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 0xda1a9ed73e50e6cb80f87d40246ba39f3be78b879b983f27dba34f4f31a003b0. 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/33fe0590-0409-437e-98b2-0d69ce64f630.json and https://artists.proofprofile.net/proofs/artist/33fe0590-0409-437e-98b2-0d69ce64f630.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 0x844e8ce86bde1489e00334c910c62147543235d7f583905ad6d4d1bf69826c33. 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/ZAA011800159.
Love You Tonight (feat. DJ Maphorisa, Sha Sha & Kabza De Small)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee2c408b7d2711552528d0da0b3e016fd3efb3763c4d0c3e4d361afe405fe2e. 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/ZA0I41900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d0a2cb426dac9ce000314a96292332c3c8f0d55326562175b072107892f05b. 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/ZA08C1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9399f2f3e0ee4b86817a7795b90782a135d56bba2d340dfcde5de593ce67b8. 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/ZA08C1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b9162c9f509e65248db079ef7eba368c8b40289b93cc66e4d85ae149ba5306. 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/ZAG9I1900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e53fac3705691f4cc4c8e923fd3c4434df060da0e04bf36c5bc9dd5d71509fe. 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/ZAJBA2407013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f55be3d8bb4f6875cbe20c07e7372a59ed83617430114dfc450b5abe55b87de. 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/QZK6M2321069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce1f3177f7d80d87a96f7def5613f403cc7ee2993f96fa2a0bb036bff70e01d. 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/QZK6M2321070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee2c408b7d2711552528d0da0b3e016fd3efb3763c4d0c3e4d361afe405fe2e. 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/ZA0I41900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04230c974da89a5ad1a67734fa627eba1002cd36f207f8ee8a114218eb4e1da7. 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/ZAC011600864.
Abangani Bakho (feat. Shasha, Tyler ICU, Xolani Guitar & Herc Cut The Lights)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc175ec06748ee2e3e00747211f94174ce7a3592be53c30d263304d48d71faca. 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/ZB1OS2300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2288ad196573a34206ebcd2c6894fc0f8eb8d3bc79fb5273832c328bc28183f. 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/ZAA012000093.
Need You Tonight (feat. Sha Sha, Kabza De Small & DJ Maphorisa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e67674497d8eb3d8d3be9cf270b144a7011970325d884806b5032e561ff462. 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/ZAC012000252.
My Dali (feat. Sha Sha, Myztro, Mas Musiq & Thabzin SA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2e2d4d4f87eb43b1b674fdba7bf2b3bf596abee586171c6253ba4263f7c5bd. 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/ZAC012000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c455c43d5abbb2e363b18875661a1d95dc2f45e1d1330e1e9e7d5c0262d125. 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/ZAA012000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd07a71b1215c3ae545a283832b449d31ade8892a56119d31e3b46cc9a20644f. 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/ZA41S2020930.