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 0x35e5f98d622b45ce5cef1f306e5c5a037d0fbc620870a257924763705911386c. 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/a9632956-96f1-4d5b-81e7-14ffcc1edc4a.json and https://artists.proofprofile.net/proofs/artist/a9632956-96f1-4d5b-81e7-14ffcc1edc4a.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 0xcd66c68caffabccf24a9b306a1cbb7d9d0e2a4bcee58c65ad72ba2d7e36cbc8e. 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/QZFZ22125368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45ecd41794351ce91246b51c91bdc20c62489c9487d9d505add63199cdfc952. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6MZ2116730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b95d22d9a86773b1ea7e3f15a61b201032f961d8f58bfa786ad763e8e8f614. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM6MZ2121362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6cd6c75c692c0fba00420c057f7dabbaf0b5ff00025a76c95dc099112d89e7. 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/QZHZ32285127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcef5b2df4dc1e495b4f3d7a0ba06d30296de725dbf2725b6ef1e4b74163485. 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/QZNJX2206521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f3b966944092c5a605118885ca034b1338dd12c248d8750fa9440947048242. 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/QZW9K2233655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd4421a2b5884f9144525593e7ad6f4369a92b209167fa91b6cf022f668054e. 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/US7VG2305759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc344eb30adec170b94130551ff227b5869b3a312c73039a86347fd59a66a6564. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZGLS2370379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc964a22cbbde1adc8d09bcd7ddecbf8876595fd86b186ac11d49315bf2ef39f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNJY2304878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2041941dd57371011db08cf9181239665354de98a5286014f1cb3aabf0d1672e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2422106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf98a2aebecf9abd90abb37bcf9bdec1dad5824c00505df20e9d95e3d7aa954e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9K2422109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ef2a34a13a9c7ebbfb63603b0375103da0813b0397cdc656a598ae7b0ed952. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9K2422110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd1c88437f9342bea84644a039a798d31643b9f0340016b2d20ec175a15348. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2422113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e81c411707c64c9e9f0e44cb3379f3f59f5ee6cc6fe328e97aa16e0807773. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJV2223535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79c45dc4f65941dadcc210e1f05ce0cd5a00bbe9c961257e8f7876b2bf2e49e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2346090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc142e0f6001dc2a02262a005b4e8bd74138de53fe51320e520463466600fb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZN882355905.
Pensandola (feat. nickoog clk & nysix music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec2a22fecf70e5720ad22a46069a805ff09d1e693f1c040a09b91e272b61b45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2349747.