Prince David may refer to: HMCS Prince David (F89), a ship of the Royal Canadian Navy Prince David Bagration of Mukhrani (born 1976), claimed head of the Georgian (Bagrationi) royal dynasty Prince
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 0xbd099277d718bdbdc4f406485613c4d861d44bb85b54d0331fe1d5d7ac3bdac7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d783728-b3dc-4816-beef-583e042d1231.json and https://artists.proofprofile.net/proofs/artist/0d783728-b3dc-4816-beef-583e042d1231.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 0xbac62c690b6703007bed880be7be39dba3874306d698f5a5b19464b38d304c04. 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/JMA271801277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900c3ea92f6347f9e9500a405c0feddfa50b0d89b004228137ee791d5fa1f04d. 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/JMA271801278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb780ad88182ae3ced26ffce34adab60e645f700ca1a09d52e103352fe097e6cd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITAE01900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584bef61541d089e75e8f50b022caab3f9d9b9c97d1a08e4cacceeac9562fd0b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JMA271705168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dfeb0f154eb997214007c1191aeb0575bc53b23166a8012134954669be3b08. 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/JMA271705169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bedf9bc69a5016452df70f2c38036abdedd42f62e1c23e3f2a00b1cec99f15. 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/GBP6T1400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223a25e6d306ecb5da13eaaa79dce5a521fd426cdf8a8a336bff958bd0687e9e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBKWT0500832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ab10291be5b1b011e571997e80724183c73a78fb493da920e4ab12c8b7e128. 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/GBKWT0500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b8d9a3b7e243c167a5bda317677f0f7acde58c2627b537109a83e6e37c491f. 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/GBKWT0500462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e6e5e9352192f1be54c7d7522353cc695f3c02644150a1b968c21eb1c26d1a. 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/GBP6T1700246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388d9e4b842a93b8aa527e86c7e227d17ab1ed09374fd28f6c8c2e415d602aef. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBP6T1700251.