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 0x167ea0214374470b6177688a5d03fc67f17d509070b14b807f190cf3a2b82886. 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/54e61ab5-5133-40d5-be44-e4ec69be60d4.json and https://artists.proofprofile.net/proofs/artist/54e61ab5-5133-40d5-be44-e4ec69be60d4.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 0xf0731362021451678300e2a7a80397bb5ac86bff0b07806ab5bfab72f5bd3038. 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/QM4TW2408651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81db763e462aa54d46516d69d30c992e3007590c291385e70191d97fde7460f5. 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/QMFME2331796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc5f95c41cda19b62633ae9e51c9bef06a60a6b6cffa2efed919b4fdbda0b7. 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/ITF252400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b73e539cd6a90a3c26dbc005ff371e15992ebcb3bd1cc686784bfeb5e2867. 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/GBRKQ2251189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b639cf8614bda4078117900c0594624ed186d48410493cc32a6571e90a8295. 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/ITF252500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7142303638ca261f9fc5774a60b552c0931998b2a3b1be529ac6dadd3e9453f9. 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/ITF252400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9d72dec07d58b8116d82b9cde0db0f28e8d713bdbfb4c4874b2765a9def56d. 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/ITF252400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f1e56cd0a1e7c6c60068f63b3b9706054edb64cb2d772f4c37253954d4b853. 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/QZ5AB2335799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de8004a71f5ee940e9fa4710591fe9deb520956a453f77635ddb7891eb8f80b. 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/QM4TX2308182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e84de71b3563fcf95ccfe777e9c4074d51a0fab202f000d584feb64e4431240. 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/GBWUL2295880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c7a05528142d1b162bf513dc6e74cb039bf834884fd7425e8c1cfe18227493. 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/QM4TX2200925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337fe970f59765ca8a03c5bd58dd36983b2c8785b25e5440a64ed0ecd0a97a25. 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/QMFME2198634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93844168eac12e716c83a8ed9903235cb860b267590f4c68f10f84d9846415e3. 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/ITF251900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4335a73b3186a95e27fc91af0b2b9be229ccd91a22d98acff36f32744e667f0. 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/ITF251900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa100a7deb3e962517a02059dbc157b434dfd5c2e3b2e1df6736a6cd9fdb6a589. 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/ITF251900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c531d43040dfd39e4e3bc4581070feba94bedfa5c588ed1a67e816cfad8a9f6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITF251900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce4f1d87e4d50716b7857838f9234ddce297da09a5d8e6b49aad19d68e10bc. 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/ITF251900174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb142c07061fce228ab58a9ed85c42732ed44936641f6c0eb51301a87ae3c12f7. 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/ITF251900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44cf0c760fd789a53c0a36c2702f95c3f41a4542504e4f844ef1b5c4bef64b5. 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/QZ5FN2130251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77db19486b74134cb398f08b5afa870254a6c56fbf3330497f9b405a3882d44c. 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/ITF252000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346dd10d8f14ce2d626d8f4915f8dfbd56b03ec90233e9565ba676663a80280c. 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/ITF252000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04224d9dfd8e76093b047754dfcbad1aa5412a46005ffe391529b5b29fe1cda. 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/ITF251900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb2f426d197ea1dc7e8afe445bba5006644c095f77260a8386073d982f54eb. 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/ITF252000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7962db548774a78b22ec12d4662998712db817c014b9028ea67e488436124326. 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/ITF252100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98462c6d6eb52cd8af85eda6799f8a65eb02f931e00043c8a925adee33794bc7. 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/ITF252100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f9a4a5e1f8ccb748f95c0c1acd02e41d5fa03dd71fde1f2c0b59c1c0fea758. 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/ITF252100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d38fa8758df0edce2b74c5579a316e03239e76c6aaa7254a98d3c5413da7e1. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ITF252100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a442933977102b127402e3c5b716e00dad5e5fbb20fcf5b92f0665d276afa3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITF252100030.