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 0x79aacdfdaf48428ab6f355e57d5d72ae81a32c3c09e45b18b13ccd1357ef5068. 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/a18b5847-20c8-47e0-bca0-698e4c5acfba.json and https://artists.proofprofile.net/proofs/artist/a18b5847-20c8-47e0-bca0-698e4c5acfba.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 0xcb4e7c161b7587de286f28ea52efa87365d66d53e462afe8c8408830ee155c0c. 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/BK4DA2319419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf23a6a87906ad2c04c28383e0c9aacd17a70353aa0c538bcb3233e96ed0e19. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJY2445741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb467d58171867c0aba070845c6b1d1ffb850d9028efaaa3464ec4fdd40ff69. 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/USHM92162384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec193abb5cdc60e8ce3eb273f7b2ab1f0e29ae674dedf9033d21c2e5a1d413. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBE2407874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e74f66511979e849e47f017395789214ee150ea46cb895fdb6fbb48739fe2c2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFH2402294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0f6832c043ebbe90009da712a415e4dac3ddf5768acdec34f07fa1495fcfb4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFH2402296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13da59d157503ec68a4f3ad3d1eaa577d26bca0196bf357eefbc24c2f514769d. 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/QZWFH2402297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94928cf71bc579b9ca53b6a8558c99a2ea767c8ead417bd3c8e1a1b87b13dc6a. 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/MXD782202798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da7f6925fa889118ff385e6cdbb2b8f1221b1710f950bec201ac1aed18f8c7. 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/USCGJ2186073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec193abb5cdc60e8ce3eb273f7b2ab1f0e29ae674dedf9033d21c2e5a1d413. 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/QZTBE2407874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee6cf456746b7c0895af4a4365e4220c6a9807c25b7f16082a04c50311d9a25. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MXD782203994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e5d43c53dced1532b8a293a5d989bddf393dd2d56e29ebc25fd0fbf030693d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/MXD782200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e17a45146931b317a6e0c9e4fae2a830ef0a2bb2db53174ea41cf22803be1b4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/MXE672000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5450c1574f5e73608de666e66060a3eccc88a6161e9e4020036637d2c031d0. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USHM22153007.