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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0490b4b27de74666839a94daa32b7eec94843a070488c4a9c3b6e4b5842450. 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/38716995-caea-4f13-ae82-45748017bcbe.json and https://artists.proofprofile.net/proofs/artist/38716995-caea-4f13-ae82-45748017bcbe.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1326b4e4027ec8396467aa7bf572ead187741e812fad05499871a28923db65e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZMHL2286797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561e7568e25d403b020e4e75f00450ea6168ea4b679c109cdba66dc66c7b8c9b. 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/QZMHN2228127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3cc0e5381c237790e0394aeede4ca72955466a612169a4af58aff0e116cb56. 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/QZKDK2246957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810ab5ef02a2c953f521ed8b3a53bb3468ff68e634b62caf1c180959a94d5084. 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/QZS652380822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1928a5a4cf5f2fd8f00d786293d982fc5c9e9dff40d10d16a7aa334177532bba. 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/QZKDK2226611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b0071aa9e9c8186d00dd186654995545c24e47b96a94b830d86cdd5ace9853. 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/QZS662149795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e12680fcb6e845553eaafa1cc62d50758d216dddf444ca7bc31413ee96accf. 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/QM42K2102819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73b1a013f5e7ca837e3fd970d1fd43c94dd672f57b153cd6b553bb47828fcc7. 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/QZMHK2045215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598ce5ddf40dac1c9314cf473405279571059f244b9bb0e66d51fa6b04367127. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZS672255142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd827e37660b482dd9472c0a174155bbb376f2cc33eab86231e5c417e0a1498. 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/QZS672219054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6786730c2c63fae12119f72e8fb265e068851281bcef518e32230dbf45f57cba. 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/QZMHK2010714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56967f2a24547fa2b83c06f1191cc8fdc77729cfd81b4b232218036bf93590f5. 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/QZMHK2215774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9850915c4c5d859a0ce22a2bc36cacb1094f6f01843ac08e7d88d7bafae58736. 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/QZMHK2266079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba40d28ad64a81ed7e172a2d31ad4b2f2ee89a32b963dad07e1637ed9a3ee03a. 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/QZMHL2261696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bd4fcac6405ecada971e969d0439c9890daa51f86736d20ef933996df4eeb2. 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/QZMHM2265489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02760c59d5612dfb4faddfb65047e0db0366723d2b113f6a02a3f861e83c65a9. 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/QZS672256672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7037012d665155d730ff3806c0f6f11b6369ed809a75aad4d9eed0cee20b75. 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/QZKDK2224223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe850c7e654dbe25b65e857aad85a353958991ce21f8b6fc4425fcd5accf077aa. 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/QZS672155166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f971c506d974689850101a1014d053f3856cdbb9e8d7f579aa29667be96dac. 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/QZS672100655.