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 0xfbf788111653d31b6c0d566d0efe6b1cd6e7dcda3c9f497528113bb5e73ce3d9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab34605e-0a83-45aa-9303-4d532e22bca7.json and https://artists.proofprofile.net/proofs/artist/ab34605e-0a83-45aa-9303-4d532e22bca7.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 0xebc88869518eb1d74ee0bce556f21833242c3acfc6847a856f2a8ed0a86bb575. 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/GBWUL2259693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eed54cc658449c6bbb41e9e91a9e8f9029e82bbfe20c5140b79480a6bdb333. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTV32250777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc88869518eb1d74ee0bce556f21833242c3acfc6847a856f2a8ed0a86bb575. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:35:12Z), 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/GBWUL2259693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2143838592af7a54fbe12f6f55b89771933c20520dcc3de0a4c9d6cdda234214. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2241623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc88869518eb1d74ee0bce556f21833242c3acfc6847a856f2a8ed0a86bb575. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBWUL2259693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54c40a2bfb427ce51734f7469401d0bec902d8c913457c92d16012dc489a416. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDE2240549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eed54cc658449c6bbb41e9e91a9e8f9029e82bbfe20c5140b79480a6bdb333. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTV32250777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6d82f56a77cbe0915824c2511079caee87dc13736a6c98d91a92954da30339. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAAJ2101859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bc8aeb64cb7289bec6c3807e89213b4296ff3a47395455692dd9b91bee62f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDE2240552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb60f3b6c625062e28f737706b3ae95b3787341767d6cd4ea902d0897aa54db2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAAJ2101858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc88869518eb1d74ee0bce556f21833242c3acfc6847a856f2a8ed0a86bb575. 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/GBWUL2259693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54c40a2bfb427ce51734f7469401d0bec902d8c913457c92d16012dc489a416. 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/QZWDE2240549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eed54cc658449c6bbb41e9e91a9e8f9029e82bbfe20c5140b79480a6bdb333. 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/QZTV32250777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6d82f56a77cbe0915824c2511079caee87dc13736a6c98d91a92954da30339. 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/QZAAJ2101859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bc8aeb64cb7289bec6c3807e89213b4296ff3a47395455692dd9b91bee62f2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWDE2240552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2143838592af7a54fbe12f6f55b89771933c20520dcc3de0a4c9d6cdda234214. 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/QZWDD2241623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb60f3b6c625062e28f737706b3ae95b3787341767d6cd4ea902d0897aa54db2. 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/QZAAJ2101858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670acb2b7993cf84fa131ef364d79dd548044f05f62a076539442fbfeae48829. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWV32307750.