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 0xdd11838751194b041d109d896a2c7b87c7f36bc93366af05d40c3004cfe8644d. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/327f360d-f0a1-4756-9ef0-500aa0841e39.json and https://artists.proofprofile.net/proofs/artist/327f360d-f0a1-4756-9ef0-500aa0841e39.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Charlie Parker Records: The Complete Collection, Vol. 8
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 0xa0ef4400d33b4d505298b0b0a0faa2a1c64d27cc30b5c559c2702a060965b785. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM6MZ2232145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feb92d737d30a553e18a1f2f23163a97f78928441fc21ac5e7cfd47958cfd78. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USA560663368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027cad5b2998e16ca793ff345e7a978fb3797acb0a1585942b50dbcb2c4492c4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA560663369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706ad4b26f1b87075eab27e24374030c11bff36d8277ec0c2c13910ac7544a50. 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/USA560663370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962215af157abd79ba8e181abe987eef57e49d5ee0476bb241ca6f6c236fd946. 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/USA560663371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4b1640459e2f2aae254af6cbb5de8bd64236275c0d586f96ca85f3773dfb3a. 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/USA560663372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936884513248bf53794c5bbbde5cab8708ddc60f34a5ab9701708cc0ccd56ff0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USA560663373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b88a75ad5b31a9596873692c5853b9b55bca98aac9036e5690a3f317936d156. 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/USA560663374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7949e8ed4c13e008d39c0ee98151c3fc946cd9c091b64144ce8fb928386568c. 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/USA560663375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be638d2c9dbeb04cff9722d13dc7d4745585c395944ac8c34406637b4bdb615. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USA560663376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5041d1b5b18d18fcff8bf2a290017009d9d0baec05fe1f675b2587b411cd0269. 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/USA560663377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99926751b2c129dcbd8e3212197559fa512d1fbbcfc91aa5de62b572b5451b77. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLHR52082989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a65152c37e98f755143f17e019038619313b011631c22b482505664ee58ff63. 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/QMDA61824441.