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 0xa4b8dde3317acd896322e0fe29807eb551316b4f864d57f8b8fba122c4b937e0. 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/9e9b4f4a-ee21-455e-a8ae-41bf83cc3073.json and https://artists.proofprofile.net/proofs/artist/9e9b4f4a-ee21-455e-a8ae-41bf83cc3073.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 0x9aeffcdf67dc455b773eabf9ce8eb2b612d8bcb301cb15dd5b867970f92a0692. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ATX790770010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798d8d83d0076f05dc24935bb00f55ba8eb1d6ac501a3aee8555e2edfc49ab9b. 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/ATX790770020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c3e739be0e24ecdf67fef1694d6793d55bbd3abf76e906f2ad59cdb095a0e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATX790770030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9902b9f79b03ace81a424deb53f8bf71278b5b26e52d3a106c40eb439033fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATX790770040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d095482c9f2b2f3a5c72acf505bd1033390d8be2c0d2ca91e2ed55680647db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATX790770050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6ac64bc8e2ee6d54f597f84adab3b2d14c2ae74e77f4448f7db96f97d6f83d. 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/ATX790770060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928ae8df2b41b9044972d07ed42ad7b861dce02ac652764754fb548fe9268e43. 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/ATX790770070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d0c43c3bc2bc03195b8bc16ab1978624e4a523e21b01a50f815444eb3466d8. 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/ATX790673030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56682a9e46c1b1f3cd95ff6e700c2ad46ab7b3893aad9f3f35803fb385e5181. 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/ATX790770080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9852edcf755cb5fe6b94ead74b9a2ede4c5971c39167a343708d488388402853. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATX790770090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7a6fe26f0751b71d70c8d0364c95e8c1956e8f2c8fbbeadfaab2e8f664504e. 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/ATX790770100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f1014634ee99f14c5517f11182c345fe5daeac6a1c2b1ad089c23055c3949a. 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/ATX790673020.
Buscando (Bonus Track) - Karuan vs. Circus Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d0cb4440ad316f938f997f18d3930e274e6761fc466aa259053853fce13c2. 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/ATX790640041.
Vienna Scientists V - The 10th Anniversary
Dunya - Nickodemus Message to Bush Remix
This Is How We Lounge - The Sunshine Enterprises Remix Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fde0ef4f64a4aea92d1f89734764c7c1dcbe78e5c93cf592afc6a1f8aefc150. 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/ATX790313021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d0cb4440ad316f938f997f18d3930e274e6761fc466aa259053853fce13c2. 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/ATX790640041.