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 0x838b098559411e2a15e33b721d28b61e9a2ea7b2db2d30228b505b6a7bb77aad. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c2d2c04-f262-4249-b364-b905ffa1660a.json and https://artists.proofprofile.net/proofs/artist/8c2d2c04-f262-4249-b364-b905ffa1660a.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 0x2ec529c206ad71ed7da93c4b5852732fd325ae40b4aba675e8a2052f2ed9fe1a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKA8U2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd860b3511589b502e13116d9faaaa08c115f5a463acc36c98052679d4cf70430. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKA8U2300037.
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 0x7349169238c49faa63971b77605e69837abe5bcbdd7604e94f983a92152e9cbd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR8T62100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa137eb9ec0fa5d420dd2a389109d6da229f5c455969e8a1abb1840b4d7c1b020. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BR8T62200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a744c6be7fe467496c75ab01719606998420fc505972c45150da3addbe2c47. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCSNT2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cd21b8f4d8e5f75aca977ebc358208aaa0c51dfcbc8c09d813e2d5f50611cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCSNT2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6293d0ec06165a810e8d29f4e0682e5342dd4e4c599d148c16f00d93b9c2201a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXHWH2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45da65304c522e6ce386312fce4b9133a61f4f96a5d2d5c1303380b8814e845d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1845840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019c8015fb25dbcc16cf8fcddb2de98bd5c3ad508fd7de757ff7c894851f53fa. 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/BCQLM2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c6e7b73d5f9803f905257860058d9343e925a16c618f7c4b46447a50a75a05. 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/BCQLM2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02f85912b67f8d77f66399128909c8d0baaf0066d8266a6b8653024eb5308f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCQLM2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53300c434395bf8a7ec833bd178662f35d4e435901ee323c52fd9cea5000bf6. 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/BCQLM2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd2a0b1ae1dfb501d35e4f6eaa27ed36a10b771c7cadc490b6bc320776b9197. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCQLM2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aa1062c6c139baeb5e81ed0e0a4a25d75d6a09262ab3f70e3ab6660b831b0f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCQLM2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4e3d74947a71bfde6c07af5a40e6979b0e8bcbf838fc0b3eea5f6bf452ec22. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG2380718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5dcc497da7b88b825a9a2a451455d2704e01ed620de313c41b8947f382ca1a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6M2511545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bd7ff2937ee10992ee1d7a07130002104b1e57045b9f66fac16cd1d0215f44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2511546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1245b0c7088970a406c0c9186fe945f9490d3aedaf1c25d960694335f6c613. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6M2511547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453634180a387e7c287f0fb19a494f6dfcd80f3325f5b1926ec07bc03ddc5efb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2511548.