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 0xe717a640768e00204d284d93467217332cc6ff2286699973ac7664fb9f0a3c2b. 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/f416dcb3-8fc5-4fe5-8c06-3836acdb24b3.json and https://artists.proofprofile.net/proofs/artist/f416dcb3-8fc5-4fe5-8c06-3836acdb24b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liquidator: The Best of The Harry J All Stars
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 0xe70b488cc1cdad112bb1ed34bb15d3354b492049b6c8ebe90ebc438244139216. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBAJE7200516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a25cc7c6dd445bfb074226a4e56167fcdd0d002aceb21e031c56fa81529d5a. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/GBAJE6900593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bc2883d4b0097590442555db4b46f907250d2c0e03cee3f3098c54ca012d4f. 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/GBAJE7001117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42061bb13a7dfe6a6cdd6ceaeca6ede76874d6f133cdb783e4adaff45b99763. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/GBAJE6900598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab353c8b536d3d18e887879f6e008f9ca10868c96fcc589c961822d8c407f7c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBAJE6900601.
Liquidator: The Best Of The Harry J All Stars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf456b08cc6e87d890efce464a55dd2d3ae64b864326f4eda46fe50510b991da5. 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/GBAJE6900590.
The Big Three (Put a Little Love In Your Heart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0de25d9599ad72958d0e1cdebaf7ada8da5f9fd93d8dc9194738059169419e. 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/GBAJE6900777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65e2d9fb4ed6d8715f53a6f41c9070be8bd9e60f8abab9ade0fc5e86f89a226. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBAJE6900340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8291962e2a1ddb6d0990ff281b3f349625e37636c2087e53e20c89bae70054. 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/GBUM71001223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8e9d984937ff8d0108456233abb731bcb6f0eb6507661da029847f129b7aa4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBAJE6900602.
Liquidator: The Best of the Harry J All Stars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0592511c95b27aca58c31eddee189371c4bdb2549d0f94d54add034ee8af61a. 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/GBFG92100158.
Toby Ross, 4K, Oram & Rise present Welcome to the Jungle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29cb8e41777a81652ce20dd17e08090ed3395c4fe1ae1144f57f0f399287904. 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/GBFG92100151.
Jungle Cakes x Trojan: The Remixes (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f42bc63701ccfdbd7db6c01b4ec87a05152e1e8d3c2932d1fb60185e6f80010. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBFG92100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4179d8aedcfc750eb5683677896b5c418d311311a0880a5fa32eeecf4d4c351. 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/GBFG92100341.
Jungle Cakes x Trojan - The Remixes Part 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406f15fb86e35fe47ca7a2228369174c33ef84bf4a55b520ac37c1c8d3cfeafe. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBFG92000253.
Jungle Cakes x Trojan - The Remixes Part 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0592511c95b27aca58c31eddee189371c4bdb2549d0f94d54add034ee8af61a. 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/GBFG92100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1d41a376c54891bebf6039a43f2b495a26922214eaae48d8926659f45144f9. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBAJE6900448.