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 0x9c0b65069a0ffd98a559120d7078e3c75a47545547a4654d1cd2aa0353cdbd5d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e720927a-4bad-4dac-9929-7dbdda709b26.json and https://artists.proofprofile.net/proofs/artist/e720927a-4bad-4dac-9929-7dbdda709b26.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 0xcc42a8e972385507e5b1b495aed81c2822023c5695257c91189d728d20d02611. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPU901901642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994d343524665afb7fca291bb86e92edcef6aa654de5364ee4ce19d4f7daa33f. 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/JPU901901644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd268326b62f614ec313da4a9e803ac554d35008da6dd8836c092d6c504a99daf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPU901801351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145d70042f12af69f944da6f03799d1921d9d54131c1fb14fdb7323f3fa11eb5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPU901703420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc601f3b6dc048a2eb5b9b58ca4e62fdef887af0363a06f97aa403ecbfa1ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPU901801353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2104294a82dcfd8422cb0991d7d541c825ca66ddc2b439c0c10282c8d98f547a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPU901801354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e40d89a98990dded313c9dfc743a6f49d52fe027b04fe1d266bfc630e824ae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPU901801355.
Tagitteshikatanaiwa (studio anima / Acoustic Guitar Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3aa495e83d7152bcd0293cb43b74d5f55db04b39a0d2684f91573f4da8751. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPT2255707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0356df3b2b4605966fc14bd44caac315d925084c00393c4276834842716bf1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:59:16Z), 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/JPU902100283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7d9034689d1a119c3d66dd56262a5988bba9df2f734bd0c00a97b1453f1f02. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPU902000234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddc19445bb71fb29fa55e6d1c7238ebfbbc0149fc095978d48cfa61bbfd202b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPU901902301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054620099569e0506a6af8890319546dfd6f3a1ba458d177342a363b9ee234b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPU901902302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59c14670027612371c75c5bd188a3ad5a7e5e4cf2c71febab8dc279270e8b7d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPU901803952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145d70042f12af69f944da6f03799d1921d9d54131c1fb14fdb7323f3fa11eb5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPU901703420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2922995edf29def66bcd6a14a40b2ea99fa0b5655354c43c79567f88664f602. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPU901702914.