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 0x649d41533f3dad9a8cbb85cd31d7e315535fcfcb7aca5d3cc09fb65f5ce0fe64. 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/TWAN78000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ad9730f4cc9ee4ae7152fe7da39a129b7b87f02500162ae7728088b6424b6a. 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/TWAN78000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76da0c767597ed51b552897aa7f0ff32103325cce1e45df8df1efb5a7f8bfed. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TWAN78000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79b33befaf9867b1f3ec6157147ce5a79fdd82a9d92f867a7175c9501ca0ff3. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TWAN78000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440cdcebabb5df946df8f18b96ffded230c82feb522805b0f278f42ba4614ccd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWAN78000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f24007a194c5861496c2f1f10f894869080f899f9227355e975e2f9825d6af. 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/TWAN78000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f46dc7d8c4ad2f0693dfc5064c1f4c3ba2c0d86ca7dd943e2b1c370e4c9b190. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWAN78000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ff37acb4311f147f8a8bb0d56caba8af64870adecbf923337d7c5a85147504. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWAN78000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0fdfa71b7b3bd5426424d2ad7ccac5b1aabc7b67d3dd837d13f64211421c1a. 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/TWAN78000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a1fe9c7812f6723da4be147abd5887878a06e0d80903049bc594526d671cfb. 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/TWAN78000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ef3f2158d8f9b7a668f252dd3a70bc89e46f08b8f7985487a92cace44dcad2. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/TWAN78000012.