Adam Tas (1668 – June 1722) was a community leader in the Cape Colony at the turn of the 17th century, and is best known for his role in the conflict between Cape Governor Willem Adriaan van der Stel
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 0x571ebce2bff22a0d187f0c229f5e4951aacd79dabbb98b913a482b7daf54d766. 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/ddff7243-e8bf-4999-a4f2-c432180312f4.json and https://artists.proofprofile.net/proofs/artist/ddff7243-e8bf-4999-a4f2-c432180312f4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66e970d88f7f839119301191e938220ce1e66a9393a6b799f5fad091acc4a18. 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/ZAE531000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075f6da7890cef0b25d2feeda68c4e35bfc7eaf01d02430e476ab78d474221de. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:17:57Z), 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/ZAE531000244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425c37e65ddd3969f914e1ba03dbf0f4fa3243185caa753f3137ed600fcf482d. 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/ZAE531200427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803ccc41831443362cebc3ed335cbbb5c2fb5e9bdbe61f9e222e5ae6d040f660. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:15Z), 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/ZAA011400265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7dbdaece07209ecbf23f9eb46911594b34ed30fcf8b996e041e24753918988. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:51Z), 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/ZAA011600500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec5ce75f5e4d5983ab723498f9c433c87c877f36818059a944d3c7250b91db. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ZAA011400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7dbdaece07209ecbf23f9eb46911594b34ed30fcf8b996e041e24753918988. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:24:29Z), 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/ZAA011600500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d10f68edb4a61fcd8f49d6520392144e88b8b2d6f50c4612fd363b9b42f1e8a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:46:07Z), 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/ZAE531000248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeab0a2de957999ec924d4f540b184d6a7598713feaa3064dca19efb11ba14b6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZAA011400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9187eebb00dfd1939cf12ceb1226efd67f1a24a929773970e61c7718ee31df. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZAA011300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a54be6b461e118774100353a5bea4a942a6a2e737d4b075b642c89a36f38af5. 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/ZAA011400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa82a534d11e661aa205947b2effa2587451a7ba807660f4b043184f3bf2596. 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/ZAE531000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2194f965bb7a2c1dc751bc0297c5413ea8660d626f0e250a02697f47bb2eb903. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ZAA011500691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2738e267cdc7fc0bbc08c657c85c1f7603d755f0810fed7770acf065ec17c873. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:52:04Z), 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/ZAE531200419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52d987aebc4cb1f1837f125bbd81ea33b36d81eb74b106be921186fcc5d3667. 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/ZAE531000255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4674c51ef2fed5cc5ba71b4fb4485ec543aaccc660c7246389bcd9c50a3025. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZAE531200421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02adfcb816d78bfa5486573e2f1f54991f0973a22222b7a17bab32218082b83. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAA011600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c75c563c85b134ab90c152d2291f62f74ce69e9aa2f0cfaca7d05707aa92c5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZAUM71802250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4e8bbc32af102ab0a7cc9d3863f046ffe2e672c91790180b69e8a70cd7704. 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/ZAA011100382.