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 0xfe6ec8596a8aff6b2c53c66a092c74335b6f78674df82afff02833181074e439. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0cbab24-2ef5-4a28-8661-0236c77335ac.json and https://artists.proofprofile.net/proofs/artist/d0cbab24-2ef5-4a28-8661-0236c77335ac.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 0x735d8bfdbbbceb45c987d69952da4d12497973b74f86053d9842b53ec4eb75ba. 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/QM6P41761936.
Accretion (The Tympanik Audio 5th Anniversary Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c869abe9c2de3f0b7f41b4825f32eaa4e04b6e55e2b33277829f48640fbdf5. 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/USX9P1237625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a7fbaee47da233f8407c70113864d2b6e628ebbb307a6c746626788c553aae. 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/USX9P1237626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61086164f7c93cf83b539325675899c4a7ccf7b787fdfc844b716a1c66b6f23e. 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/USX9P1237632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc9ec666b83beb60dc17788493783fe8346db95d89dbd54bba0c0b1a46ed1a6. 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/USX9P1237638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e614a4ff503892e03c6b83c9dd703210d3a4a7e430d07378f18e76a9ce0975. 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/USX9P1237666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ac8fa87aac215b386d0607b73f4cbc977193db809505e56f39011c4627b8fe. 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/QM9AA1423240.
In at the Deep End (Compiled and Mixed by Tripswitch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76198c64ac6b59079ecc628703fd9bb8a0c5d2e457e47789bd9fe7b5270dd76. 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/GB5ML1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e2b639a2dc0af459df94babb054d97ff801b16ff9f5e5f011001062988a433. 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/GB5ML1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b756850002da77dd75c2efcbc1d22973f708d75b0b788254e4391ee04fad6b. 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/GB5ML1700008.
Dub Play & Sun Rays - D-Echo Project Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d72931640a67a540c930e8db4b4a95ab70eeba6731fb6cac947751902086100. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GB5ML1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cb4488e5f034a7c69b0523d9ea1a63aaf4cbfccbb829848c3f0a1c7a27618c. 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/GB5ML1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d8ca9d4f0d0d057497b76bc14962df2394e42015b934e89fdec389aef0f31c. 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/GB5ML1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b40684fbdfdcf4cd06be140799709d2a0ccf4fbd3708167550314b8efd8676c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GB5ML1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0650765207ad11a1e78db909a0ff52db2c4bdcfe9fa5ce2a27da45c1d4244967. 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/GB5ML1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f2fae1e2cd1d07d0211be1d28e830dbdfd0c11172f2a2ae15597ec2557513. 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/GB5ML1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff93b22bc371b13d8a342df5822838937dfeda05ecfa09a5ac4da62e8e51066. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GB5ML1700012.
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
Front Line - A Red White and Blue Commissar Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0026758de6e7ec2a882e51687bd9ffa097411824b79930ed524ac7954472d274. 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/US6R21381627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4953f60f16b40eb96de4231a61843cbf616fa6a5307e0eae57e1bc9d2ca704a9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CAAD20610881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050cea62ebd21e957dd10cc1a7a5757ad2384a0cafbab68f3f371c394a7499ad. 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/DKZVA1560858.