Bigwig may refer to: Bigwig (band) Bigwig (Watership Down), a character in the novel Watership Down BIGWIG (library organization), an interest group of the Library Information and Technology Associat
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 0x1ee07673de6539e071f14db678902331ee8d1de99a875b58225be2aa09e83a9a. 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/2b7fc48f-84ea-422c-83c4-e4441233334b.json and https://artists.proofprofile.net/proofs/artist/2b7fc48f-84ea-422c-83c4-e4441233334b.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 0x2be74114a65e06c72babf4914a9bbdd9f79c8dbaa1c2f0569e60c5b40e7ce1e8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US37N0430032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067986146a9ad8e18cea9ac077feac53b67461153cf54e37e41a9fe3e28e0a9e. 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/US37N0430034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff1013900300fc7327956d50c83e6707445277bf9ddf40bc541d2240a9b9f9. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:57:52Z), 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/US37N0430036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b671db5a2c1ca824c3c26079ac4bad5ce50816fc142a0558e5167a9e7f2d69. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/US37N0430037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a24fdfc6c98367999be3f15fac6fd3f8219b1e6ddc26a2bb344fef688014b4f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:19:41Z), 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/US37N0430038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fae0396e40c5ff7ae0e2569c4fa9795024644c8a7f17b8880e87bc346a6a9f6. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/US37N0430039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa6374159e505d58367f1cfc5fd9d7300d55ee963a27a62bca289b518af010a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:43:50Z), 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/US37N0430042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8334d10ba0c768385e91c5069ab5102ab25ed896f9809b042af11f40d3971df6. 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/USKFR0400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986859ebfa6bc0d800aeca3b8a27f576c0becbc7eed8a24ef3f44d1594899a87. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/USKFR0400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33148942462d3666c8d9b8716fec9833b97c1233915d0a6e16d635a5c7db867. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USKFR0400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4ffbda61ee1cc8d6a09d27bdc816b7792ba4bb009d267c5dbee7b412c04d1a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USKFR0400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678c230359aad8dd92f1dc01cf24d5da96777361c5a6d648c273afcf31f3c9a0. 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/USKFR0400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b791882984995d1fe437dee2d17ec24466a035b856bff9e33b7e18eb793574a. 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/USKFR0400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cb7f72e7c1a1553e5c248bc0a35c0a258caa366213e4517566910c2d88083b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USKFR0400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd878c5499305e019d50d05f0f5994af6d32cedc759463794c6b112337bca85e1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USKFR0400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dd069b82d9733c378c7ec1b6cc66c9d78397b526b1c40eb68f49c4f11363a4. 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/USKFR0400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d00b0c09fb1a681686620b4e84fba5bb25e3ed793fa39e104f3046b9ea6f00c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USKFR0400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f45289c6cd35d7d669d6954ba632534a0792e43c03ee2596b14bcb0817eeb9. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USKFR0400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e238fd5ed920a02dc75c1b8a273ffc2bcc9b0634f6b2feec40efe035ca1bad8. 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/USKFR0400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c789e0ab2cdb87efde2ed22d9970b8c0fd083f89f11c69900daad2198eaab86. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US37N0430023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623abf2c3900516424e8bc5a1265c36ac012e370e0adc14b55d77c768a5dd6b7. 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/US37N0430024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed677dc34f2bfc2c7b439e2f1ee83a0b4c28c1e0277155d0816ce4f6219777eb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US37N0430025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ec94980362ea6dadfc5d450fb118e02322508ba05fe8548edd925d53027c9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US37N0430026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9a345b27f35d4a4f3ec317d760b69f134e2e75a1a3c35ce27fdc8c7162602d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US37N0430027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff86fa4a726b52d4db5a6f5740a4b9bc79d3502457bf22e4dd3e9b0dc526ff4f. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/US37N0430028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500ffdef96b682dbe308d9b816de136b191e439fa76766389b387cee923413ce. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:24:46Z), 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/US37N0430029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9eb0e7af0455f43ff848b2a4fc04f838097721f6b6fc295cf37b75ce2ea46a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US37N0430030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb13bbabfaa73fed3a55c2a7f33b161fff89ed815ab445ef902a0ec5726a156. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US37N0430031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e7f43e3ba2daaee609699fa97ff575ba40e2164f36fc9ed23d5556542a1c10. 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/US5260608203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25932778f8ec413e9f5a40b48dea00d203805dc84f32a39ade1967f83b8b0700. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US5260608204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e720d4e88149ebad3486957a30ade9f03e55d754c3373a13cc1b4366e9f25b9. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/US5260608205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61b43f907e06daeace72ca320dd24cda4782d76c8ddfa5b4298a78cfe140cf7. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/US5260608206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf59f82ffddc043805e3992975ed799e289649ba6836c8020ba36bf7c7b5ba2. 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/US5260608207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c5828516892d586585fef9e492908a414c986cf73c432039b2904c06e6e3fa. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/US5260608208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c088193f31d58010a15460d2449a5c69e1734b00ee48933f4b8f920780ea3b2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:47Z), 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/US5260608209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfe1fc6873b3974140db0c5ea0384ba86c16861d5fd4eec29738b0253017db8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US5260608210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c37ae647c1dec424ca796d9b9f0e2ac270d9c9faf022aad129cb440d762995. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US5260608211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa502dcc7c9e97fe50274bf0faf23ce68f1794c4f78cd1bd3e2375af807cda8fc. 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/US5260004404.