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 0x21bb9b9381a9a626e491f325bcbecc18492049de09f526b4ac9cdfa3656cf072. 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/8bcc6e02-e6c7-475b-9cc4-3ae252e6ac18.json and https://artists.proofprofile.net/proofs/artist/8bcc6e02-e6c7-475b-9cc4-3ae252e6ac18.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 0x06579b1a6cd26711efeaa12e07a37d2738b11e083809b1cbd7434e1cae48c074. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZFYZ2186867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2eab8b8148fe099f09fb7629ebe397058dab5363cac3c08c39c3520252220e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZMEP2351633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba03a791f9f07123f8b3c0454c8903b9f4bbf94056ea2277832ff2ca9768c1b. 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/QZNWS2374061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd308e62c1ac93bb0dedef415f67c18c843c55b79af421772634b42a8ee6f665. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:58:32Z), 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/QZNWX2321117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409a8b4db01709b75762d196c4cd092223f6153c3cfcfdb22d9f9fd936665a9b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTAW2375496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751668d01950f8613bd9cf2c97017bde8a87f88ac89a809a2a7df78955bb18e6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USZXT2352470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3aae3012e6d209088995ea681451ac90f85e14ba763e32e7fd5e93ae9afc15. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTBF2320551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b10ecbf2b3b346c21d99d6b516a46b91fc8cbfc27803ef4472065724edf49f6. 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/QZTB92349592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f6b1d9f8f3a5002d64b52efc542ce198ada5a83d13d946d75671143b017289. 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/QZHN62465882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc14069033cf4befc370a2150a3b119a6ed5d9c09637a2905f692e10595e57. 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/QZES92461790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258ed2d26384285a219094cfc9fb0b9bfd737c0dfd364f9fc83334139ec1da4e. 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/QZHN42454683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691d53bb94e75e84633c2975b68e010a2ce0d4d0f9a8703870aa268069b5f67. 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/QZNB82458393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc14069033cf4befc370a2150a3b119a6ed5d9c09637a2905f692e10595e57. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZES92461790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2171607081e6b87827eef28a995cea44c80cc9e9f9df1a8d9318d77fc551c. 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/QZDA62422896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250cb1f54607e7afaf13b6dba76aa479a4a59154a61fc79c662f0ad8ee6fd66. 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/QZSYP2301604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a262984b04a356121f2f4cbed58906bce3086876007bb5f9bb9d5472800b74. 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/QZFYX2434520.