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 0x0c3129b362dce9cfa24ef69f24a017a339f0c29629d79bb049677a1bb177b09f. 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/905a42ad-007d-42ee-a21e-69ecfc17f9c4.json and https://artists.proofprofile.net/proofs/artist/905a42ad-007d-42ee-a21e-69ecfc17f9c4.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 0xbbdff5d5c01e72c19f8e69be9cfb9ef7a6f63e71abd9db4c1071d44395b7f1d2. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/INS180242746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88dd333003b7b79f31c718a9cf0c95bcff1bad3be9be51b6198554111095e2a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBSND0900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79346850d64c532ad8c0fccb7bf8a1998b15d23f253020627edb12e8dc2ce217. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CAMF60701468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a81ee8ed47d2fefff82fd5794a8378ffca1939b2a0280acb72756ac1ef20e8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CAMF60701470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeac143eadd70b0f6c749ef9c1ba663d6b6d621c55c9e555a7bdaa3b5e64222e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CAMF60701471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33006d682e9f631e292c7e9ecb97004785bc29244874eade3b6d951d2a21e21a. 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/USA371006791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edddf0afbac1590d880f775380fa19bff63be7aa95b7e7ee677efcb37e0f22e. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/INS471100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2617e782a4e1876b82a0b1d3b2b205594c09d4a27f097bd27c86632158f7b3. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/INS471100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf4b433e37a0954c18b79efc7410913c9f21495ea7097a144e1be2c7f67791. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INS471100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a4138fa1277d2e185d5bf07af7375c00b6259e5a09cdd8fccae998bc2ea637. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/INS471100274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b6a4461742aa2ffd5214477a59afc2da5f5c23c6767426b2dffc4723486586. 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/INS471100277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c463b1f6896f685b7a540b6321aaec202e26e57497aab4378c88497179e50a4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INS471100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb31c22c30c0155589a759907c8c147e8512d609565e337b1f1ffb9c41cb5b8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INS181203971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a259c3ca97390cfe78a1d02ff718eddc10ddeeb10722aa9a27c3663045131d0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/INO132101801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504fed83031da811596f9bbb646db424c8f73367bc105ff29f06135f960e4b45. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INM432500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1081dce87f3b5631a36b26723aa66eece3b8e63ba4d67435755678043168f4. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX872536563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56732d2575dcda7d81768dad9230899b286ddcd207dc93e4c02aff9e2b9b7407. 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/INS180374754.