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 0xd9f6fa133126e4686939f2b61f24196870221e3c8f1b72da944233ea49810228. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/325b3931-8cba-4b61-8332-744e0d7a5996.json and https://artists.proofprofile.net/proofs/artist/325b3931-8cba-4b61-8332-744e0d7a5996.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 0x92b1e3d77b38620913d5f1e3865ccbc2b7c46d008d40daf456701fda699c8885. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAFF2025247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb685293a501bbb5d0ba4cb9eadd9c6d8080a32789fd4fd466def45412b0aba. 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/QZFZ42382194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8620ca7a654b3b818c6068537e1cb0b6bda649bc602bcf36956a47ee1f6ed2a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:38:02Z), 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/QZFZ72369913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fa07d00910310be5cc72c0d6d5431bdf6472ca67e5c8e90d03d9b1cf3a17bc. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:50:56Z), 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/QZFZ72369900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653434096620105113d4459f823b12abbc2093b8e30b1c63738228eca1c78220. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA62418836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac054c0bbd7514947d9ca61ab478192e4e5c33a1d772f9de55dc816f27725b93. 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/QZZ7L2424415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb540c5e85e895f8d2c3d0324807905410abfb9f15bf8399898d81a50d45ed3b2. 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/QZZ782549499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f998e0bb2948c0cc470bdbc03ee7da81216660d4755988097b3fc471d06c70. 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/QZZ7Q2585804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3c9a67e591b284295a14d115e31a80a01a43f33fce0e6d3c0c49d0d68fc82e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:20Z), 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/QT65Y2593481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0937a3db42b3069dd538f5cb9d39f13776ed656e5c9470f4794f14f2132f88b8. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QT65Z2539692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03022f2de76cf3efef0fdc6917a08e09abea0239de0f4f05c73957997ed3dde. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT65Z2549820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813bf66c45f86687f3d717affe92ea0a7fb4cc9c0cd4c3523125bf212c45da56. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT65Z2549628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9090e411511e5e0a11690cd4a02ba93003953a3ce3f6f725f37c85b608785786. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:48:22Z), 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/QT65Z2550349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebaaf16bc2feea8915ed86f771732723f8b003b7995c9d53efffd02a33fc39e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT65Z2549911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4eb54c2c62b69cf672cfa40e970efbea6e96e156ce410a5746ccea9fe45d53. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT65Z2550077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd818ba467bc3cde8e82897f0e98010680b8d44e01195df3a8887d7bfcab60bb7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT65Z2550191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326651997d105681cc4239c12fee7f2958cecbc8abee9fa9f2a117e967511161. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZFZ72315876.