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 0x95cf598ee514eca9d932bcf678ba6db3ba804be1c24792f79caece864ec8cbbb. 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/e4ec1479-2202-42c8-9f5d-5e97789447bb.json and https://artists.proofprofile.net/proofs/artist/e4ec1479-2202-42c8-9f5d-5e97789447bb.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 0xb1c8d9425686e7d9591b7aecb3aaacbb77843fdaf6e06fc9433ee6e627972498. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:21:17Z), 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/QM24S1805839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe556012b50255b2860c261e520bb06aa567da77e4fdb3661244dd702415da9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM24S1808061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dbd92662c0fe999135f597174f9534f090752abd56db3e3df34deee2edbdc5. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QM24S1808069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9219c2bce82b59c997f3b1622d50a1b689f2c29f796d103ebc43d4eac01cfe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM24S1811242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f457ba3a7969d5def53869dbe1a894a7ded3a9df559dc8a3f85ff6c5c0b706a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QM24S1818011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9393c0bcc1f48a004c099f63c6a490f87891d7a3b56f06caa631ee8b709d8c. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QM24S1818012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99990cb5a529354063dbb90779664050d68ca4f0e9cf580dbc96a75d8f6d24ef. 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/QM24S1825596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108365929e9877bfa95c3d716846255035782c0dbc9a453034f44df826034ee8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:52Z), 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/QM24S1825597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f9842c9cf3b9d6855a159fa4454bfa84ac783b569eea17c91eb87380f202e3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM24S1841702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843cf16902a594800e63371e2975239d3727b34599ffb073da27376f85db5621. 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/QM24S1846182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd707b2cfc556032616a4529351f8c3828c7363490343f348e3ff8a520746a2c7. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QM24S1903173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196378e1b6f650db83a950ffed02cb97d7d5d1659d6a3ebc1e6dad4cf2f96cd6. 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/USUS12300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802a7e2a5ab58cdbddc45b5c490bea33018eb3d87daaef52d6af5580da8901df. 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/USUS12300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716ee92ec6af26b250171ffc7565ff7b066461ebb26652a6fc640fefc1fea467. 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/USUS12200488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7139ee3b2f670b66f5bc866d54743b7399d77cfeb24a0bd72ce61bb8e4e12e0c. 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/QM24S1802950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e84a5dd76db1b8572dc424e14ee5298c06d96f300356e1099b7d678a3c1aa74. 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/QM42K1789073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794a0ac4f1a587092972dec5a28056cc406b5bdfb9759a9d1a4991d8498618f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM24S1820742.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch