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 0x699464f334f69532e1f88a5f612b11f870d3e999b8b246b4d2fdc357ba725af0. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/540073ea-dbf3-4423-8313-a3558f400a98.json and https://artists.proofprofile.net/proofs/artist/540073ea-dbf3-4423-8313-a3558f400a98.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 0x40dcc0b8a9b5bb9f4d43c07c521b6f204de6604f5e745fd1da8763b9cbdc7ec5. 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/QZHNB2461629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520d7f77bcb5e9261883351194cbb8853c1a29c493414324f3958d84a4ad88bc. 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/QZHNB2461630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fbb8044e420d14076cdd756ef8a82d94aea02831e854b935fe8798d18fa8c1. 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/QZHNB2461631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f1784bd4652ab1cbef715c2f34a70f4e19a8520566d5b47a9a42de40e5a4fa. 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/QZHNB2461633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19588488c15a81fc7df4a0ae53870ac3755f4e1d0b6f6bc1faff0cd978dcea65. 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/QZHNB2461637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc911829f57e3c779466c833ce909650b404cc074ed410800d96582cf7abb19b. 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/QZHNB2461632.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898df4cac04c9eb4f94b1dfb0700c2212474ac09470dd96e892c39eeff316d89. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHNB2461634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f20d7d0a28d1bc3a4db6a5bd29607ea1879d2063120a31e4fd2bd5ca935e25. 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/QZHNB2461635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb4a7551ca5a929bcbd6f03f12e0e126a182727fef92762ad484d7ab1f741ef. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHNB2461636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacdce6c74baeefb9943fbdc455fe315e109af3945c073b1de9e76ae7d207232. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZHN32514999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7853eed4ba62b18ee2f303f09b2ebc87c15d1e0319e691746620fd97145fc7c7. 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/QZWV32473959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121fb708ac21736cd40d2bba5d348ef03afb893daac6a6b9136891e4772f0f4e. 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/QZWV32477479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135b9fba73b773c10b61edc765321d6aff7a7fc8a9e18487e906ce9868ff071f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZWV32477482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0e2867b15d97ed4dfe1bc6d6aa66d9ced30612a8214d6a0d89693f6de5b9e9. 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/QZWV32477484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b3e512aaf43473beeef5f6ef6eabf889b0e37878999cfc08bfa6d8f46db271. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWV32477485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95623f0687cd44ecaa487c18d85eb9ff9224b7d6c3b5760542a041df8a951e. 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/QZWV32477488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774aea8b9f8c8bf9071f014330da3ea6714f693d16b0b60760dd9c5037cc9482. 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/QZWV32477489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30788c5190e5261897738407a0b8c5d2cda8d38e23fe6ea91175599d7b993409. 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/QZWV32477491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8cebf5967355914410fd35311851c40579d228a8b3d4e2e3f748edd1987116. 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/QZWV32477493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71376d7732dfde445d2b6e949ffdcb5b46f0213e769b6fe719be748b372f0d6c. 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/QZWV32477494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab77b71efa80ecc3d67c248aef3c4f2b8053aae099685dce4ff89b53346e6341. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZWV32477486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874ae028494cc1adeb5482dd85773bb4ffcd301360c5d77fc8aefb4244b9f9b5. 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/QZWV32477490.