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 0x84827dd1ff8f81afd8fc07b4dc6e7861d867bf32f16d704f35f0f5bf9f25a341. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/763f019f-65d4-42d0-bef5-f6202d0a19f2.json and https://artists.proofprofile.net/proofs/artist/763f019f-65d4-42d0-bef5-f6202d0a19f2.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 0x99f77d09db29c14dccb74993d385992a89d60aed63d91956060474c3fdc3ceec. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:28:19Z), 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/QZK6H2126514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191a5ba115f24d1da2ba611ec954ecb7ed15b42f073583c242c8958e44097121. 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/QZDA62307819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6eaf016c2c9d958321be01961c9e30bd0bf9e7a130cf3a66462f060c748fb5. 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/QZWFE2378746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d4c2dc4b4d7b15bd07c5f5994fb47858a711a13644b59cb2de0f72c6ab6a54. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMER2405986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf3bfc63c240c269949bdc035984fb788a814d68eb4c8f34a4bc4e5f44a44e8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPLS2490132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37f2a801a001562c1e37b263a9d20c806646fc0bc3a2764e415f89aff5247f2. 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/QZPLS2490133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe554de14d791d8eed91d868dc80c439f071094675efd7a67d081aa839f51b9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLS2490135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b84875bf277967232ee9449813f3c317cc15abbd7a810336e242f1f9fff6c7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:35Z), 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/QZPLS2490141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf68efdb1e0da0c980f22c55075e73ff8ad10badf997d3943ff85cf6a243028. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:23Z), 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/QZPLS2490142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86992e0161b081ebbbda87689b2506098cbc2e5aa33ca5d625b96ae88f5cd705. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:48Z), 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/QZPLS2490144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734193020ed8f2bb5a2d0497cf3dae6133a574e9296e72781a9803ca1e799035. 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/QZWFE2458646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c95cde9871d1b35156b58cb92aaa617417f71eaff21eb55339989db250762f8. 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/QZES92583013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b7210c202407806143273d7cfa40072ea35fa23b1bbfe36283b992784fa241. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QM6P42598208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6b678742d7a0ec3eab8fade23be690f50f35bd84654e3a9a4f6823fccb54fe. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ZBIW72500012.
Ditshele (feat. Mr Pilato, Debow Taliana & Nichole Rsa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6b678742d7a0ec3eab8fade23be690f50f35bd84654e3a9a4f6823fccb54fe. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:01Z), 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/ZBIW72500012.
Justice For CweCwe (feat. Nikita De Djy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1beacdbb426c148f95346b53e3d036d6d7c7f69a8d273a5c66b0108f734e0c3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ZBIW72500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21b230567d8425b5368436498b17fe3f82be5f70d9e2c27cb05bac22606d51. 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/ZBIW72500031.
Tjotjo (feat. CowBoii, Villa & Matute Boy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d171bd0408145cf2e1333e127a06b8a7f66f37c312bbd87f1a7fdd886e0283a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/ZBIW72500006.
Gibela Istimela (feat. Reece Madlisa & Hip-Naughtic Sean)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9745f9ff7915dc52d553137e4138c30bfa15191360071a0a820ac1f58ac033f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ZBIW72500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0523bbf0e89bc6a4501dc2ca26745f58d1e00902c3e19529fcd5ac3c1ceb8b8. 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/ZA03N1900032.
Ko Strateng (Ft. DJ Dadaman & Nhlanhla The Guitarist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5829877e9171ef8685e3ddb172bb042a634aa09f366545552043bd6a1bcf1511. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMG2304560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f44d8c2cec9d260f55eb0288843517ff55c96168feec523a660c7e7e076746c. 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/ZAA012200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ffb6abd49fdd093630c8d4c4f851701f17b5239e9659c64bdf40738a34aeda. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ZAA012200226.
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