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 0x7f33cfb2adc035dea633dba1d72e0aa72a0a001e4b99d24ccecb2517ea859f87. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9640b34c-529f-42d5-b7e7-05c814b3c9dc.json and https://artists.proofprofile.net/proofs/artist/9640b34c-529f-42d5-b7e7-05c814b3c9dc.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 0xbfc7813eeef4e1c409d776a225f8030aff1e3bcea1d747fe79f595462ffbb1ee. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB22440944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56c7a43ac2af45ff22c0271aafe5a39427edd968b413902e55c01c144d9032. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:46:15Z), 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/QZTB22440945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca04829c1a1b75858d1ccce61453e1b0989adc722efc0b366a830dc45127021. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22440946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a2794cbba2dd1238db666da6168d2f021cc082a6e55c8ad4bfce862543178f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB22440947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f8ae4d1e76a3278b811e20c16aff18128ad705baca2ed8f5b88342ff64aa5f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB22440948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c00e3051b9269a037db9f7c59b50c9e08dc8e51aa0675aea793cf14a1c1ea7. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QMSAV1103234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f689d38793caaedb1694c19b1b8fc1974615b668b937bc9a921a9f41867de69. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:37:27Z), 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/QMSAV1103523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f34fdfa8eaeb19b6840ba883fa4d53550282c2876d24951b4e0e725669d957c. 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/QZTB32459996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572502931bda8d732d85038aec73b52d80c1c6ac1f789141d873f1f644e5508b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBD2422725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005c5e3a75ca9a283e9cb49811e68903aac2491d2a6a164d4ee7184e81037b3c. 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/QZWFR2470497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159b9a0a74d8d5cc6da5dcca23bc56d70e954169ea717ed382b77113d220e094. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7N2470513.