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 0x6afb8dd33480701a94b38e2f832ec24364630d17ad0a7270541832d7c60463e8. 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/e9e26bf6-6836-4a33-a4d5-8e0bc1e62235.json and https://artists.proofprofile.net/proofs/artist/e9e26bf6-6836-4a33-a4d5-8e0bc1e62235.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 0xc2d9ea27a98958c99a61b1031da5b121e1bd31c85568d418c4c39ca81ef32358. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZHN52017471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca6fd89e8673773169e62f31c79b6fb896ebb317f24782d3b643a184a8311bb. 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/QZHN52017475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2d1ddc0fc4d3a51c8f7b8a4590d952cf6e0ca460ff32258be8c743a3a2a413. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN52017481.
You've Never Heard It Like This!, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9b4eb039f949ebdff07cceb35f87656eec06b987bcb4a916972d84c1a06b6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA42143898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34300b7b18f2638288ed55cc2139994dca81ddc7859d49c36c25b7d1145cd83d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZDA42143900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa8f58d035df21a3205913cc966a25e4728ed0296858d80afaf45115f29b966. 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/QZDA42143908.
You've Never Heard It Like This!, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd39655ef0f04c0453106a763ab4adf23d1279bf83a863f3662d9dcb653ab4a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNB2136754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e96d7e5748523e07949d5a37fa36daf50dee9f9e35e0e545e81bf5a4440d3c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZHNB2136755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe99b2f72346a40fff78c4394de31448cfb857f89db97dcb93b8983416cfa84. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHNB2136756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8363c79e7c1b886f7fba0d8bbd9918e99cdfe42c57f8095df4077186b8bef644. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZHNB2136758.
You've Never Heard It Like This!, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd739c7e40418aa1f0a36cc699db1943edb0a3a23a3c3dcd045091e058d98316. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZPLS2152018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d9a7670e6a31d3ad6a685156959010838b215f304b2a9691f5a1316b3b2ce5. 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/QZPLS2152020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b98fb3116ba4a3d2c5fbda56a7f3ac0e828a30bb78d492b6a76727539a1f74. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZPLS2152026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c14ec3d3ba5999022e71dc3a3ba45286051786d22bf2d76898e771275d572a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUH3Y2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ea76d69d00c33c3e5925003b332f90a49752f47df6718f66c8006f27617b3e. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/AUH3Y2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1e25d40f5139b10e5281647bcea0da83ff5b107d5bb40aa6b891ca01525eac. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUH3Y2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b348d6c53b86b33ea143f891200d5f9fd1c5f526c6072797cbe44e87cbba887. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFP2579122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735134bf422dbc6f84bd82e7e915073b9ac2da872ea6887ae33bc8a303357c94. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFP2579134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2868e6fabc534351125516c72a328247e951b767ab00cf08ddc016eca09c8f30. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFP2579306.