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 0xb92a200cbee5b452fd3ca2332d50e4128ffb35073c61a708b3913f96736eed5e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5162fd42-b3d2-4a63-ae0b-a93466a2fcfe.json and https://artists.proofprofile.net/proofs/artist/5162fd42-b3d2-4a63-ae0b-a93466a2fcfe.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 0x36d7461039c984683b36567d030873c33f8f968e0c4e2a143405d295754775e5. 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/GBKQU2321688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36721922255f24c7469a53702d897faaef9765c2f93e03c2b611711d7a8913e. 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/GBKQU2348421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bc9297ec983bd1ebd727c425215a43f3cb48b9e9d64a8a5a06297c6651445c. 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/GBLV62214173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa580280c50d71496c055bb6970fba1be04775630cd7f6e793896b1e4a112e6. 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/GBLV62301386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa774b452dad6717344720d8e08b82c131b2fe4c19ec7359d10e618a02df204fb. 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/GBKQU2331575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caa3158b659c2366996875c6080ea4ee558b3a7889856e83db64e3cd37d2a0e. 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/GBKQU2312418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac263683bf44e9fb59311aa3764f38a5ce5291b6f69585ecd88a8c9547c4315. 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/GBKQU2322676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1071b0765fcac6890082ef5371601b605f26b3de59ac9322fa3d547b65faf6f. 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/GBKQU2338396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8199d30bbc9dfd4b9db054478927a61cd8d9ac3e4e16b7510ec8e893e74ff4. 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/GBLV62214170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cade7343379f059eb1a16207fa4e4c4ed5f1346d62e7857c9d20b205e55459. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKQU2312693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9536e528b8dba06d8d37b6256ee9fed4d0e25a45bb579ad0b49a94b2bd1716e5. 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/GBKQU2352041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8943a9481454689b03d201554a4c63ce247ddf160b593da622182e99661a6477. 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/GBKQU2383091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbd8577e3ec10cd6f2d1520df209e045011f0f9fe93a50518a70d3cfdac699f. 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/GBKQU2339451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00cb7ff2a9e66bffec26f2b04b6d239dc10d5df4d0cf5c78d82d86cf58574e5. 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/GBKQU2316910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e8cec161bc71e578d15d4dc09b93910e02e24ca2e8f8106d7bc1a7e12e9756. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2368927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9191ff146fdf8b211432e90c2f8061e25039b0b6ec4ef6ae7a654cbf53e3c7. 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/GBKQU2373266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d6e3c641e467ab285b47e8ac981e6f067b81e0516ee45a1dbf17afafe3f80e. 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/GBKQU2396873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae36c81e39becde00f2f3653d6659b10762ca81ada2d2441d8324e84c91b74b. 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/GBLV62300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86c6f6703968590b4e44116e81fb11aa205ca71a9411543a3b1ed8eff78bc90. 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/GBKQU2323972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2f78f58394497fdc855a4a56f54daeb36c9d0ebf28080a4ed31a1d2f8c7f9e. 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/GBKQU2369540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91701fe5aebb5a5c2bc508e9b66b4e4328ca9d65255cfc8d347e30ed894ef59. 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/GBKQU2378492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef7d5b4b6bae234ec2532de492fbaa75af2d3ce6c0699a43f377457ed6473e. 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/GBLV62310924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe81d950c541e23c52cb751c025bb9d46428756f5d8ecf697359fef7323cee9c. 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/GBKQU2369538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993c7adb2117ecfb51eb96006e38ccceed3d831147b1f6165c1aa6e41f0a14f0. 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/GBKQU2375892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4761460f2df9de9fd9b592109aa2fea905d3b7578197f2e2cf6c5afdff2dba39. 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/GBKQU2378486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db3300c53e50a93612fe12691097002bafb98b43b81a7a9b85d7f9648d1788. 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/GBKQU2380607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058418fe581352588e160ac47029118315833651c8bda4978f10956fa3753522. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKQU2396876.