee2ce. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZES82085618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecb167237818d0460bdb835a13e05b309f7db5e6f57df549a7765809df5cf54. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZES82085619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92637c590203465f6908389b10d78cbe3e2618fde02637be4b2ec9976ec4adb. 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/QZES82085621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a5ca59c9cf5ea69ba443de2613279d257a299ce45ffda5f8c3f88eefefbc64. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6Q2005713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a115ff1d37f212dfc0046390cd910eed763acb18241ed82ab3a4ad3e73e7cd. 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/QZHN72198949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3affbd09aebf1c6f46d15d9c62d22ea7c295712ba5682ab46bce3a4ef06cbd9. 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/QZK6J2111936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f439ea18359edc54b0b726faaf7dc250a37f1d90396d2441fd2222568a4abb7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6J2111940.
Don't Ask Questions You Don't Want To Know The Answer To
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce370e641e564ee068bfed41673c4d1d647313af83ac6c71817cafdf42af50a5. 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/QZHN32419878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2622c97fd42ab2ba1ee0ecbeb16b7055e2e97c3336c03205a7d99f15fcb29808. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZGWX2051026.