IHF may stand for: Integration host factor, a bacterial DNA-binding protein International Handball Federation, international governing body of handball Iraqi Handball Federation, governing body of
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 0x852528cde5cb28737c8a3ddf431e2fa6962144dd00fbb2942da5c97552cb2d18. 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/72867445-68a8-4d21-8914-ad5da2cd8308.json and https://artists.proofprofile.net/proofs/artist/72867445-68a8-4d21-8914-ad5da2cd8308.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 0x0d75c8fd83da2c9968a2f64f4fd6fb5461146131428fdefb4cc78c92d93b1fb5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBKPL2091104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d83a25dabcaf6008d0b77507afbfed50231bb10a6534d791c7082703a5c81. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:59:52Z), 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/GBKPL2091103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbed289a0e858c4edf7ae84cf3f12e5584c6e842a7ee3537234d7641ee33539. 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/GBKPL2091106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0ac5277d5b86f504d3ebcf5c29256ab48f1c2b4b33919b6086211b249442c8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:43Z), 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/GBKPL2091107.
Sinking Flares (Inspired by ‘The Outlaw Ocean’ a book by Ian Urbina)
Sinking Flares (Inspired by 'The Outlaw Ocean' a book by Ian Urbina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d257d2a0dfff37274202645a9a375fb1b0ac5dde68c6128cefbedc9738dee2. 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/GBKPL2148815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43b9976c18fa1837c03eabcd6dd10b27b819bb8b36baddd3a0312fbee09f730. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:04Z), 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/GBKPL2141828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fb3f120e79338a5758cedef9d5df81f27d413f4ed6d835377c50515d0d97dd. 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/GBKPL2150732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe19ec3046de80088b64d51a111e86fc2a2e08d23b5afeed7b33b7263d5e0abd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2169917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc33f2b45449cb0bfc40ecd688a02d1ada946dfbd5a83eb8b9a8956a0b78e282. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:40:50Z), 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/GBKPL2286026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b97c04f63eeb549331fa716d524109766db300a3ccedb1e8e58fe452d12e66d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBKPL2294765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48aaabcea57aed7d6c62024d8df8918d2893afa663195a001b7b02b4c6b6f618. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKPL2207581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982a62458caff6a56adc927d2925f01000a301e73a4c0e2e16c0d52ebbd1f429. 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/QM24S1838743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad0244745ddfa7a3906824153d76877753e0e6fa46ddce9a0c2ce16a1a652b2. 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/GBZN81800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f18912bb854e37214bc191d3c4843127717d51769604791e60bb6954790543. 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/USQY51766103.
They Might've Even Loved Me (Re:Imagination)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0781d121d9e9cc629f5b319a2cdff810fe3428c6165f010b4585f46ceb440c45. 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/TCAEC1989824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7345e8a6d17a88aadf2a542d6260b0d6d1cd352e398172b293beced316d5ab67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACP1614741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314ad5c840ebc59bd9780c803df139ec9f5ac1c17869235dd3061a8b1077a68. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/ES8741510106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba11aabefce1091adc7aac9d29b17d76e00da6e3d6b4decea35669e250d88c37. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P1942703.
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 0x832945f918d6d59d71719967d02093770424002ccbdd7a0b557372506b01593e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES8741903108.