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 0xc802a4d790775d7f930f533793edc0b973bb43d186c829c20b5332174bcae985. 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/8f3709b6-03ac-4372-886e-7edfc772d547.json and https://artists.proofprofile.net/proofs/artist/8f3709b6-03ac-4372-886e-7edfc772d547.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 0xe445b5b1eb5123be9e2349f96653bbbe73acca654401c3bb151f3202a276bfb1. 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/USHM81572559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d78f9c38eaa09dcb0ccb9d317ff370499a9eb693d1369489113f3d51a0cfe5f. 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/USHM81572560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b5641e91adb1b481194444a6b2e6d09319edc6d88224b214f9ceefbc98a565. 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/USHM81572561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881da673eb92450f6d31ecaa83f42296b0cd4016baba402f3acb8053acfb83bb. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USHM81572563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf308bcd23b2d4000dbf005fe01b949e23d5edfe043662275c5313237eda08e1d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USHM81572565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb16348ce908825ffadc2eb368d872412beefe4066e50d7573362bc8227875. 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/USHM81572566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcac9da99debda0ebcde5dc54ddab71805a81059fd61056f3031e8a1b8cf4b2. 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/USHM81572567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e20d9ee362090bbca25d377bb29e4d7b0009386a7b11ea724f459428c09cd0. 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/USHM81572568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cfc2573718b98a14ed84b8dbec9846a444a344f59c290e0dcdbdc30a537941. 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/USHM81571902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3981f1f953fe7e4ded4085caec389ef1f9a9fa83d5c986616951cf28ce85f6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM81571903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f96601f9caedb924a04d9bf3308c0a0fceecf68e102b198ef5484a05dd57796. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/USHM81571906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c51ecbf2f9f756ba5bb9947edc4e14c1fa7fad5876620b8948407cb67a5aac7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM81571907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cfa05cd286bcb43a0c6cd39d302bb96ad91889cc4bd1acef975a2d7c8be665. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USHM81571908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0bfa147d50ebbc1163e6fe1cef2a349fe26f4077c857ade52b906898610f22. 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/USHM81571911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35346f2d055cd2b34648918b1f97d88bd4fd5a292fd4c27422a750a945590b1. 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/USHM91457806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03446586c96714242232fee675ada8b7c5d8e7cbb0fa56d55f01fc2b25305243. 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/USHM91457808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b598ebda366f3bb6c32c9cf9cc85a875b8e3dc2c1becb5f4d673e9e0a523e2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM91457809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3333298faacca3a431143580a6944ec39dc976eba0abeaeaa0999f4c1e6043. 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/USHM91457811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6637b50707651bff2a869c8fbd10867cf9c74f8da804e6f774287b7a0454c91. 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/USHM91457812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa1082bce5b1b06e4856ef327d66bad5df46d3a2bff25e53b673a301b8f3ef0. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM91471865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa853b2493bee24a28c555a2998f4d71f3ffe1c8727b80ec17030dbaeb25f08ab. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USHM91471866.