thumb|right|McEntire performing in 2016 Heather "H.C." McEntire is an American folk musician from Durham, North Carolina. History McEntire began her career in the band Mount Moriah. McEntire release
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 0x8504b3562f1bdf5e39192242f6ad8a095833b479fa7ec595761b37e5915d35b8. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/367538e7-1691-4354-8a4f-10d05b7d90d4.json and https://artists.proofprofile.net/proofs/artist/367538e7-1691-4354-8a4f-10d05b7d90d4.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 0x256d50ebe0516ba09ec547ce8cdbad3b971a523ab323a97b2304c0e88a94fb0b. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/USMRG1960221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dea2d7906d4f2d03ace4fc0e67e87653a6e3ed68bed6e7d24f7f75eb879300b. 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/USMRG2072203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b3d5d231b82e11d6a0e8bda00de64a2a41c8ad43e905ac549fddfccccf157b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USMRG2072204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5988342924d645572d166f531d4c46d983582f433d11335a4cad7c31e53fbf5f. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:13Z), 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/USMRG2072206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d8c21274c59965fa6b31460fd5d367ac21b53fb987acd952f18c1a10f665d. 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/USMRG2380201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fffaf8d7bdb210d44083fd8c84aa52d715e2ea1306179378732d1b75069d64. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USMRG2380202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968e8ed6053c87c97eedbbc05eb7fb747f60a0e95336dcef2af427b37969a9ed. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMRG2380203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91e0931b3c813d154847a95f63f55e71f8db698fd987d5bfa0cfa665f438525. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USMRG2380204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96056a73c1f21451437c2d69f34261f7c5047169af1eef81cdf4ebe307b170a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USMRG2380205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f17d80915ededa3691ed51a894f17f1e52a08f40967eec75d6c50cb813de77f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USMRG2380207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbe24a36bec0a5c5d41bd136d08aca5ba22f401acc32ce8c219cf6b34b5ef87. 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/USMRG2380208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48d51721564978772e8231ee81a3521e39a9e00ade682dc8cbd4f71a917d20c. 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/USMRG2380209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad6e919ab2f9189321274a2be77e6ac797ccb474abf98a2b994e8f883830c56. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA341490597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024c6e94ab0b8d8d90e78e8b91a7c14c074214289f17715311f967476d95e595. 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/USA341490598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6e85659de56aed5c8f3f2757d78fb6f90c064bee9aa55b8bab498f0429b443. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA341490602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa269c7365f092c3fb81c7ccb97ea306d87c8788c3614cdcf6e16e7767a4de8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA342290649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5524d306f778f602997d826ac7f496363d8b58b17e0ebbe6c8522c52ee8288. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USY6C2135109.
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 0x3c77e289a205ae34acd7709451c2b5c7e3e377abda5ceb2b41081aa4382ffd9c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USY6C2135110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712980d6c44ed855560fd3080bcb9cb1a9db1c00c44294a1b1e750c424715158. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USY6C2135111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcefc5efd5f9b881d4b5b1bcf61dfe97526eaddc49e4e83136e5f7b27e4ec17. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USY6C2135113.