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 0xa87f652a83d1510a850dafbf7cd1e20588c128b079c5f1a0b7a275722ac04089. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dda3765-2d27-4e58-9da7-f56bc2882e62.json and https://artists.proofprofile.net/proofs/artist/0dda3765-2d27-4e58-9da7-f56bc2882e62.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 0x41e534c0095bc0d7f2ef27bd8cff4a985cc8c8264791eeed885f5ff2ba1d145a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZRD92201812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeca1a9a8b1357f2b247999dba9c2ee50399b735a9b50e149be85e0599457987. 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/QZRD92201680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05696228c1b239c31799fb1e182fd984bd4a7e6205b243361bffb28110759494. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRD92201300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ad37807e5352124a347cf12944652c0bd5040bd81fb36829b490059297e745. 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/QZRD92201305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6455b1e0f6fcc0b2c3d64d34e35740078139874d9c43b470fc002266485c72. 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/QZRD92201310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9227931bb85e40bcd6ad8101f8edc571f2bd64571ba3099c5f84f188ef2435. 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/CH7811105458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8ce05f0c10b4f7903dffd024000820c0f3390345226e8fd7b7c1201310eed2. 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/CH7811105459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58562ddeebb14a39c07b095c6f855a999d40fc8e85e07fbd87115603f36dfa2d. 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/CH7811105411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962648b38c62be0170caee90b969eb62a4d8cad2dba121687d50e715aac2f034. 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/CH7811105412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fccb9446fee0705c9d35d01499bca6125c05b933674020cc8a9c37e83550ca. 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/QZJ842402142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b151babdabce19f84bd9312b88110487cdac125b67538347f4547d3d76482f4. 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/US38Y2304650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7188bc68954e2a27ac09e1a33a25801bfa63cb9d62b38882caab8ea4a2566525. 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/CH7811107626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8b8fe5250c93393375a25e1a31b3ff62f9922e1fd605dd7f2bf999c5a1129d. 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/CH7811107114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c834e6c1a6a46805da23568f32e1b0687eb9568bc47cc6f9cf58ee15a491da. 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/QMKSC2101540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c834e6c1a6a46805da23568f32e1b0687eb9568bc47cc6f9cf58ee15a491da. 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/QMKSC2101540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d992de7ca328a90b48956b3317f2d4cf51f710de3ec6f502bc9221f895e6b9. 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/US6YF2200198.