VDA may refer to: Science and technology VDA-FS, CAD data exchange format Vascular disrupting agent, a class of pharmaceutical drugs Video Distribution Amplifier Organizations Verband der Automo
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 0xb45f43c42cccb3eeb975489cd7fad20dacc26813cfdf6fe9859760deacb1dccf. 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/4cb29e41-2bd2-437c-af75-561973791eb8.json and https://artists.proofprofile.net/proofs/artist/4cb29e41-2bd2-437c-af75-561973791eb8.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 0x32e0698d7112436a024637e4d062b8a99f659ddf2d6b5b461e609b399aba1c14. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/FRX201803020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ea62eb265fb85b8ea7e06fadcaf0400e4779f08f4be47461649cbfecc6a12e. 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/FRX201803011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d10991a9bbc77556419577fa274c8c62c8acf03504567a2bba993fbafc8b9a. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FRX201803014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c6385b710785e532a670cea480b6f11b008a040484800df7cc3b9107f52016. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/FRX201803018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ad496fd1c7a2a47625013e4396432cad182cedaadd471fccf4e5d43527abf5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR10S2015935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8985c2ca936dafc7713b8016eb9e051107ef709ef1b14ef9138f3688e32d49. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR10S2015936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6607f861ee5e0c9a39ed1272c22ca9f361f54eb3378b7ba90020fdc1fd68ed0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR10S2015937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21bc7dca5e14845bf4525d17367d5dd4143c64d852a3f3d97fa5efae083062e. 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/FR10S2015938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c790bdadb696beb6e5b146c4e49ba8988954d0709e2ce6132caeae44a9b5b47. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR10S2015941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163b88e565d3f93797ba5e71e2e0b62db505e545ec9f2519da477fb245dcd697. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR10S2015943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dea85d448b376a9018743600050042e2c5ba627b79afbe3378a9b5fd05b1ec. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/CI2DY2200316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574e8c161333ba40e378a1bb644807afe639310df0a4e1fb73d9a660fdded14. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CIUM72200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d34a1ad1c1c3c8fea3e57a3fa0a29d448874b91ff9445dfca4f185516cef08. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W12232177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3062992dab41681a6c5303713652ed3819206d33f602306dda49568fe963eebc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CI2DY2200373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1288d03b586e7ace98163351deeaf4f415341e47c208a24eb9b8c0c70dd225d8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX282382541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e035dd5ab22eb713626480c7d3ef2fb75dfbcbe0f013b7dcf54f9cc1159d67. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA052344022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac033362e4b3037587c6489cfbfeb5bb0a5b715f4a6d53fc5731241927417089. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DGA052344030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269218b0543a322b29ee6f0502128bfe9c9e7bcca30dcbdc81656446231c6906. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA052344034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3e59f0e71f89ae4893261e51b7489ee2919b149c6ade996f17aca480b9ae3c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA052344015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d101ad8fb19f7a0fc9c2d1da98c109041667ceb2759be07de0c374d0f3a614. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DGA052344016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad43d02e136974d553305bda0ce5e3d02017361832f2a424458a51ee995c9337. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA052344019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a796ebe4699b88f86f7e10ca49deb38180c58ca53cc2f3ea570309b18891fcd. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DGA052344021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e035dd5ab22eb713626480c7d3ef2fb75dfbcbe0f013b7dcf54f9cc1159d67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA052344022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9af3c9b1b2a06bf078252a9a0cbca0a11ec412360f719510653a486cf6b19f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DGA052344023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af829c7201aed6dc5adce089b48543264fe8ee5b5ebaa76201b17e9e0b35c81. 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/DGA052344024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e124e6c95021296e43701e46edc8e846c304d844c128b797f825be74d126d36. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DGA052344026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1affbafebabc0f8bb8f0637367e038fc6dc00ed1c69c98d2874a75f4e60822. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DGA052344028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73de4e25bcedd73eb348ce14d19c13f076fef3ebfe4bf8179058c84a0b38334d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DGA052344029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca28714d65da989c3366d7ea5900f83ffa97bccda1f3d0a9cee6fa3bc0348a3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA052344032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269218b0543a322b29ee6f0502128bfe9c9e7bcca30dcbdc81656446231c6906. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA052344034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6047046e45b1c57f2753e23f6dac05dc3adb8c52ea39dacd9c7870c8597b890. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/DGA052344035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb241a4e1d923afd7461d15e4865445762f8545356c5d5a658eac30671b98549e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA062397884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6860818e053e047151505a4a93c7201dd7500425035877592386a4a01da167. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/FR9W12434841.