thumb|Mbira dzeNharira music group of Zimbabwe. Mbira DzeNharira was formed by Tendayi Gahamadze in 1987 in Norton, a town 40 km west of Harare. To date they have released 11 CD and 3 DVD albums. Bac
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 0xd3c3c736665f1495f2c9ca3ded69051feb8c66b187a533f22344bc3a622ecea9. 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/933c0fd4-961a-44d9-8721-341ccabe1946.json and https://artists.proofprofile.net/proofs/artist/933c0fd4-961a-44d9-8721-341ccabe1946.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 0x7b13ccaebd1a8c41201ee1573f2f04892dbebd2bc3dadc9e97a2a19736790247. 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/GB96Z1101594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d58b23e87fe3d12ad242d3107cbf96545772d44812fac3ed55f1b9314d0831d. 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/GB96Z1101595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8003be38f718ec7a104ebd3d80211deb0cdc8973b94fcb8d9ff1ff1d711d94e2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GB96Z1101596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0413827394f43297cb7868939ad8df875b1a76e05cf1056fd9bb65276e8f730b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GB96Z1101598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964f5aec9d6ffd6b8094112a80f037ccc985a35fab7320330b4049443d90b707. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GB96Z1101600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe458f97feada5f5d7ec672da7fcfaaa45d66287f90e174f9b397b1d3798098e5. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GB96Z1101608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5cacdbcc97fc413d69e0d9ba163bb20f2c10668d38d6f5195bf7d3a99e5891. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:09:10Z), 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/GB96Z1101609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a6c8d27702d8ddab01df6f7f3b10cae94f4267875c5fa7c129587db672e5ab. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GB96Z1101611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a5a3c014a1c78c153bf0ad55ca39a60fb598d6133b59dcc240652ee7ea40fc. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:48Z), 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/GB96Z1101612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9d9919c37fdf3c495844f0769169aeb3fe91af1c1d485a45b8f5bab6dd3f2c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GB96Z1101613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9736003bfcc05491569d1104aeaa692cd62b4dcfaccad508d471fa633499791a. 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/GB96Z1101601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb97ede4cd82c70b9dee94cb3de00b3bc49a0d2440ba6f4c06b15918b4ec0ead. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GB96Z1101603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0e6a04dd4b90549ffcd829dc8008e769cc0aa83e2195fde81f167883550d1d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:24:56Z), 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/GB96Z1101604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ab4dbcf48c3d3b9912ac06e69626c9e365df5dc9eaef628e2b582b9cf66205. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:27Z), 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/GB96Z1101605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e55d41c1081191239f0b62604c27a91d151d9b330cbd3ba386e08b7ceed7aa9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:40Z), 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/GB96Z1101606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d816a83568e6f11cd4ee17805689ecc37d84a4df308447ef642b4e169bf3e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GB96Z1101537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87ec6ce07dcc5a81ab5a153f32e2517ed6f6acfd2e8f90c747859296cbaf90c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GB96Z1101538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36151f429ccadfea88be14f1167f8709c8f76a599b69ae8685acb8df39b14efd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GB96Z1101541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedc3c9c9f72de67a63f065bfdeb4bbcd9a806dfda460d758f2dd4522b7ecdc6. 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/GB96Z1101542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9323035cd9f28e8b3ed14cb3fad6e74c364378b896d9533e0bc2fe0df27b6d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GB96Z1101544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c6335239f15b3d47ea1a6864e3f86340f2583d59fb53b4253688b23f08b2d1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GB96Z1101566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d06eba9899559b1870eb446c0fae02f601d3edd8c97d136ef659981848fdc7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:22:51Z), 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/GB96Z1101569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde3d272ca8d48fc0dd324cdf21cbca3a7aa88007d74093fc9bc1feb1eb9448f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB96Z1101530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65757bc3efd5162712760f0ee0b7e1e93921946f20416c34ffbb667e6df7505. 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/GB96Z1101531.