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 0xed6829aaedbf47bbf4d3f1565b71b4a47ebff1fbe633ce6b127f77e02e42c22d. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4da1472-3ebd-4996-b3b0-b901fe869ef5.json and https://artists.proofprofile.net/proofs/artist/a4da1472-3ebd-4996-b3b0-b901fe869ef5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Remember Pearl Harbor: Classic Songs Of 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 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 0x3fa8cc2fa4eb85076ec50fe2ff64721d8fab1e1ed02a319a051280df3fa0f115. 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/USRC14207195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa127190aee224f7730eefc5ca865d21da132e9103de9431f846ffcf8e2deb985. 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/USRC14107191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b85ac73eb9ad07a01050fef763eb8b50855659e5663c6449f6688422b23e91. 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/USRC14107192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b20ce5c7bfd3eb19fd18656e3517a948c58248d32f32fa439858558989d778. 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/USRC14207197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d90555078d5cd023326aa947eccd723c1c5b0c3c3d6e6da2e94bcca4745b3. 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/USRC14507205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474282e55e52e985d3096bc506fd62fc7516288e139399dda53acc6acb8c01a. 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/USRC14207198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e2a97c38b2ddce7b9dfd2460a47ac137190dddd9f61b8662ceaa2a9f572282. 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/USRC14107194.
Three Little Sisters (from the Universal Picture "Private Buckaroo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6a0b39ead404270f26f70a487ca38fd485af444078dcab642b3dac532b8950. 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/USRC14207200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5b9683578e96ab9472728f64d951a66ce7071de69ddb8e38ea62f24d4feb19. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USRC14207201.
I Left My Heart at the Stage Door Canteen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8d6ca708e6ecfca036794ccb3e27c1376353b1fe4573903027b9e79932564a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USRC14207202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc295991588489c02af085ae37797e7c5c4013215ddcb0fd134ab28c1877374ee. 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/USRC14307204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa760d59c3866abd9be5a2e0661993f582002ba49f8404cb7b168108d571f21. 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/USRC14507207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde89be99a2601188ceb3dec68a1182c6c78d89810f4bc2acbfb9983e006b2e29. 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/USRC14207203.
Skylark (Sentimental Journey - Hits Of The WW II 1942)
Carroll Gibbons & The Savoy Hotel Orpheans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0731e81429177b61d01eaeb95d87087b25f496ab2d92bdf9031323ddb356aaa0. 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/FRX281560400.