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 0x49938ff107eeec656e1dbf7890fba5cc495f44e6a0ed8806916d98fc0b2ddcba. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dc3d076-8d2f-4e06-b961-1c5cd9d12daa.json and https://artists.proofprofile.net/proofs/artist/7dc3d076-8d2f-4e06-b961-1c5cd9d12daa.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 0x5cdafe9b75d7421284755470590b0cebfcad9ff3e861bdb0f4a5c776cc3ef32e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH7811605586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118ce6115df7b39147aa3d31e7cd4442286a254f4a7dd6a4ca05347795674588. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH7811605590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb895250467c327563ed476cf515c367e24b4b4eb461d8850c07ba15def619071. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH7811605591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e6b441b0d41635c88ecad0865b88976fc03cfff9e0094990c8dd7528503983. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CH7812370959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d829ebd05801b0ecd63e2f6d7868562a3c7997721683a53ffadb506764bc0a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CH7812416586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8918da01a0ab040c350696969c6cea362c00f5cb7b4b101ce0bf0a124e041. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/CH7812414098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21660bc9714ddc15818dcfa514497452a68cfa595d60129d3b0ac8828311846. 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/QZMEM2354760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4003ecf46d8cb2d45cce58c47c48ac8246fd955690597bedbfcae2a8f6c297fb. 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/CH7811820486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84f0f3b32145b4d252604d39d93d1742e144dac2508481b57ffa29df6724e09. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CH7812416794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7df6f62f4f73be91f574efef41101a23271f6bf2017b3ab5e32dc55aa22d3b. 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/CH4101405511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaa19b7f6bd2077d52241d51c91a108467fdddb813024ae8a031f7f9ca77f9a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CH4101405514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cb9d2fa5edbb4e350430244e5b5540cd84be48d8b635d906407521ab73559f. 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/CH4101405523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8598459f0a5f1412323f0c89903b6706c9067319c31e2fe64091c95110f9ab. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CH4101405526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba26859bc4fa6c8ba114869c1a1ed00051456a761160e2831ea3120b17567822. 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/CH4101405529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995169d9e8e229940017714f2c2b4a18f8ebeadfe83fdf4bfa65c3b07e0bbbf3. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CH4101405531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5609538b113f539eec983410eb201301604a94e789ee5bb6eb883c98927159c. 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/CH4101405533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d5261c63537d9c041389c220f4e3c00166f299c1eeecc0f755ae8e624a1ef4. 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/CH4101405534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f625020fcae0cf5dd2659ac5d49d236418b331ad479dc660413c9c66b9f78ac. 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/CH7812233493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0246efe8390fc2fd1e8e4f4beeb0bf415e5d35cea3d12dcb8cf4047c019662b5. 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/CH7812351830.