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 0x2a19a7bbfc24fec0400b35cefba87a1b0c719aa40b7824bc5732e4525cffac0b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff982100-cdac-4b20-9cff-331fde889b70.json and https://artists.proofprofile.net/proofs/artist/ff982100-cdac-4b20-9cff-331fde889b70.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 0x9364ae4ce2ccd30484b2d99a2d076ed29043dabfc57bf79e004d8dcc4083b15d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAEA1966675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065369a586b2877da266e0897ff1d686320f072412e72cd0435701f21cb945ac. 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/TCADU1850246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4558c2771710e02318635d4a94e3daa7a41f5785ca0631a08b0a5d4a50537f9. 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/TCAEA1966779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ff8c05872490b13023b09a4835642e06d1c1c49ee41162e41a034a1233905. 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/TCAEA1966819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cba362211e66272d35a6c4ed88661368a15989acc02c393c11c30264b23c7d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:20:42Z), 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/TCAEA1966824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88483ab5f670655bef7ed33611a2c509ed8f0a7e2ee292fe3b26a06596f3e13e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:38:52Z), 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/TCAEA1966840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818b56edcd9361e7730a76e674b5e3894088bad1d3832db55d240de5fb339d32. 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/QZWV32453793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818b56edcd9361e7730a76e674b5e3894088bad1d3832db55d240de5fb339d32. 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/QZWV32453793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde26e8c75320999ef4f4a675c1752017321b3427b9e5ae7e1dde00584c9d3c4. 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/QMDA72235609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74c350c9ef5bbb3423f99244a61131e765baf256ddbbb61af1d91699cae81e0. 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/QMDA72235670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d92ea6dcbba3f32d8e0fbb2bfaf579a44247d3df2f4efeadeacfc9a13650676. 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/GBKPL2210624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04022a2b7eb1c2d076f286f291c4d7bacf810901174ddf6e0b062f167f837baf. 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/GBKPL2205042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d92ea6dcbba3f32d8e0fbb2bfaf579a44247d3df2f4efeadeacfc9a13650676. 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/GBKPL2210624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04022a2b7eb1c2d076f286f291c4d7bacf810901174ddf6e0b062f167f837baf. 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/GBKPL2205042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04022a2b7eb1c2d076f286f291c4d7bacf810901174ddf6e0b062f167f837baf. 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/GBKPL2205042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d65af54db68cb98d761117452292b7e5b2fafb71ee602f58d525542e8347ee. 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/QZHN81916736.