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 0x39eea8b71b1ac39a5de851ca41c12928e0e9aa25e8ee718331ede8c87535d2c0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b26b60a-b169-4f8e-8113-f179a5e41ec0.json and https://artists.proofprofile.net/proofs/artist/8b26b60a-b169-4f8e-8113-f179a5e41ec0.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 0x7fa6dc776b573faa7285d088f025879c0eaab25470dd8983b9819d865549d139. 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/ZBO4F2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b67eebde148517ae8882d8369ae174905985a502f7236877c9d25782202b86. 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/QZFYZ2434159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ca0b0d2ab39bf652e6ff82434e3d70d778d443ef5b741cd77d914a28975eec. 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/QZWFG2370644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45deb94bcbd461fd9f96e50bb29e7e4bae628396b7d5612b14b7a907c618186. 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/ZAA012300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa167ce144b7f68380f5afc48d29ccb065fbba7d0bcd6638d1a7bf9a6cfe1d928. 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/ZAA012300084.
uMakhaveli (feat. Pcee, Umthakathi Kush & Don Deeya)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80f01c82a8b7b4f8caa2910768a47fa1675085865e0c765fa57fb442d22441a. 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/ZAA012300085.
Oksalayo Siya Jola (feat. JazzaMusiq, Kgocee & Star'Jazz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96683c97edbd1c8757c76f517d64f072e1d0e19d949f4a7ab2ea4e4d250e9446. 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/ZAA012300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f345132ccadd6153b38567f7775a6100bba07e50c9baac196b16f155cea810c. 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/ZAA012300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc02727e72f874800a97b381dab1f2aa5b3f8af323a8f12785c126fc19a5b81. 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/ZAA012300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f77fff5b6520d34068e6b154454d5073542ceb4219cd4cc4b311a95e57d734. 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/ZAA012300093.
Nolwazi (feat. Sinovuyo & Umthakathi Kush)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64075252992fffe26b8e13a755fba37dacc0d381c2a558815629333fc8336f6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ZAA012300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b9eff683e00c3afecb892ed47f121aa82ae2e3d3fd59f827b338187b7de230. 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/GBLFP2390086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b5654761958711fed7d45158072acb547a05a37b01d7b006e9de9da200d572. 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/GXF9Q2479004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c3fcf8b90e5efb9ca99c264d2d45c5b30f14a377b6ef5d74b9476412aa8ef. 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/UKXN22428738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47009e0583290a09a7e43bcd4814b137111e4b81283144c0059b97a0b25a7aa4. 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/ZAVR42300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7105e8d93e286cce5ea8f71574ff92ab854def6a8e12a1c0eeb2086a746489ac. 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/UKXN22463286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7a5f9758f4adaddd1e6868ea42488c2ace332022fec8c985ef57d9c005589d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKXN22463287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1e900f84671183bc70abc41199a2d7f73edb6ae25b28a593f724290d794d2a. 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/UKXN22463288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2320bb5275906b890998618ebdd9bf2f169b5ecc898868114ace4636d4c3d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKXN22463290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfc9637497c94afb44b182142d224032fa8327d58c92570ed421aea6e94853a. 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/UKXN22463292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eec65a4d7a1b0f7f553acfb438955a79d86a725a8eb194605fa1e1dd44ed73b. 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/UKXN22463293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e6bfb3f80ab591aba94af3ed4b758cfc4488bcdd9fc66535c51d5f24d01e2c. 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/UKXN22463295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39732aa4fd19330495c6d05ee2e9ea50c1e097bc93ab399404fe098eaa1e4408. 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/UKXN22463296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8cea92f7729d61f6abfda7b20a6addb5f6627720aacd3aca08376c2055ec49. 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/UKXN22463297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7324e4a462acf71c28f32daa9c6f4e68c91ba7d1a6cdd1391ee6ab65efee100. 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/UKXN22463298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf291b76e06700ea1cf1d211869a74cb60f6e0c6fda41d55186c5b12f240d0e39. 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/UKXN22463299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ae1c31d3188078177a6e91a33cff7ba4c62210c22d972f244e0073f05b8e82. 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/UKXN22463300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1801485b96e02c51c8a3c1752ed5d743418c12275733d31d79bcc678b8de3bc. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/UKXN22463289.
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 0xf9df0513abd0a9b6f52c1c57aaeb4fc35cc79cd2625cef0fe8f488edd40103bf. 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/QZN882524700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488f3bc74a0fd6a78f7f11a5100d493598a032ab54ebe4573d9b820845d48d90. 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/QZN882524707.