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 0x6facad391b1b4e0ea9a0071cc40f7f87fc1c73479c27e3dc5d2b125e71927462. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66d2606e-c0a1-4bae-8ab7-63b36a06032a.json and https://artists.proofprofile.net/proofs/artist/66d2606e-c0a1-4bae-8ab7-63b36a06032a.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 0xcd2b20943a8820382d3ab8b27f35494aa058ff4df3a225ad1bdf749c41810d9a. 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/GBSMU9031794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942aaec77e96d0c4f924949c225024c5805ca01f48f433180b2982aa7d23c96d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/NL2QC2100629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517673e14f84e2db4364ad77f106a8b5a5c6d9b296ce9d04b3e18e1d29125c8d. 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/USA2P2135843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a22fb2c1f31f250e7dc1c1b851a7972a5f631f09ddda05f9518d73b8e9220e1. 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/USA2P2125582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960d650e6d49d74e3b8292976027a662b6677a2055a2b5467d0e2524976b6f43. 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/QM6N22116163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6f2f351e68ad1ba1adb3f1d9b15aa791fcb520d4dac0de7313c4e47e5b6619. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2126290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b7655b8e8b4efed9a898330df26057b400c9d99bf88b8b4213bb4ff8a45e3e. 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/QM24S2009990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0893cb91bfe6faeb05438df784a675c8d4471628c81066d5f76bf98df633fae6. 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/QZHNC2033070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca5766109c5e9afd16a2006ccc89a612645ddde926de7ae1bd793e7acbd4e7b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEWW42000487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c7172b18aead6b2be09f62c78b07d6983a5d3187ee4c99b515e641c4fa7148. 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/QZMHN2066216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7bc80ddec679d16e3544f3c7e67f6c4aaeb6b8a9c7f4857d391fde34a8f788. 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/GBSMU8454678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bccafd8ae2a0a8c395e0858e4c37c29fa119a1c2cdc82ff9e8f5a4051df2320. 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/QM42K1905400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef71ebb7b04562dcca64fe174a77eeda57e3e7a1999a0a939370e8b129cd45. 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/TCAEY2021848.