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 0x2528cee2328857a0d376a8fce9725834f2829eb0def11ab0cf6e53757c00cee7. 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/5335c89f-b815-4ac0-a6a3-7142e272054f.json and https://artists.proofprofile.net/proofs/artist/5335c89f-b815-4ac0-a6a3-7142e272054f.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 0xbbc86c2a1e5539b86f038156139357c707067ae5825ddba21b1cb6900d74984e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/KRF922200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8e6f0eb65c087347f6794592175260ad76b20835b2a89546ae43e629c6b29f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM42K1904311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26842a0918493c0af30592cf288a662f65b3e8459598e6e8049301d86942ba0. 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/KRB472401787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df1bf38bbd1a870d38f8892254266e72d1c4b9209bea2befb34aef55bce126c. 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/KRB472401788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a61b743c1914819794acc39cebbfdae097e94f7da228659f7c2e7464c23cbac. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRB472401789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf03e042871587d6d073550500a47df588fa431cd491a5474a87b4462bfa2fcd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRB472401790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534b88191a0c91b9c83877b0a483216d370deda1c14ce6793c88215eee455c87. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRB472401792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2558f0ff0ff4d9dedefc1fa02ca7daf9bc946caf9e8007ad696eabd857aca1c7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRB472401793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182887edbf8f02ff829eada4a4b5d2d12567528d54d93aa81d62398263723a86. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRB472401794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff5b5d88aeb9d30dc6a73e22d295f652e6bde0afe0bdb41395224915c137ef0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRB472401804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45a56298d0f0c764c9a1ba518b15398fdbf882103136f962766d0add5ab35e4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRB472401805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989a50c1025f86f3eb5287a9245e8866f89b95e3d938425c19eaa3b6035ed275. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRB472401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4a777f2e1897575490b81abbb644b3d4b1e761be143dad7d1b1749b1639da2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRB472401816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d85c06b39e4a8e4c540b0db8a06b96304d56957b3d044461dc9e20debaaae3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRB472401817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0fc0b6545f89b759969a4d6175f8fa36dc3ee728be91439fe8083b2ffbedfe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRB472401820.