thumb|right|upright=1.5|True color image of the Trifid Nebula, showing complex gas and plasma structure A nebula (; or nebulas)American Heritage Dictionary of the English Language, Fifth Edition.
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 0x23be6db81c98cef1761fd5e3ebc054ad0b9873ca5e75ae822d4b39bfa880e234. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0d9b799-f569-4b31-a2cd-f1b25b1c6cb1.json and https://artists.proofprofile.net/proofs/artist/c0d9b799-f569-4b31-a2cd-f1b25b1c6cb1.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 0x975908f9ed02b44163497dbe89224ee6eb56187778b22370af5fdac0029caef9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUMEV2533042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05642094c6a8f966d2f7768540f90483cd48f7cbecdcba84d6d7e8f6ce92aa29. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/AUMEV2533043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab7a6830138ad853537d936367cabb004e900cf050ba68a126c9c709a121886. 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/AUMEV2533044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003ab8e70f2dc69a330dc054176afc36ccceaead99e75044d3cbde45ac090b87. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AUMEV2533045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c793eb0b2159f5029611e124d9d867feb20d182cb72ba31c99c53bd762b3514. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AUMEV2533046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1830debebde54bff3b8e5c0e573a7251a8e8de4de8f9cd92e8062d0c0a42cf93. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/AUMEV2533047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e61e2903b91cdbd3faf6b9e103d4280ba50c53d0c7882ef2e60f9d4b384fe77. 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/AUMEV2533048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604d7ef937d1f3655810f5c8ab89e358dc915119316f6fabdb50072669e10709. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/AUMEV2533049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae68a450d5264fc0ba3bdf43e8c09205b26bcbbb3a91180a76eeb4753ad449. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:45Z), 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/AUMEV2533050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563792c5b2525cd5a77eb406387bd14f925d9e1bb117acd46d3eb40f711fdd6f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:41Z), 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/AUMEV2533051.