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 0x44e3428022c274750880a8b645e6a9da4cb9171dc39c5f245896802901a6a3e2. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7c20d44-3090-42ba-9576-18886b745e10.json and https://artists.proofprofile.net/proofs/artist/b7c20d44-3090-42ba-9576-18886b745e10.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 0x4693f6188c5802fe242a7a07b20ccd0fd4317c9433193aea4cb83c5953976adf. 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/ZAC012201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47e28ebf6628ebca5fd4e2a2a5fe252553c5c53b14a6d1587894799150065c5. 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/ZBEX02300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785d86f48cbb5ad8b573f2072ce6ece7e1a05883cfe0b9ff102243bbe0c073b2. 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/ZAC012201425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4693f6188c5802fe242a7a07b20ccd0fd4317c9433193aea4cb83c5953976adf. 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/ZAC012201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846cb9140411f63cd9d65b2eb9dfda1a93bd3b2a8b27f196ce10bef020bcbf8f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ZAC012200757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634254ee7c2b9e619b5b71f33f1506603d1ae1c5be07d3539be865d6c5b2f10e. 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/ZBCHJ2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648b367f5a0106e34ef34217440a4395f8ada12035f80bf383969ad8a730cdbf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:49:09Z), 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/ZBCHJ2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9d544aa0eb4713a214b4f7f02851be0238648d167c2e9f3edcfda4aa7573ac. 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/ZBCHJ2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6c0ab3c4047088976eb3dddab83f11eb733ec851741b7b883b9ed6b130d86d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ZBCHJ2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565a36241164d6e2f1b7488a9db253da755be6bd82fb98efc5ba365864bdfa6f. 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/ZBCHJ2400031.
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 0x5f4e6d388fbb96c1867dadd3ba5d05236865b5d0a84e0a6676435923baa3ec08. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ZBCHJ2400033.
Emakasana (feat. Aymos, Kabza De Small, DJ Maphorisa & TO Starquality)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188941511b77f59a8df2ec13644ad6d665859909f6efbcbdc144dee7930dc86f. 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/ZAC012000348.
Joni (feat. Madumane, Daliwonga, Vyno Miller, Kabza De Small & Myztro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35b2d980e8df15e43b1e0961eebbcf083e4838d8099de97cf1be8402d9df236. 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/ZAC012000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5055e094b7d8724ff1407ae3cebe9e00a59cbad7f99d5be28ce4920cb4d5f65. 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/ZAC012000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12028dad22644391be04b10d54709eca11db99aff9a758345d8d1160ed05d00. 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/ZAC012000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c495bbf3110317d3f923a8095d03d39c5d3113ca0e35d2903eb08f0fd1dca3. 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/ZAC012000352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b57282dd8830e7eb630ec8e89f38c6d8e706e293095fcca0ba3cc515b294491. 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/ZAC012000353.
Jwala (feat. Daliwonga, Acatears & Howard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff1809578981c91d9c2f635e4e72b7303d5b79c8d63c44dbdc1964bd6e04952. 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/ZAC012000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81916bb291c33c5ada1312b4df6030669a708a75da7687a7b29c03ef5025675. 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/ZAC012000355.
Emgroovini (feat. Nicole Elocin, Mlindo The Vocalist & Tyler ICU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971d261683b4d4c716605027d812e41b2ccc9d111379b1fb2c54f1e7b88f96ee. 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/ZAC012000357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ed6bc85888e168ddb0399937689d9c5f5c608d464c3af6ed069a69b2518402. 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/ZAC012000358.
Bula Bula (feat. Aymos, DJ Maphorisa & Kabza De Small)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d9983988e7b096b721c29884619596c8f04250f82809a211adefbf18d481d4. 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/ZAC012000359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16eac8ade17d351eb55e25d298e95c567431d6b21ea34768d0c08bcaf4d1f277. 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/ZBISC2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c44a799c9f584bdfcc0be3da34c324b3e6642f616c6bfb441cf09db1620165. 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/ZA8YF2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6681e7b961e6d7bbffed2fa5b92f6699d5da89ae5e2b75a52b75bf17f16deb4. 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/ZA8YF2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9bc2cf138ddbd8a956a3921085e2221d14493cee60d5866ae3d3ced8174549. 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/UGA2F2300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99936e13f8f1431c6c798a56a55e445c6eef0296908bc68d073e7a465f700ea8. 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/ZA5MF1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6681e7b961e6d7bbffed2fa5b92f6699d5da89ae5e2b75a52b75bf17f16deb4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZA8YF2100022.