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 0x1526d5007571fda232cdf197272bf1cf510542f2c1b416a48b71be7ac9696e79. 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/d8c42faa-8f21-4d06-8c94-601373e31199.json and https://artists.proofprofile.net/proofs/artist/d8c42faa-8f21-4d06-8c94-601373e31199.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 0x37757b7f7fac3d8128d0f9b0f5f479017ca90b63f276929ea9c030d05d02fc1b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWX2130387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6017feaf836b2d3d0ac9d7fe20b9c45da26af98329e7b028d4aac2955cb64442. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWX2130390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f877305ed84a48fed6ed60abd5173c5d98aa215b445edbaa9810a14e06a221b. 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/QZNWX2130393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556f5904a95453f304ecded6e964cc059cc222e061591879a229dd208ff98bdc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWX2130394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209b2b7ee2b5c187a6da1814c72ee4098726c21b13f243a834e21a3037f1cb60. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP42243040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51bccd9a921d1c1a1c3b2674b384e93014c9c32fa47ae828bae506d9a28bfdf. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZRP52294521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320470e34a06df7e338fb2e9a5e337bf20dd8f286e0e3f8840d539c3fd83de94. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB52245799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d53d8565ce0c468388ae0e236f72edaf60e5f4670c7de5793ad885a4bf65c7b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB52245800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615a837a586d8991ce871c1609cc55937fb2bfc47b2cdac75c12cf98d05bb097. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTB52245801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a63de24b0321cf173d549e495274908ed1d18050c7e88a3026ee828c68e1848. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:20Z), 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/QZTB52246981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea860f72909a11dd1f867b3399102ee75b5a1c2a2c00a34b32a697e49babe0bc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB52246982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaf76df89f5ca660a8552bd5c76ec3b32a1dab6154fbdefdfac28e7daab2809. 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/QZES52399615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40ea863e844a13a9a6c5064c98da246cb4d807dddc47781a17d7eda01fd336c. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/QZTAU2392349.