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 0x82b499e869fc6fb6a4fd9ff8c80827bd367421bc41fffef98f43f49d86d3be92. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/431facae-2907-4e8c-a39b-56f477d341ca.json and https://artists.proofprofile.net/proofs/artist/431facae-2907-4e8c-a39b-56f477d341ca.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 0x0dda8e4a03bcddb9298d44ad94e47fbb27d1d23b1763d13388f8b84da323f137. 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/ZA56E2416220.
I'm Busy (feat. Zakwethu & MENZI BIYELA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ab3bd98101bf750cc1d3ee2719fb2f1ac0fd60a3aa997881836cbc041387f4. 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/ZA56E2416221.
Babe Ngiyakuthanda (feat. Drama Drizzy & Minero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd897cb3b7c9fb84a652d44866c152655607fb62e0c9b43901511693752ab8757. 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/ZA56E2416225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fdecc22f34a6896d3f3b0aac875aa613af6bb21a2ad00c8de3c679cc89b8e0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ZA56E2416226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8dbb36bfd5b431152c45b61e674dda5079565a4c25b7f0bd02a694cad50961. 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/ZA56E2304018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a223194322aa0134a8973dbbe762c26e021caf1b58df1fdb86531f3ef4ad9f1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ZA4LD1800111.
Ngisize Nami (feat. Nokwazi, Casswell P)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e5227fc1b3f91641697b16c4fe025fa55264a08c22a531f5a8b88fb49e4af7. 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/ZA56E2201128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf00f25dd6a4ffe2606a25a642a9beaed6727602479e13bde23f32d61623fe9. 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/ZA56E2201533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce0afc091519f03515cc0d86f6668882e47955ca19327264b9eaedc73ebaab. 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/ZA56E2201534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b1821b4cee235f4ee92226b326116e99c37225a066e46d8ea152464147a397. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZA56E2201535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b220e68e685b5864053671d066a71df1ac19f436e403a91d09aef7ca5b5878. 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/ZA56E2201536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb3f8d66802ee3db7dfb5a3f494dd93ae006ca0800b1602fbf0398e70ca03cc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZA56E2201537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4be4c515a9f4106ff6ffebd3a3f7d879cedb199d7404f9ff8ff952bef28973b. 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/ZA56E2201538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb609727ab5ca2182e13160f82e081d20548aa466774b627b1f956a01e86fe1b. 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/ZA56E2201539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98e54b5bf3916b53d9938b5c1cca30adb60bc1e9a77c242fdc9a411d155e57c. 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/ZA56E2201540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f743e5f0ff12fcd2ad674414f77b6dd13f633c8882e3d5872a61502d4abf5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZA56E2201541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2646e68c7d2269fa4add49cea91c4d4db6ecf554b918599b81e22cdcb649b1. 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/ZA7IZ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1119ce8fa06cd155f37eec5875021a40e77a808de7ca330836c9de3d2ea1b30b. 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/ZA7IZ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ba1d26f163ec63d67240f6bdd1ca7ce58d51623a88a9e294ec30ae4107401a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ZA7IZ2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947580da7d5b9a0db83b09392d7b25cd4993829800f1722d6b9da98abba4a696. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ZA7IZ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c0ab2531212cba49e393092a8b71c5f8bc533f859a20727eebeef7eafab1e. 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/ZA7IZ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a511aeef761394b2f78e5a832feb825eeb6c8a4a40fee63e3bbddd59360a826. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZA7IZ2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0523e6f60607d406b60fbaac668ab5f919909ae29382b015f4c5fbb30495df. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ZA7IZ2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab2a94c1f405408489904459b294c6aba1777ece4e2ef66da43ccac5fa58bbf. 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/ZA56E2201774.
Lunqobile (feat. Thenjiwe & Newlandz Finest)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c4153839bf7d57e92d2c71d0f59cdc54051f7b9fc82e35399b3b5471ed778b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ZA6EO2000004.