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 0x9e37ff12e70c5b8ac44c36be9e29e8772e01240071e8557765e451aafa548b8d. 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/6eae7453-9796-4549-84cb-edeae4f33436.json and https://artists.proofprofile.net/proofs/artist/6eae7453-9796-4549-84cb-edeae4f33436.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 0x2312692c70325c628cbf529f8fd6483a789d57fcba4ae15b9446ce6b993b9700. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2B1702901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb976595763fdbb86eb27297abbbda171f4c5767ac55dbf5bedf974c084f382. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2B1702905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f4a11cde5c8e3103cdc55ffb0fdfcb3b88eb49d0d78a24d7324d4b94a87c8f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2B2056580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32292d6458c259bb46065e96a4e396d8fb2a99534206817fd1f12d1c27be6780. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA2B2405330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32292d6458c259bb46065e96a4e396d8fb2a99534206817fd1f12d1c27be6780. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA2B2405330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25e88edde377e1e5423b3735c85e36909847be7e605c50e27b3a964cee345d5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2B2405331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5dc3aa15bd2f79be5f9984162786d0151839fcb439b0a8807980c53900783e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USA2B2405332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7260871d848e712f34bc8fc21e1583d29e4e410c034fd713ff681e1de33d6af5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USA2B2405333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d06d8ba9f89f7e3bf9b5b25c756b1bc795e4abf0a5cc3d389fe2100a0e03161. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA2B2405334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7716687dbeb3145285ed8054815ddfe5821c7c4020ca43c7b63db7b36374d5. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:02Z), 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/USA2B2405335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e53a603623c5a744d33210149fce99ec1099b06e6d4dccfd6ad2b0d7f89c0e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:33:54Z), 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/USA2B2405336.