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 0xe3c52757c5455f9cfca2479f66c6d2bc6d73b03aa1a6e5bdb299577bf6dbb6c6. 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/e3c7258e-55b1-42e9-9c40-9afd12d1c5a6.json and https://artists.proofprofile.net/proofs/artist/e3c7258e-55b1-42e9-9c40-9afd12d1c5a6.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 0x728d9ec7e00c19160df5026f29824c57924b1936816e7918165ffa1af585835f. 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/ZAC012300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd083f8d250f40f8d836eb4a649e89f7221aa4cbdb1c761bb666503b1adfbe95. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ZAC012300854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0630f6d37a6b20b3cc0b930260e292cac498a25f874aebb44b3252d0345d371. 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/ZAC012301234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1aa7b96d18de7624149e799d40878e414104914807fedad309a5ee9f7be252. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ZAC012301235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67fd549ccab0a66775d6446f28c8817385eb0a032e03121eff69ed118240c1c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:11:55Z), 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/ZAC012301236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d13e145ec8704cd0aa9d91db39bcc4eb5f4909f3e83fcb0f833ba378eb6990. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ZAC012301237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd13c7060ec2ef046f20727f82fec55218438286e3577c5747026df5dd153a1c. 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/ZAC012400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2844fb2134b99422fd7cfec171be7d5d63a465fe995f42090fb0df67a1ff780. 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/ZAC012401715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71698cb92629898ba3e1b12b5777a10352aa13bd4c65c4a0912532aff35df4c4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAC012401716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12456cefa01f86f214890f900d5ac6b363c1c7b87f98d8f504ed816581e0a758. 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/ZAC012401717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57424c2335a5a0e92d329a57f22e03f44f09c23ef1ac9725ea56ba4ded9eddd7. 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/ZAC012401718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3690cab949d97355bff3ecbb4c1a2260bc2d06ae0a84dd040a7211961e4bf9. 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/ZAC012401223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7450db84e9ba49909f8c74ff9704d28a15ad29c906bda37bd8ac6f80688a152b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAC012401720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd13c7060ec2ef046f20727f82fec55218438286e3577c5747026df5dd153a1c. 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/ZAC012400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8150c1955a553878dce38eecef334b773c4d8287336d363fdaf9df6b773f116. 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/ZB8CG2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc3539b2b4b1bf1995b53fbf9836184124ec9558964c44e9f67aa0e42d29e6. 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/ZAC012300983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a5f8e47027a72b4ba0617ae384f49a5f300fef666e49f07309280b898a90a7. 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/USUYG1572566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cf312cec3e485913237a1d6ea0f74217d1f48ee5e9e0e3b4dfd3c55c94b966. 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/USUYG1572641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a5f8e47027a72b4ba0617ae384f49a5f300fef666e49f07309280b898a90a7. 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/USUYG1572566.
Umvelinqangi (feat. Ntando Yamahlubi & Msongi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648063ca744ef9f04ff98fcfb6e3e69508c9d7f6f3c4cecd653fc73bb509e5ad. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USUYG1569038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d250a3d8aeb32aa018973fbd9699454eab2d2d1c2258b3f5e4cb8021941a02. 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/ZAP5S2400025.
Usizi (feat. DJ Maphorisa, JL SA, Msongi & Kabelo Sings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d51f437678b2f49cbc86040244708da46d50e80431e5a84fbe4d57777d4fdaf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZB02I2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c6a1496c074791c7d525bdcc027cded95c7cb94a10179d13a86042c599546. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZB79M2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aabd9fe47d23b9d2c8aea5855ba586708b263072e41091fc0cc362c06a039b0. 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/ZA56E2419785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8150c1955a553878dce38eecef334b773c4d8287336d363fdaf9df6b773f116. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZB8CG2300020.
Ngenziwa ngabantu (feat. Lington, Msongi, KAYMOR & Tycoon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cf16ed1ed0ac28298fb346bac02f2a56010ceaee5990e2995ef8233fbd6e46. 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/ZB8CG2300022.
Darli (feat. KAYMOR, Aymor SA, Magistics SA & Msongi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb580c5c73c54c760f5d1f081dc2d009b612668e07bc8228eeb1185e4fa825a60. 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/ZB8CG2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e70d88b0d9ff2776063373e9a85240ab1ace48ce3788c5c1e1bd51e6f9cf63. 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/ZBP2U2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73594352cdda8a46466809cd683d6490dbe2c3e45cb11176a3e7f71f76b7100a. 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/ZBP2U2400004.