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 0xfb4f19b4a6f2cceab133946350b2c7948375b2d9d1a9187f8e54a22f33fc84c3. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2acdd15-c2d1-43e4-be63-e17349d96aa0.json and https://artists.proofprofile.net/proofs/artist/b2acdd15-c2d1-43e4-be63-e17349d96aa0.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 0xcd5dde94264faa9f3a5ed8d04acaf78b1bbf22a87599c57ca08359be5ecf7605. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USP5V2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea676d6590262c5e692343acb8028a7bd39d0ded47dc9ebc694884020f6a772e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USP5V2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8f07f680fdc46fd7b8795e5fe8a88250fb3b28693a23d0b5db67c67832e90e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USP5V2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea676d6590262c5e692343acb8028a7bd39d0ded47dc9ebc694884020f6a772e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USP5V2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5dde94264faa9f3a5ed8d04acaf78b1bbf22a87599c57ca08359be5ecf7605. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USP5V2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4698c16e6da96cbf3677209f5dca5450a7abe51cb1677c847581deb97f0a21f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USP5V2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a44f2c9efdbb508d98f9d3b2932e925f0253bb658e1a543a37a96438283416. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USP5V2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8fa905dff95d685520c4158f0d104ca49f1c48745bba47729a092ca619c0fc. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USP5V2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e85058cd69e64e3cedb88a53afe2a24d00d35663b52499a483e74b419019ea. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USP5V2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7a3bc5badf23eef37a9299263be8049e98295242894ea9a4cd2b759470e6bb. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USP5V2300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651aed38675ec01f038f524a044578d6e7154a6968ac2d06e2cce51a20798016. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USP5V2300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc3e2e07b212a4412cec0fd98838c71bb6296b2ec02c6634873455ad18636e9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USP5V2300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55b04fca6a56ee6753ae4f64147556ec680970538dbe5de3cd550c912a96910. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USP5V2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d5f70c0619a893416ae40cba41bea7bb3d090d80852207dd1ea0b96acff574. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USP5V2300081.
Back in the Garage - Los Angeles Fire Relief Compilation, Vol 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b2b03cbdf927631d0a2a6a2b2749c63415758b51e578d8613397a6ba4945b5. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USCGH2551864.