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 0xd30c1e0ccdfce332075ac40f9481c5f766a53904b1885d00742798056cd76140. 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/05265779-ffc6-46f5-9027-449dbf7bc814.json and https://artists.proofprofile.net/proofs/artist/05265779-ffc6-46f5-9027-449dbf7bc814.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 0x86740bc5b71c24d6523273c56a8f86fdf4fc1c3ce4e67ef39ecb37fca893b600. 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/ZA0AN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ae8138d9c582e26c2026ddce30404516624d8a9f381684fbc514b5e919a412. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZA0AN2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86740bc5b71c24d6523273c56a8f86fdf4fc1c3ce4e67ef39ecb37fca893b600. 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/ZA0AN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cf9922e10345443a87a48648ed90efaa3ca2dd2e1dea2018efadf7d21c38b7. 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/ZA0AN2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3825b6b057333796305c15b0afcd14d93a181540a1c9fc0d41c13b10698a361e. 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/ZA56E2306503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173d73398baa3082e0258c96494c66098259e2e20b2babed6219bee373b52e40. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ZA56E2306501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0570956631653d8a7d14994bcdebe927a239026899e8aeaa96a6bf50b069f247. 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/ZA56E2306502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3825b6b057333796305c15b0afcd14d93a181540a1c9fc0d41c13b10698a361e. 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/ZA56E2306503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659578c2b4c3c85070e828df7a4838819ae3bab63ae7675d46d1cfc9b7099124. 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/ZA56E2306504.
Dior (feat. Optimistic Music ZA, Leandra.Vert, LeeMcKrazy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f11df6e0d54692b37e0d64e7ee5a8cbd540cba50d28210ac48d41cd37dfdb04. 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/ZA56E2306505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410c1d257cd8e65ceb535054d7570c1ac985e0ee020b3d95bb3096927b714da9. 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/ZA56E2416829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110b8e65a98c7d1dd76436a3d1007b54106a3ee1f874b1dc71e411ffbd84d43. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/ZA56E2420651.
Emazulwini (feat. Young Stunna & Leemckrazy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93607ec935005b922de1a5d8681efddb8bb8eb50c97b9d31da36a2f8752e535. 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/ZB1OS2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08db767c4ca23447ff0afa60aa44fbfc99fc08116707aff98fac10640a9b88e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZA82Y2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b57f08c9a6e6d32758de95c7c6e889d1ec2c8098f39a12337f94006a5f50c5. 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/ZBJTN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4634a56859ae2bbf1290cc6039be1a1f1f7c2c48286ba188c083529db066dcf8. 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/ZA8542400019.
Saka Malume (feat. Tumelo_za, Sayfar) - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352d7a5f73a11d23d92c76d552e0920334bcd4b6df713a2804d9b7f4e2a9183c. 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/ZA8542400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66499abf550e59c1fd22637cd44788432139b4176885a71cec3149b2ac95bd5. 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/ZA56E2150046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953927f622f5b4d2aca16e9877844e37d567e83a94718b4932033f2a8e27c140. 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/ZA56E2416683.
Bhuti (feat. Chley, Optimist Music ZA, Leandra.Vert & W4DE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2dbed12f3445685b098ae33e8914f4d52af9147212940f0024ce0faf1bfdab. 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/ZA56E2416687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c17b1c3d09e8af27dac8ca6e36e92f7e2284e2b1170fa7fa730285e4c7d217. 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/ZBC042400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb72d80c1ae795be34fa96fa3731408c5e774240cff0026021c723286f689b97. 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/ZB02I2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc967ccb0d9cb385b4937dc676f5494d9d0898e153885fd83a6a7a5cf94f72643. 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/ZB02I2400009.
Ekhaya (feat. Sayfar, Toby Franco, Konke, Chley, Keynote)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8012f0e021ca16030b0101e49c0ed462e87d4b52297d1d9db99062464f494f. 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/ZA8542300007.
Umsebenzi (feat. Optimist Music ZA, TmanXpress)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2799e7d2d7c019a04a27138fe7462f60c6e4f6daf21ec3ffc446c2e7181f88. 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/ZA56E2304265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58e64a7c09f15ecf80013deadc00af3cec07166f023fc0e9746648c691553be. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ZA0AN2200019.