Taz or TAZ may refer to: Geography Taz (river), a river in western Siberia, Russia Taz Estuary, the estuary of the river Taz in Russia People Taz people, an ethnic group in Russia Taz language
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 0xbe3bd2f3c2baaae557c0ccdf6517b1f4b4911fff69d48fac2c9ebb6d7d2c07f6. 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/7284e945-7251-4896-ac2b-adbab908522f.json and https://artists.proofprofile.net/proofs/artist/7284e945-7251-4896-ac2b-adbab908522f.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 0x12472c923d418b95569a35dc292c997e48fcf136063a8f804463f27850a98de3. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN62198857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe5b0d6dc4460ada62f04f640dd66d3fcbd9184fb3326222de5b6a95e23271e. 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/QZHN62269128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f0eb5792ee4cdde7091d2a128a5cc8c9cdcbdda24a95e60c75f26c79c95c92. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZRP42231325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6438a217e3a57453b500900cc758010bbf5652465c64772af7069fa6af6b0daf. 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/QZES92393132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6438a217e3a57453b500900cc758010bbf5652465c64772af7069fa6af6b0daf. 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/QZES92393132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d80c866f9166d27defb5b3719ad4ccafb39f7f958933617158e95439566d771. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWQ2396449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062bc0b8364ea5016912d475c3c5aa78c3f76607ec3081516cf645cbc8656e22. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZHN32401591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062bc0b8364ea5016912d475c3c5aa78c3f76607ec3081516cf645cbc8656e22. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZHN32401591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141d4436bebb601dbf3ce5e29d813d762e7ae2ac2f50e65c2bf13b3e88cf7e75. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZJ842402975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cb58037e9b0dd51dc10a77ab511ccc416d0d8fc11c89580e752fbfbbdf868e. 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/QZJ842500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c67db1525255ebd17a705b49a2f2ddc7139fd8ae33a32f0df9d67b91e9e267d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZJ842500613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a790a11734287c520ed2673c4b5ad4116f80d8ca2a39450a03cc4f8cadae6cf. 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/QZJ842501097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d98ceb2fb9ef3572dfcc2b4d7d705023b443f43cbdf63bfc92ac7fc0b5292cf. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZJ842502221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b33adbfd9e4d62163f19c7a2cbf7af21fb0905a251cf12b670d98891ac3e51d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZJ842502222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dd853a59a622c0070f24ae513a5af4e765d0b88fcb4d9f1890f161a4a9c176. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZJ842502223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c67db1525255ebd17a705b49a2f2ddc7139fd8ae33a32f0df9d67b91e9e267d. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZJ842500613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1f856496bf3c82ca17ac124047fe9725fe4f4cfea87684712613d0c5246b32. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZJ842502224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc91f2e8f0b877df4603b27e07381f2523470a77fcf0d1e907cab8082dbccf11. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZJ842502225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e154ec1acabdad4eea2b8b723110bb02accf37897214d4efeeacf5b97ab4af. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZJ842502226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63db847aac577852b30142a3bc43d7567c15ca75b8a27c30e97e903c08dbf00. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZJ842502227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9a6c55a09a6c7c9ca38aaf2c03848952421d69340ce5093d67e50ac6cc615a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZJ842502228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0113552591a5bedcd5b38cbe05678158c2c029b1aec745eeab90b0f505b792. 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/QZJ842502229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e86a70cf1ccb3b9269f80caa40212c0597ff97dc01f5e59170546b272110c55. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZJ842503150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02037fda0912674b78d9fa03c65ce8384e66691ce984645d111ff04a4bbbe8cd. 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/QZJ842503151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5177b04b8baf73e3c4c31c3cbe48ebda45f465f3d45ef41c4baea76fa60b044b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZJ842503152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f4dba4dff8342a538921073db96b5f72e2a2f7099063a72a3f6e12e41dabc0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZJ842503153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde120d571ac89f2f520dbb32166dc7f60ae6d4613118a4b57221ecb6d495ea41. 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/QZJ842503154.