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 0x33b72b4296eba9c3e85a80fb011900e0e976aa0315f4f2a0e94829ea0063d628. 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/b969d611-4286-44bf-86ad-b7c9ae1aa05d.json and https://artists.proofprofile.net/proofs/artist/b969d611-4286-44bf-86ad-b7c9ae1aa05d.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 0x90ec1c9eac461acbad2484be7965bdc587b7591998092d5715e1ce8ec7c11a82. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMEN2308960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf3b49d277bbccc43a643ec85eb25eed3f644745a23eda61a134d8e0325e235. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2388528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd830778538d4e3bdad0a88779b48d5afa23646fba50c7dc3960c2575752bcc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:59:51Z), 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/TLVEM2427344.
I'LL FOLLOW YOU INTO THE DARK (Cover Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7ce6c0e3f41b3a20fdb8be98efdf83949a3c4f4e57e26ebc5990dc07c3a5db. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:58:30Z), 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/QZVEM1841909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63659aff58e78889380c006aa60888e426a7f15ff0da7e67724002baa6d3e876. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:51:57Z), 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/QZPEW2543204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f1bfcd52f713cef308a4c69567ecac9878b35856278b1becc829c612ae71e4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZVEM2555511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587dbbdb035139aaacfd7f5b8a38b38b3afaacd6715ef611d70490c298bc5e89. 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/QT4K32525025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1316e2aeed0f556a68dcdde4578fbb7cd801035ebaeab11524688a08d14e0894. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:55Z), 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/QT4K32571952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90f103ebed623e47c090ce69e3c7db107dfb393d5c3b223e17069dd19334e79. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4K52560737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05b8a6c9a441dfca4f20a1feb1d64f31ec852ea965d00387a3214d4f217e4d1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QT4K42543016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66dd48e6c5da2b5323f4b16c0f37e62498881e7d5772ca3f106ddd116a6ff11. 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/QZTAW2371546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf070a6c04845a8d2799ba9eb1893c6b5995f571781232aa01b488030fe22b30b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCACS1642196.
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 0xfc94ce32ae890c6e2cbb3678e81f6f453fc1e2a240a7f8355388165c1e61dfab. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCACS1642204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5742c0fbfebf52414e53a7366ad7480e40d888d55fe106448b7874dd932188. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCACS1642221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832cca1e98f2de593931ab3f219b93ac4731a68340f34acb24578171cdf61d68. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCACS1642222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ebdcb530a5b90f79cd1d4a21003d7dcdb55a32fc1444bed4ed89de1140f740. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCACS1642227.