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 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 0x09c8bc001748c50ae67e314c2b3ef64d7d0835ecb15cff2bc3eb585154d65215. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/179ef628-68c9-4590-a370-77c1bb0f2f81.json and https://artists.proofprofile.net/proofs/artist/179ef628-68c9-4590-a370-77c1bb0f2f81.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 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 0xaa44e4942bbbf1b3ed098d307bea6fa14f9e02d0213a73056b213dadb3ba3660. 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/SE6XW2323813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd390592106f9b61e8cd5ff1863508fbfc3ac680a3ef354d7ba288da5b1fad34b. 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/USPWN0810739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556bb29a4bcc8dfc458eb41f4e95177bd22f2233b5e571f3df1cd9eb2208858b. 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/USPWN0810741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5707b62ed2b288094c9b7d549e61d94790006774215d19103dcd6cb1730b5e. 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/USPWN0810743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c74f55b7af373c54796635de0479de8cf10b25f705c5c542b9f92e5b9d53a2c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USPWN0810745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00a09a4bce212b77ba8575daa0dbe33538424e9f30b24588c4cc91880b4b05a. 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/USPWN0810751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d197077e582a705841d81a0ba4ad55c6a164db4a14b035db42222883bd458b. 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/USPWN0810753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a99facfb85657a7a8cfa1ff77aae0ce841d2d16062a4697b318512256e9d29. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USPWN0810755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c7c3ea374a715edbf969979a5a16c6c1d13ce923170eb35258db983e429967. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USPWN0810757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e2c7a4f3192ce47764e1228e137e3c6b518883801da668d4df6657cff5dc18. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USPWN0810922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3692807e60abe3121c1c87e5ab55342f06718593ea945763ceecc97c1924a2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USPWN0810925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb005066bc2d0d88b5eb8db8f8ab4ddcc70553352d28408b2e36bc602be75c4ca. 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/USPWN0810928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0ee94dbdd0ba2016b485f6904aa1c9175f3ae5805a4901cfb5ac3347d349f9. 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/USPWN0810930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f241014caa2308e69a3325755c732981200f3be0416fa8e390523ec1b03fcd5. 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/USPWN0810931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bae29739408a5422c4d312df86301936254cfca80fdf6c413e861b7d05f4ca. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USPWN0810933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82f19ec416c1838f6b2e9ffe7464378de54978f112e907c75e239f128831b1c. 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/USPWN0810934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e95658726b8bd4ef543efc07177448e066e1046bd00e89e425a2b3dfbc1843. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USPWN0810935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766d2230b5ad07d437771078d1afa3bb042cb8c54c5feab8722db47696020971. 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/USPWN0810936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84b21d40e90ee82f6633ab4ee5b638293f2e287b6a295c480598d23fd18378. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USPWN0810940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0adf728b55e89b890e20be0e450a11a155a44faae40a0d6162e8f406a126fee. 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/USPWN0810943.