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 0x5ebc784ee29a71217843be7143713df03de83b5b12eb82e3057dbe48ff4bf359. 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/49b90b09-062c-414f-bea5-bc7cbe01bd25.json and https://artists.proofprofile.net/proofs/artist/49b90b09-062c-414f-bea5-bc7cbe01bd25.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 0xcd38a098beeef6e0505c236a8857fa30549c6b84f5c40149b6a01bc5b600709a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES61976971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf807d861fc010ab5df13934986e392d9c6b0097a7c0da920977ec0d8821c2439. 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/QZHN81917844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546a0eb112536ce12e93993fc08b1fc36d199bc5cbf17fbdbdd848f96851ffd2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHN81917846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ef4a1cd8c7f4fc2c0b1e53a7a5ff0c088c972b0b1851efdf5278a05d6c904f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN81917853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6230b74c0bd94474f2c88f7ecf899f9d39f3eca7f0811fcb4d29841efdfaeaef. 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/QZK6N1936441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d1d29d4138439de4501e204dbccb65b2849214e7af6317867cbecb2015861b. 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/QZK6N1936448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2f6341c69264701b237ace3d3cdea3c709a394921098995a931369547fdd16. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZK6N1936449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79339abe80247ba23cce535d28e2706be506d5288cb828c032eb87bef0c2b37a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZES82080386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c623f34ff0dad04f993d9e7899eb0a44dc7f49f93b2712ffd51b98fd119e6e8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN72051015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5e0561c73aa69def2aa15091051724aa15864abee62c289ec3e6173be15ac. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZK6N2071345.
Throwaway Beats for a Throwaway Year, Vol. 1
A Pull to Life Offshore (Inspired by ‘The Outlaw Ocean’ a book by Ian Urbina)
Views from Yamashita Park / Hatagaya Greenways
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76abd5603b30c965a02d2cb53ca34ac7f611cdb2439e2eb8e3de3efd194cc135. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/CAN112100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae724251a069058fb9b21914db5a71ccb9d50006e838130e21e8735a774d07d0. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/CAN112100076.
Shinjuku Rose Garden / Leisurely Train Ride
Finding a Temple Cat / Storefront Lanterns at Dusk
Yokohama Sunrise / Nightfall at Hanazoo Shrine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924c07c8a353c06cb8041c5b4f3fc413ca77739d493452f9343455ba8b7aed70. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:00:07Z), 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/CAN112100092.
Toshima Neighborhoods / Rainy Shin-Okubo
Chiyoda Book Stores / First Bite of Yakiniku
Snowfall in the Spring / Peaceful Overpass
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db20320523293ca4d5e847574d5112050aff0b356dc30c0d820c74c6318cb90. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:01Z), 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/CAN112100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924c07c8a353c06cb8041c5b4f3fc413ca77739d493452f9343455ba8b7aed70. 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/CAN112100092.
Romanticizing the Ordinary / Butterfly Effect
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20f877fe646f5d23ba1ec810a4425843ce4245205f1c9b607503dfaf977771f. 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/CAN112201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd3449266f154b6f11b7261ed0c8a2f2272e34ecaadf15e686468fd1cc19dcc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAN112501048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec7d7ce4b792eb7e4c989a0fa58f83fd78e577066996613070bfd3cac917e98. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAN112501049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22652b29f62c05593e9b1abd6b5ecc53664c54f4159a20f3c45baa523e3193ca. 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/CAN112501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992d6190bffe3226599789d0530f9ef796ed2e60b7ff06f4f50673e5c27de0a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAN112501054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c874fa1abbe6c444115ea0c98121470266933508312daf67285efbcd29efa1. 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/CAN112100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c874fa1abbe6c444115ea0c98121470266933508312daf67285efbcd29efa1. 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/CAN112100211.