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 0xa864001e831696d45c2b372c29d834f989a89d056b14288fb7e4ee6f10b24418. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7af1667-d3e6-42a7-80a3-3cfa40f5a991.json and https://artists.proofprofile.net/proofs/artist/b7af1667-d3e6-42a7-80a3-3cfa40f5a991.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 0x1acbf6276db3d97bc8562dc5af2d41de965e67b5ad47daa56aefb15ef91453b4. 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/TWD251855221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb071c356c5faa61b60868cfb20ef812252a5670191e7d852b70f3a19aff49f9d. 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/TWD251855222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb17d18c490bebd3864fe390eceff5d1f587e53e361882ad734294b72fa9c76. 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/TWD251855223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb42a3d6478ece9113fec9ab243a149b35cec84a6281d36001f52bd4cc24253c. 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/TWD251855224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af5427478ecebd24fa43e8d163140d2427076ee7ed3160925d17b4719140ff7. 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/TWD251855225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8267a0143709eaf03ec46ef62cce29b39fada8b4d6e21b3b2b215eed616012. 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/TWD251855226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff3fcfaee83814320e06bc40cdd4e765b0676e9ddf17052efab223a228f97dd. 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/TWD251855227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7764a9bf461fc4ec3025fb2ccc038050ef91c36918fff888e59317af5d8429d6. 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/TWD251855228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe410961137e152f4cddc699abcbe02fec6f178c46575bac24e358ee0b5de345d. 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/TWD251855229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a202ad9745fddc5787451b1e6b267707fd7441c5d286fec21be2adb48810f73. 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/TWD251855230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2574c271c2dfd91085119d6377658028832391eee734da9fc939ebffad6a8c88. 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/TWD251855231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4690f7fde1c785cd0d6b46aecd0c87bdd19b03efd5f8c121ac2c8081edfa5b2. 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/TWD251855232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf0b11bce06da3ad19299568ba027f5caca6bf8ba60511a2a94cd4c190b7e0c. 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/TWD251855233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d657136832722bb156db233b3c603c8137d059b8b7f161dcf3867483e9a373. 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/TWD251855235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790d0d21124b957388447007da19b0550ecaee064452d36439614338134acc27. 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/TWD251855236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94e298f27afa8bb22b41338f0faf21a6a494ac4b8df3fccf9ff964b52222f7d. 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/TWD251855240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae34b138cae34fe60aec85ec548c034900357f64b70d58c7ff26189cea84240. 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/TWD251855241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a3263ba49a36eeda0d4e608e7646d3919cc2cb5149fe2887c2e46d60369436. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWD251855242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb17d18c490bebd3864fe390eceff5d1f587e53e361882ad734294b72fa9c76. 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/TWD251855223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1bb07d5b24694bbf02b1b5cbe32f28d0a174b804634d8b4d4dd533f2e2a75. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWD251859001.