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 0xd51b11ac37f2840789b3133e6430d53c101dae05a2fccfe4b07c4eab60e9d995. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61810095-a145-4482-822b-397ed9744f6a.json and https://artists.proofprofile.net/proofs/artist/61810095-a145-4482-822b-397ed9744f6a.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 0x9fe56ed2ee01e26da9c9c4ea0cde7e64b98e7f38d22cdc4d004ab6ff3cf776ac. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX202156810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d8b46de25e96c8eb4e229d4fef8cfda3083a7819d944b8e04bf61f1fef796f. 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/FRX202156811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739d949504f73b20d8c5d86498a7dc396e062227bd7336bd73bbcf4b10f8f1a1. 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/FRX202156812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc523dd66fcadec3884cf47bfd46fe7ad55337719d51a5bd89226654afbbfa165. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FRX202156813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38fbdd09ce251432be39f56fb185a9a93a1fd970aba2d1b9fde10eb5a74cc38. 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/FRX202156814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e67af2f75a50d9a59f712be04a45d51af29a9e98faa11799f16356b7a30276. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FRX202156815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45f22549e12a8f170625be84c9aff69c96b3c7876920575540d1d3761a61971. 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/FRX202156816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4fc47a7db573663c5f1b12bd8e2b42e31ed433d382a53f76e85eba9d5f3446. 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/FRX202156817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802166317d6b4273084b8f9ebf2100dc30a19a76261f4a87086bdd05c4d2462f. 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/FRX202156818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0a6b537bb7f8c12d69acb7eda34712785990b3b3ea9409a659d3a87e5ba7de. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FRX202156819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eda33a28ecd1fe1f5cc7e10df1db7c9f33d709e87dc107bf95608b966db4464. 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/FRX202156820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2668c662bee81dce47636c74809aa3997cea9e4493e9d97e82159cf398eba241. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRX202156821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c622dd129fcc05bb391b19ad5e87a84a07ab9dc3eadff0bbe6c1a52913f079. 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/FRX202156822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69d582e13c8259cb43c835114f8209ec97e7998a61bd99ec2eb8b3a153c77b7. 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/FRX202156823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711d8b21dd2d4ebdc81735521192284ca88c9e9e6877c54abf71a2a9c1d82255. 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/FRX202156824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe480003120e7d7c9678518cb9b190fb7de4c949615dd656f1a1cf381a3ebd5. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRX202156825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4fd34f0f33554085929b3fa8801707d547a6aedfe80c9785915b9ae5b713bc. 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/FR10S2470670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587b31afda8a33637de7fba8837806a752ca7c65a3b4992c0f800eeeba711c67. 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/FR59R2184520.