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 0x7267da87693b536efd9ce40ac156f12870ecce4a72c2575e10259692ce6281d1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebf4c0ee-2b7f-4675-95f7-747be1c30fb9.json and https://artists.proofprofile.net/proofs/artist/ebf4c0ee-2b7f-4675-95f7-747be1c30fb9.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 0xe519fb3559b4f7f8333aab484d14467780651a6354b8a9f5640c15f94248ceda. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/AEA3A2440706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd3a7e421f4d9d77ae8950411c3e3b53211be56c830f20c055ce15fbea85de3. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/AEA3A2456969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d7c3d6341327b528b90bb9b4801bd4aeb4f6d8b1a04d701068a3b928a5085d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:58Z), 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/AEA3A2456972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8c73b9c4ad2bb1ee98062fc5a88abbce4a6bfb4a10598765a2a9c1aeda074. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AEA3A2456973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2006b3b13ba12b37d827b197b2f4e4d8c8bcba51c6ac857698d3e43b8a6f9c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA3A2456970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ccadf20d557f40f0c39bdd4b98ece50be6b4c9fcb53885aa8b9df501124edf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA3A2471625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eedfcae177e3e4e479d4fd3f59f5c9def05e668ff494a57d06a674ece8e0a2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AEA3A2206263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc07969042a3e38f5c6af1011c015742950cda111efb0dc73379efa44df75d2a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:11:42Z), 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/SGW502276909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ff1b52ebe08d9a526895c7ac14de54e92a73294f44f0068e03325718ffb90a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:37:39Z), 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/SGW502213942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eedfcae177e3e4e479d4fd3f59f5c9def05e668ff494a57d06a674ece8e0a2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AEA3A2206263.