John Harrison ( – 24 March 1776) was an English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of how to calculate longitude while at
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 0x61c52b2568ba4db50b6738ce62b69f12dedd83fc83cedf689ec92ad29e46fdc9. 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/7930e6d2-acbb-4864-86bd-65e1db1ab877.json and https://artists.proofprofile.net/proofs/artist/7930e6d2-acbb-4864-86bd-65e1db1ab877.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Day of the Dead (Original Motion Picture Soundtrack)
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 0xb42570d8674aa3d4a186f02f13a584b9a9a10d12dc1185483baf620b4dce81e2. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCABU1418886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8709e15e048441dd76d5fea159a42605a9272fc140882c739bb9af153e3052. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCABU1418895.
Creepshow (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540b0417764205fbce1b04ad4126fceda0c9bf0d8ca256fda1b67dffe2a94eef. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:50Z), 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/TCABU1418755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba001dd06d75389d922a7976e88e5a9c0818e93fed33e4d38facaa17f696b864. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:16Z), 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/TCABU1418756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6221938d382d2967936462a57063f55911ca8c5d1805e90bec9e1280f68c102c. 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/TCABU1418757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65eabccfb8e49605da5abeec4d20c61443384efa82cd72a1b4ee51edb490992. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCABU1418758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd06fb480f4235da9fea2c5123b1e19f497096c52d777fea7ff258012da5a31. 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/TCABU1418760.
Everybody Needs a Little Love (From "Tales from the Darkside")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab54de201240ce560672547d1109284a1221b47d384ceef69e6c5684727eb89f. 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/TCABU1419556.
Day of the Dead (Expanded Original Motion Picture Soundtrack)
John Harrison's Sinister Stories (Original Music from the Podcast Series)
Concerto No. 4 in F Minor, Op. 8, No. 4: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee26f779a9cba9141d37c0506affeaf7415645aa28d26fbbabe3e2d1b2b2d0ea. 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/QM6N21459559.
Concerto No. 4 in F Minor, Op. 8, No. 4: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd994ac126db7defe46df5bfa591818da43ead9f278b39cb01d99e8694515ac02. 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/QM6N21459560.