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 0xd460865bbaad97603381101ab793efa92b2049095f9c96de2ca8f6145f051827. 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/724d5157-dacf-4e79-9fce-a7975919cef0.json and https://artists.proofprofile.net/proofs/artist/724d5157-dacf-4e79-9fce-a7975919cef0.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 0x375485157dc884fe212dcf42b71e4d0e339740da2c2671b482f5a0d36998c7ef. 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/QZES52219425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034219b54f2ffdce07bebf2e425c0611d880c4970eb543f2b052377859840196. 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/QZK6N2228579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf91fc71305ae249d255c1492cbb1c1e3539903dbb4c722bb709bd57c046afb. 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/QZHN42287365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dccccbd1292fb5c489e74c246cc3b6ceb36032125211ef10411f0e2f221ffd. 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/QZK6N2228580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de447f4b4c84f207a5da831f0ba3810d729fd6ff141a2cdb41430d1d22e761f. 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/QZK6N2228581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540d65ee336bfbded960e727d9844d1169a556a2f14d150ea062aa795d3aec2f. 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/QZK6N2228582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a31e9ff4d90c8d78ad530e8c799f6d99eb900934d70fb81743cff3b0087d90f. 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/QZDA72281258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2402a1fc1b80dc23a91b84c65f69249cf63ef99c0797216f963b7a9c5befc5. 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/QZK6N2228583.
Running Up That Hill (Stranger Things Lofi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df902c4dbd0813a02d6160b93cf09fc0dae914d30ea5ca401c04fb744b4ec9. 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/QZK6H2294538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ac4f68ddbbab3f3cdf462f9fb05d45e1eaeaff2985445e0507df56d93cc76. 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/QZDA82348993.
Story of the Stolen Spirits (Paper Mario Lofi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc19f18c59b74f0bbb7134335cf45ec70a959cf9d87033a79e591090f3655e0b. 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/QZFZ22416900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04064531b6cab010638c07dcfb81150610fff3b7f585f9aa262eaf03ffa9e682. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN52471745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81dec10e58fd3f71c25b6bc62312f92fde76d8dbe1e84317ee9f58a2b846cf6. 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/QZHNC2412066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37b33da3a2eb482cbcc3ce4432c465fec1edca8b6f08618f5b93d2560078bfb. 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/QZRAS2430002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba79cf88f929918ac234c3eed24a51956a51b3323dfd3d5a7acd32e378cce237. 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/QZRAS2430001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b0debe7691276f79a9e78abf50960057bfb318e37712a7eb3adcca72f65142. 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/QZDA62418895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04064531b6cab010638c07dcfb81150610fff3b7f585f9aa262eaf03ffa9e682. 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/QZHN52471745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81dec10e58fd3f71c25b6bc62312f92fde76d8dbe1e84317ee9f58a2b846cf6. 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/QZHNC2412066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37b33da3a2eb482cbcc3ce4432c465fec1edca8b6f08618f5b93d2560078bfb. 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/QZRAS2430002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc19f18c59b74f0bbb7134335cf45ec70a959cf9d87033a79e591090f3655e0b. 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/QZFZ22416900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba79cf88f929918ac234c3eed24a51956a51b3323dfd3d5a7acd32e378cce237. 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/QZRAS2430001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4871a6fac04a5dc4738f6a566f04c1ff7e203882030c903cbd7e44054af2567. 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/QZRAS2430003.