AK or A.K. may refer to: Arts and entertainment A.K. (film), a 1985 film directed by Chris Marker AK (radio program), a weekly program produced by Alaska Public Radio Network from 2003 to 2008, lat
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 0x9fb610f7b54e652afc1171138dd7b3cd19e8c38e620c6064c5754114007a48a3. 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/b14374c5-6608-41d1-8ea4-c802a09a978e.json and https://artists.proofprofile.net/proofs/artist/b14374c5-6608-41d1-8ea4-c802a09a978e.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 0x165415ad0bbddeda13012d9a10f004176fa9ed6ec10970abf8d022c575a02cd6. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USHM92023891.
Listen To My Heart (Mini-Mashup) [feat. Binnie Marwa]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6ecbe342f54aad632285e0cf1a7dddd0348e8b19d9ed8d6dcb161f3f7fdc31. 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/USHM81948982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08c5ed06a723e05afa34028009c09b79ced99fbbb7b23f3edcbd411d1871b92. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USHM81948981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03db96b14b4f1d596ebc6bd98eee87ff7b85a932bf6312d9956e582b3c144d9. 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/USHM82098458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d197fc7f63f71bd1fc7994d1f163d7fae62c1711c53ae8f6587d4679235c48. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USX9P2032039.
Goli Jatt Ne Kacheri Ch Chaloni (feat. Labh Janjua)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda91699918ded8835685c66edf2a63d0c7a61866f77b64e893ef0f8c8d1c2345. 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/USHM82192338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e9b6a8c50efa104da3bde3ebe1ded4aa618a51c36f2e803b71576f1411c896. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USHM82192342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa034e699bd1d17006ebd6b621f8a4167fb1180eafcf341c602d83bc1275a5c97. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USL4Q2196596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a044df16b4d9cbca2d80edbd337b169f6762218a0bfc7e77800e40f100c350f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USL4Q2228971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1471b2cffca750d4e5a5a851755b5b66e6284f0b486d14d2b33c61e5eb362b0a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGH2323551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639743b86f569ec93db75dd3d4710a0cb1441ad20d03ff8f7d47e022fe0ac971. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USCGJ2319019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482807bad94416dcf4a49131297c01aae690fc3d6475d2a1179dba28496d39b0. 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/USUYG1498263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7305ef38f66b84757f8da28264627755e989d26fa4cf9d220e12c7fbbb9bbaa1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USUYG1498264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf320fd6a4b7f709d567ba8c886436011b58f8c3c07e35870b370a64b1bb913bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1498265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5af3bcfbeaa359641878274752df2d27b4d3e88c69d34a2a3697bd6aba4bb7. 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/USUYG1498266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8bef14c73589046e9e2cf4234f88209f88bccbf446403324d015054da0bcc4. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USUYG1498268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55907f0e660ac78dfceb1dfe6c6713f3ba42c737df5bacfcb085d545dfc65378. 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/USUYG1498269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edc3ab21755955ab56c875dfd2ca6ad93181de7ed7573d5fbb046a2496ccbe5. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USUYG1498270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaff6281982fda8c0bdaf1660a2a82dac003ad956e5cb25ea6fc3d0786e6808e. 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/USUYG1498271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54247e0deae0421d85fec6ee91d95aeb3331bf040bd8a85aa3f663f13a5d9bb9. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USUYG1507594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8f41c04752cb4de1f12478a4e7b8f3ed8526ab01d2f281986a3bc19e3248f9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USUYG1531867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4caf8be7a43b910db1d5034e72997d776a5e4d92b27545a548fb9b52e2fa98. 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/USUYG1531870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c56534902207c177109988325be007e9e442a9654444fceac109c80b4e3d22. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1561076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002d49f65194a55c5520d98cffb0ec344abe4d277f9073dcbab2c884fa44a5f7. 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/USUYG1561077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36714fba28f1ba49bc0a9a0f8c1f18961755d34fb9fb8000aefb10e83e718f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1561078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb25b4e1bf496e7b2509be3ae5eba16880c406e02dbb869f4963a9ddfa95c6f. 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/USUYG1561079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c9216aecf00178613fe7c35321c8b24f3a76845241cc6a07a3896fe00175e7. 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/USUYG1561080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d086b906dacdc50083a384278e3b64e314599497e4ed019396d80e8317c76b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USUYG1561081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4ac7dd70c11867cab8e756254993e14cf0770b44f6b0169e343f6093232891. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US38Y2500611.