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 0x845266a57a3945a71e1bf8745b5c48cb4aaea1d9ca3180b350d39bc06a90cf5d. 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/d4540652-1be0-44b8-b677-3392494195ad.json and https://artists.proofprofile.net/proofs/artist/d4540652-1be0-44b8-b677-3392494195ad.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 0x288c67eac7d856358b3b28dc3a0702c581337279d041df28c2c65580b0f73121. 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/ZAA3C2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d00893ed75a71f95892bf2414e82e9d1f9e14dd9576f2bec29ee7304a9a3f2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ZAA3C2000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f358d15b09715ceecc43b775b3588585a483f5ed80333e78f5ee6c38b5b61b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ZAA3C2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb87e4ffad4a0c0328f604e9dacb796877903b8314cac05d8f7105ed68e18ab. 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/ZAA3C2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d215f367643de2ae0caef06435d1ae97fb7abef09abb9415a59b7e46f4c83f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:57Z), 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/ZAA3C2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b923b4e60ee563d35e21b74d792dfb1e2673917f37c4b4c76bdc408190b17c4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ZAA3C2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b8fc2ef554a68a53c48f5677c9a91e1fa272ebe25a9f321526aa2fa1d4d84d. 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/ZAUM72102126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5120501c57ff5f6707523433a4f331c725de617a1b232d0a5a9620a8b6b979c. 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/ZAUM72102128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c8b56ec3a6543c180e72e6945d5a0aab170f7a6a1bc216698ad6ac45e561f0. 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/ZAEI72300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86959e57fb350818f5079eee4381620a976b4b261f9019078e0c97426e5ddc88. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZQAY2470147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc8d628386100086fa64cb2a5c88b2a342684642f6462ad2a4433b8f6ca66e. 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/QZSYP2480773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af2e2178cd9677d0fe59d25fa399d3ff979d54f76518d3671f1ff6f71fd05c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZSYP2430109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca995449b045195000d206d96287022a5551402fbbfc3aeea23d34ae1bb813c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:32:26Z), 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/QZSYP2402661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc8d628386100086fa64cb2a5c88b2a342684642f6462ad2a4433b8f6ca66e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:49Z), 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/QZSYP2480773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2b5b44b0025e813bdfc3b1df1fab4ffa21b50f4d1452a1460d97798257a358. 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/QZSYP2450261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ca13f3d1a2177bae895fd9de10ee532326e0eff1217a03b94c062be1968748. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZS7J2406639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd722199d56d40c6369fdb538e6c808f38957406717e3e65f705912eac88a114f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZS7J2400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18686bb02568d3a8a596da90da7f8e0926afbfb9da06ab5c3cdcd765d82594fb. 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/QZS7J2403535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38137ca47036420fb9291dac6d7b226b45f1635a4a0697f6bb07b6bc1ea8fd6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZS7J2465850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298add1bb327505049810096875d0907892631185a46486e72844f15e4461de. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZS7J2422733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bd4fe7ec15931c2136c130709a1e3dff19ba5cbd0835f81c3acc5eee90b271. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZS7J2412072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22431ef904f9eb56506664bd42bf7e9810e73f5245b97804d2757f5a0cfd601f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZS7J2556608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47e28ebf6628ebca5fd4e2a2a5fe252553c5c53b14a6d1587894799150065c5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZBEX02300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4597871b935b13739240e6cefafa1a0cccbd72207307f40f1a4569a6713d5437. 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/ZAUM72300703.
Nana Thula (feat. Njelic, Young Stunna, Nkosazana Daughter & Xolani Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8013099dcce8ae60366fd3ce73fab34565446d16880162b4e84d7145ce4fa1a. 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/ZB88P2300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4597871b935b13739240e6cefafa1a0cccbd72207307f40f1a4569a6713d5437. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAUM72300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83563492698d88e4414fe68f3b382a23115251ba50df469f81e3a6f13d30747d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAUM72300861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83563492698d88e4414fe68f3b382a23115251ba50df469f81e3a6f13d30747d. 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/ZAUM72300861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf9ab9c5eba0af988b80bdb676ef0f265b7234bb188df23bd5dc72797b1a2b0. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ZAQ652300006.
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 0x09a86aa02ae2ed7ad55a8eb653d179f9c705afdd424346894483a481911077b9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USA2P2423824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c7196755c4ec675f64fff163bf4379986fc6848b7ffedc74cc0e02494e9376. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ZAEI72300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f310461e3ba3749fbe7cfc450805b6b4c40b048dfeff2b0cb97b1e8ad2683a. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ZAUM72101439.