200px|thumb|right|Joe Garland Joseph Copeland Garland (August 15, 1903, Norfolk, Virginia – April 21, 1977, Teaneck, New Jersey) was an American jazz saxophonist, composer, and arranger, best known f
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 0x824f7033bbe5bc583dbbd5b72260844d75393275bc77d8cd4da436ce9d197c7f. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e9babf2-523c-4efd-92b8-7b8bd5523446.json and https://artists.proofprofile.net/proofs/artist/2e9babf2-523c-4efd-92b8-7b8bd5523446.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Those Were Our Songs: Hits from World War II
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 0x3001ccac68a604e73903393b70a4e3de7d5dc83ae40596e2de05fcb898292b66. 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/USA5R1154502.
The War: A Ken Burns Film - The Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6c475afda002f8b402021ccf118cb8c5fdc0b5c94838ca05f2b7e77b6a162. 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/USBB10200858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33754d38c8bce39f9e3daa68884711bda34a6e6cc57b05b3fb5b9f4ed48b7ba5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES5630703242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd8373ef6c3f5b3f2471f8378b2b09927fa2a74e693eb5941069a91f8d7854d. 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/CH6540854113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8351ff2a43e78cccf5bf0276bf1582f19819556c567b8b3dfee52c7420b716. 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/USCA20101200.
愛知工業大学名電高等学校吹奏楽部
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1974466a6b75c16e2f7a35cc2da47b88a6b0c82116cb40f53e07540963f28410. 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/JPU901801657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb427a2bed09be0e08997c2cbe1f698e703e5d346621a9aecb1e9767989ea68. 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/USBB10000225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5740d3f4131a1e68e1287ba2c1bc761fa90b491662c4539165d28bdde9fcb4. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/DED811100660.
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