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 0x51e3c20b950cd5322ee0bb7862db3db394225b54d5071d3b3d2c834959def3e6. 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/7ca77d49-8f01-4286-b897-d076688b17ab.json and https://artists.proofprofile.net/proofs/artist/7ca77d49-8f01-4286-b897-d076688b17ab.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 0xc0b5a7a5e0da40d6ea9bfaf24b8d41cb11ed5dcc47905ef3c873b90ea9eae751. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6QE2052533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2ac037ca67e5dc26abf8f8eb7f3fe65967c348a2e7e6bcf0cc6e225cc7dc17. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:13Z), 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/GBSMU8395439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db6f604b563821810a86196effec7da7171f6352d6a7b64c84354ae58a75acc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZL382083620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc0b6aedea69c7ed151450e3dd4de1b01e0b349d7c38995bebea300732c7213. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZL382083622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41c2720050936fadb8bf030f700abf5215fa4d99101163146f8d04d5f2288b7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZRP42120774.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424c8194f4a63dbca07b43001e53bf54bd95a268509a6c77adcb11198e81b6dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWS2107480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432357c1da196ab645943c0460f7614b8b6777923d3e20431000546b488a55c6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZES92209816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c760735079f37a9bf6dbc43661d2d63c44d21f3453d6057a178ab0b78ed5bbf. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:55:41Z), 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/ES75E2206138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a79ecfb4cb6bf6e3641a42c552d192bce7149c6703c8e2b74d8b52f3df26c7. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/ES75E2206139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595acef04d17d0b8a7dcfa5ebf1dbdfe8a5274c1e5b64942f89a2e3c17d35f63. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ES75E2300785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc969a4d2ff354a4d246197e9a657cf37c1327bd1f4832c206d07d7841424b. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USA2P2438931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ebdfc17ec56c5b16301d75291aed382e5ff478faed2733fe2840028698e428. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QMDA72490384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa8460fc60deb5b078294c44c68f3113acce632f0f76bbf5798c151141d4a50. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QM4TX2539001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f3228baec1dcbdcd1a22f20364995493e65a5db5a43cb22dfe1eace5943883. 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/QMDA62591088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4ecee40b34115a6d12f7090bf82f614cf8b215a84aa2d32005ab8733b1cde5. 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/QMFME2556569.