thumb|upright=1.35|US artillerymen test fire an M777 Lightweight 155-millimeter Howitzer at Marine Corps Air Ground Combat Center Twentynine Palms (2005) Artillery consists of ranged weapons that lau
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 0x6b2655de67d68d8a0c180d0d23b29a07f09f733794f4397f688729c5151642ca. 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/21dfc08b-dc85-43ff-9c18-f6bf5b6eb12c.json and https://artists.proofprofile.net/proofs/artist/21dfc08b-dc85-43ff-9c18-f6bf5b6eb12c.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 0x0ce9224690bba030779fec03f7f0ea14877bec28397e5cd5647a74301fb0d35c. 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/USMBR2114695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3e570d2c8463d0822cd9661c0bea3b825699a82bf8abb92b3f93c983572a06. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USMBR2114696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c71dcb1c6e30739ddce47ee620061a9ee6db7ebfed436b0b5d608aefc54e8a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKQ4A1937502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c88b41ad5139be2dde20bbdd7de1c43e6fafb856e06370ef6646bd9dbd2fa02. 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/DKQ4A1937503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb01c1cbe498665e3e913903c58d407d571c82ac8ee4b781a7829116475f192. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USMBR1813272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1a3aab4a594077e83341fb28e327aa3611abbd0adb7ee99678be2cc3f61a4d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USMBR1511592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6811b183b73877b22c842d63a9cc72cc2e73e31f308f05a0154e67ef6b4233. 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/USMBR1511591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070d016adbb1b04ee13b62029423ca8fb9903191e93acf0b853cbbf0b7d8ffea. 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/PLA641409593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fcd6af45c86dfe70edc68cb2ed4922081d4415376ade3a91e2194240c6d83b. 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/PLA641409594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e833e53e22fd61fed83c9b0fb69702fccb01d3bcacb3298e5295fb42bbc552. 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/PLA641409595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6ef5033e3ba83a342e139a0943d98b228a51c929aac7a4b356d8406d3be3e6. 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/PLA641409598.
One Foot In The Grave The Other One In The Trash
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe143290344b1f7167e8d8d027435e8dbbd65ce7535aa2d83154eea994c59ff7f. 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/NLA321400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa864989e643f2dd3a7c58a8dc7d55c81ac68328c5f51ba0dbe0b13e21891c795. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLA321400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91677d0e991a6c1646db60cf4fcaaf798966a95035168c2ef47feb5fb40d9460. 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/NLA321400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5400128d161634b3c4d7dee5af9a19faf8efd0dd94d3921d444bd6a36629a29. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLA321400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f61f8e0a54eccc6f16607be91d93538e8a8122996127bd0c80653039f3033e. 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/NLA321400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1d20a471c2dc49536daf569ff3fd67808cced13bc4d394bf28f5afffcf54bc. 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/NLA321400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1a776bb94b36c35472ce14033dfbbe606b9320f8c5d2a90e2375567ccd70b9. 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/NLA321400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae1d8fc8ae897ec820e2da69024a45a148852bb30ccab35eea75908951e1826. 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/NLA321400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614d543e0d4fb251de6b2f4523a9e358c5eb519e833a724bcdad7705208aab5d. 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/NLA321400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef44bdd172d6398f948258bdfbb6d25c1eb7b1b66608eb37e1744f6c526ab98. 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/NLA321400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89da7e5d55a9c4efa83d4f014d0d63c03857ab3263fd78341342becbcca307f9. 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/DK9P51500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a80e7b02d79e83613636e5c5092a1289ca89a04dab469cfd63f500bfaba1b. 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/DK9P51500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a99937592788485bd2f7d1df953b3d8647c914f4a4637b373c70ba59d1fb1cb. 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/DK9P51500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e1a58359559d44481dfff8af85c5468b5c18535c0119c46e7d1cf9f4edbb3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:08:40Z), 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/DK9P51500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370a0dfffe356032fe6c2387175458b4e2f940529a09e16fe525c2dcc58d781c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:09:01Z), 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/DK9P51500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97beec8af62bec7ebc4810f50320c03f19b050e27f62cd72e81cbc39c7ccb4e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:43:39Z), 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/DK9P51500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11c1f42114cfbc02ffcae46e0b04fbdf0e2d0871218a27708f656faba6204bb. 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/DK9P51500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9581402594a99be9ce94ea5ed1a0dd23a0f03db7e16e1816daeb5fe0c86b9b8d. 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/DK9P51500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5491db98820b81a4d9bba0fb41af41257a0fc12f133651f08b0e57255af578. 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/DK9P51500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6604319183c9d46485d8e9e431ab150e8b4e147f42ad50735fbc1e2ae59fc8f6. 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/DK9P51500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad28e9f88ef80cf529511f6b6fe6bdc22ae1a66e299a6e3dba17113acf5688c0. 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/DK9P51500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b5b0a0b126c3f8f514ed47a301d252015184b72a1146699a91f42de109e271. 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/DK9P51500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe364e599d37f0af9b325d3cf08464ada1715a92f8ac6df947632da6e9b255474. 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/DK9P51500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8942ebc9f7d1efed38a774b9bc8b2f76f737ce374cc63e170f9401fa80b06e24. 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/DK9P51500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f26fa213d26c6b3c1c17a0efa15bdccd1cbde5047e571dc28dafd370f7a9701. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:07:57Z), 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/DK9P51500109.