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 0x6b3239cff8f98520cdb84d50071227cb7febc3052bc8dcf7dcca3c902f145853. 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/007d5b9f-1521-4a39-8fd3-fe5b6c664c27.json and https://artists.proofprofile.net/proofs/artist/007d5b9f-1521-4a39-8fd3-fe5b6c664c27.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 0x5827c4f20df6b0a1eac4d38ff6b1f37c46269282ee27b67dea048657dddfd1de. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZK6K2058750.
Voices of Ikomkhulu S1EP1 : Mafavuke Freestyle
Inhlulabeyivimba : Cutaways from iThemba Lamavukane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3d0af194afab7cbbad88642c1e856f0449bdf21453befb8b0cf12eea9a9d8. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZMEQ2393055.
Voices of Ikomkhulu S1E3: Xamu Kavinjelwa Freestyle
ITHEMBA LAMAVUKANE :Dreams and Nightmares Of The Urban Nguni Foretold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6085fcfda5dd7c581b68733c187190c80c0f20cadb31d547e8115baba84924dc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFT2457003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a08e8169d82522d284689034d54e5f266372eadcefa435d2e4712bcc7b6445. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFT2457004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72480a57c559ed16a52988f214b1760c8e92e0a6cfa86d77b505cce1ddda5d3c. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZWFT2457005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5def19cec2db0106f9950b13ff43933c04c1118556bf66ee451e9b42db673e89. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZWFT2457006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f6e99834cd7ddcdc2e63798e98c9a570766bf37f0e38a50537e8f976cd45d5. 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/QZWFT2457007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88738de6676bc3145f31ff7f08216c93592b12c295a567c672f5997ca1c3abb8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWFT2457008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3515e1a4cf915cad3044638114a85f327ed2c30eeea2d128746cfeb5304ce2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFT2457009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a63243043afdea674bbd79abdd785c3b82d80350a38f2b69bd856695e25372. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2457010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2c87f74979ed3b12db7840b09d5774e8796f5abe1c6759c29fae83f993901e. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZWFT2457011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258038becf3d593d5903560e128ca64fc3fc307431eebb388ee448a9ae27bf81. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWFT2457012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94aca98007749bda6565831cb7f368370ede79f32e8e91d645e613e2784bd1e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZWFT2457013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445600f3f54ecd62345cdabf309edd4b780a1d23fa871e1d5339aedec1ccd7a0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFT2457014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e5528d6bd6850c284449b555034293fc6374ad80c5729c173d5ecfc50422ce. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2457015.
ITHEMBA LAMAVUKANE DELUXE : Tales Of Into Engabonwa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6085fcfda5dd7c581b68733c187190c80c0f20cadb31d547e8115baba84924dc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFT2457003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a08e8169d82522d284689034d54e5f266372eadcefa435d2e4712bcc7b6445. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFT2457004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557a0ca1550e4587f0c0df94c581c69dbd3f39cc7719b1625d10cc7045d82b90. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QZK6K2535519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c24bd7f100c6f2c7f2f54220091f13815d703204925e85aa88e5a70642c4ff. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZK6J2596481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc149eb08ada8a1d47069e01b2fc260918df49cc892b046ee89488ded8d0217a1. 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/QZTAY2546955.
Voices Of Ikomkhulu S1E4 : Terrible Twins Freestyle (Bonus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d0d685de3955ba2380315e94b1e527a29150250c5c87b9601c81c702879c03. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAY2546957.
Harvest Spring Capsule : Obonjaneni Ballads
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5305bc0d6ce1dd008a1d1d5c07b9e0728558cfa7d37802ded9ce2864467737. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZZ7X2595682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe36a968645e57956a85171a7a4dfbad3d7574ddff94753d2cbf4e851ba83c3. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZZ7X2595683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9bf8e9360ad5fac33d22155aa9e6c07fb9a64a203875a406ed174b3f3ee613. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZZ7X2595684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237c65159a94e26e320b60bd5bc42a410c7749069f107c9cb4a14cec73bdef8e. 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/QZTRX2346938.