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 0x45b26d6bcf1c2117f40ebbb2ef13630217e98422a7fb5835513474ae3ca322dd. 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/8e9c94c1-e422-41f7-a791-e3a70bb356a5.json and https://artists.proofprofile.net/proofs/artist/8e9c94c1-e422-41f7-a791-e3a70bb356a5.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 0x5eb075a119c08df126669fc7d5d0cee678e3304b050b4a0f02e1ecfdf92a9bc4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFYX2138254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca7e9bda5e4fe35b39964fa938c7c49aef76de986d5f89ab6c9c4da25f49eac. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZFYX2138255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d5ac3b37bf6cfae9499ba44031cfa6cc827b618cb3be8a1474dc3810e963a0. 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/QZFYW2135909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d5ce3029c04f2e8a34f8df94e6f77a42e6c5ef66ccff85544644981da03c8e. 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/DEY472277697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b18c11ee51e74eff26e6a2137095128e461c4ed7b7ee4f51500295d0229ae75. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEY472277699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a698bece8c94a09d41ed29beef22f0993913632636a7bd673240460becb7f7d. 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/DEY472277703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b4f281575d55a7f6a9b985a29e8a9551ae9ef3a580f35f57d1322697a6995a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ZAC012400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717a6e9429d1e43b509364dd11c7566e1718531d2014b815e4812c27b34e276f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZAC012400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7511ab3634db29b52c7e43cde36729145e7262db2e86d6117a1e45a59c2bad1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZAC012400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe847ff3633aa305966b31c8370ecb2b6254ee92507fc260ebef54b2b03fa147e. 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/ZAC012400380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12581f45f346dd91a74d6c42ebbd00b54a82992704157e12cfc2efe155f65389. 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/ZAC012400381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbcd6f9b40dc67825e5c3ed630b1a000bed6418e78f8489e80901d960f0ce1c. 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/ZAC012400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd09756a82a601f08acdad3a27f0b1dd4ffbe28582629ae36c11601d0fffb2f. 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/ZAC012400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa33cc2ead316c68685b3f6ff481b39a6857340f5aa60639763305582f14d53. 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/ZBCHJ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2221ec07d3fc45458c8362a59cd16d0b2378e6a270b3a912ceb88c2af13333f. 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/QMBZ92494877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d01166c76f35e10dc57b063306104ac3e77b7dedbac70e5167214fef2db932. 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/ZAC012300355.
Wagana Nna (feat. 2point1, Gusba Banana and Prince Benza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6ebb0f09fc3a9a62d695773168a349b546f92ae1ed50127033989a2f31fbb1. 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/ZA56E2304303.