Xosa most commonly refers to: Xhosa people, a nation, and ethnic group, who live in south-central and southeasterly region of South Africa Xhosa language, one of the 11 official languages of South A
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 0xd724aaf9c37a39e3f8cc548d7a77cb0bd824f3147565201aaa4d18f535fc37f6. 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/83a2b2a7-702d-44b8-903e-557030a00700.json and https://artists.proofprofile.net/proofs/artist/83a2b2a7-702d-44b8-903e-557030a00700.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 0x63699e45b397781393115e7e873af950f4b8f588e85cf8d45bb309d5a4c80407. 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/USDXS2400554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46be6c1aa0aa5f322fef5f4bb5e494e328b7a81f770b55a2627448e0b9f4997. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES92297179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6488cb454912151af0e27680f3e06582923d68653b620a1f548625327f790913. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ22240623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736ce76c5664b2d5d1c63bf979b98936c3437b259c392a36a0cdff0ea8ea84ea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES92297182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5985bb1b26b1241085432f0807f48a51721cc559b7c5c2ea7e4d10412410ae2. 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/QZES92297183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f7b224403a33353d1f9a771c61bf5dac9bd4ef111dddd181b529f54ee5cb50. 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/QZES92297187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f1ce924ffd3b107aff9818d5af854917f47425b9077508f2811362457d63bc. 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/MXUM72401286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea5fe96cdbd6d5072ecabe5ab17874544eb505683ceb064325e1234cd349543. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2406106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d83dadf9ea7dd6de8b9dd924118f31880891fe59b8b4f421a6030b5d87cb5f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE66N2307621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd26e1486b0c87118a371876cfc87fc0f2971f5a1864d9ff7a1deb2739ad0b04. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MX2832375547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab096f760d5d320e15f912d7aefca766233425d83a5d1798f120a8ed11a18c. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/SE6TI2303892.
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 0xb037c147b98e9611140561fa3b7b95779d7ae79115e8ee5b04ce7742ace369a1. 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/QZGLS2368262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fd288a26559f8df4c5e803891d1ffe1bfb0178aabd98cc4f08d9db4c71adb5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5BU2366253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aa8dd7379476a713255cbeb8753ab503ea8959a96c3a2e58804eefef70a38b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLFP2308227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bcb77d4e4bb82bd6b083a5515cc1ffc759e2b1709284ca87621535685d80e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLFP2308230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb0ebc8aeb5345339b6fb9456c13c20eafa03694dd2329156682f10956763b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42275151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3926d774fea4c20da3859688ba3b96a84d4896fc1a037a9d3a64c49932e9c8dc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLFP2308229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedeb359634e9245559d7535517f0cf72d64d860553756087165652c6170641e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ62293168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1146459eebeb20662b0c44726a014f3b5f76f667ec6de20c48d90b6e4e84d89d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG2316814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb5399c7dc9fbd818833caf3d29a4887a31b35e54f49454f6b568aeb21f832c. 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/ES75E2306774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14efe7f3fa478b01b8bf1883e136d432f15cebbf9f68dcc87b79b81fd6402c63. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/ES75E2306777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca59a9277213204331c91364279d9ba0b9d77ad88619426ef6c5b6cbaecee65. 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/ES75E2306775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d4db4d3116bae7fb8aefcb68801afc8eb0c25f880be3990772d16e307ed803. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AEA3A2359937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea164c11034cf30da8a7a97ee3db6d4130663e06c3d5eef69f631a76c710a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BK4DA2439403.