David Campbell may refer to: Academia David Kelly Campbell (born 1944), American physicist David George Campbell (born 1949), American professor and writer David Campbell (Australian political sci
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 0xcaa0f35659dd6216c22bce0a025bbf69afabe4b1030d78dffcbd466fa03f005a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ed5086d-ff7e-44a2-92c0-a868c7dc52ad.json and https://artists.proofprofile.net/proofs/artist/5ed5086d-ff7e-44a2-92c0-a868c7dc52ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Swing Sessions / The Swing Sessions 2
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 0x8de4dccc3b92826f6e2591f94f7bd98094b1e94148c1b513825d17ad7adb45e9. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:50:36Z), 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/AUBM00600624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb27667da93e7846d37a7d6f181b809070e669dd8dd390ff00a65da19a329a0. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/AUBM00700827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb27667da93e7846d37a7d6f181b809070e669dd8dd390ff00a65da19a329a0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/AUBM00700827.
You've Lost That Lovin' Feelin' (feat. Jimmy Barnes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2035796917a14da33ab5ff22c0ec85bd7f27d231964e878ac3f26c0524ebe338. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:47:00Z), 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/AUBM00800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e3c70df587e7b524a165e021bdfb63b3a50eab1214820d102d96a071682637. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AUBM02100054.
Just The Two Of Us: The Duets Collection (Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d35ac13aede0b00807e0f76aadcfe8d665ba947e47369b669af7653ccb1a2c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US86A2100239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb646ee8e8ca8b08d9a655e991fa24f0873aeccb2f2c29608fd2c0b8af9385e0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USBC10000256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027a79ea8cf40018fad83dfd49c42ccd7b5a81e9f48a3505606d9eb34b0cee4a. 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/QMWB91300001.
La Boheme - Bonus Track - Not Included In Film
Demolition (Music From The Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb46c4764e660ea88abcbc5716e600c58224271f7ea2f33938747a3facb759f7. 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/USFM91600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af8a62d6866fe110149bc6c811729f24d07b9f76c0d153adbc788a3c098f46c. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/AULI00506850.
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