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 0x981fd0df02c02b5816d4c2b0940fe9de8c22d0dd0a0bbfba80c5e18d8bbf8503. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f10eba46-2a33-4f6e-8a31-83105a523a00.json and https://artists.proofprofile.net/proofs/artist/f10eba46-2a33-4f6e-8a31-83105a523a00.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 0x3097cec55e8a6542ab48d676befbe7a90cc8a0dbfb2d6c5cb54c13a6fd71baf9. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZES52355035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405d13494da894b97e9f5179df992572b7e02f9514cc87d354f6773deabd773d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES52355036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8451a72e2fd1dbe42c83f17f12b50145a0703efd859543018d995ee158bdebd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR9W12342980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c533b95f61aa45849de7e8d23613ed0be985a06669c41edf5df67e786a64cbc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR9W12358302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f36b20ef9d9b233092ce79334c666f8f46b2d1c73df93f1599efb298f7a41f5. 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/QZES52400822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01644c4cce30c852450031fcaf0d03435800b747384fd78f5a9ca30e06c40047. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZES52400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b05fbafdd18c8823390dd73995c64c46846a556109fa8fb8ba481de3ca7cab. 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/QZES52400828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcfc8a5a21636449951167e01cb1940b3e5fb26dc1356809b4984cc4b9f52de. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:55:07Z), 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/QZZ782423375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d71a0ddeb0afe1f5fe2e69af39c5536925e4b5840ce4603f703581fa9b81e2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ782424715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03029ddaac0a62388f1470d5c9462e3132924313db993f8cd0e4d474bfcc821. 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/QZZ782424716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96484372d19aa728dbdd7f9b1e9b22d6757e5d3dfbb8a9db7ad771d4b4454ea. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZZ782424717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451622d8f4fbc78d9c1ec42acf57d941957891612bfba78fa96babece777447d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:36Z), 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/QZZ782424719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e7941c16a345a9c0b971b67857d0187b6f3110076fb06c9be3d199c32c78cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ782424720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7bec90a6913aeb2380aea0151cbd29391416bab3263eaca9c67af7af3193d3. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/QZK6Q2548422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa44717ee59e95cd9cbebfbc50d9c8d46259706e70d0a771a584d6d00ba762b. 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/QZNWV2309495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316592d82b70cb0fd343e14c0d918439168dc723a092790b918c60145a5e63b1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:25:34Z), 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/QZNWZ2488351.
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 0x1d07295062c45d085939fdf27769cb3dc210bcd689c8065f0425bf5327bd8cb1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZNWT2255647.