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 0xfabd6cb549b6ed9e34f5ee1f66713763c250da770e8caa7d496f91774cfdf523. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65485a69-cfd1-4487-89a8-3a991b3ecf69.json and https://artists.proofprofile.net/proofs/artist/65485a69-cfd1-4487-89a8-3a991b3ecf69.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 0x1a87aa3db37d326c7fc021e8cc8f49ad5a41d3a2f4fbe2070b255009a04e7a2c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMEN2095781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43b8e1c35a3150934e46ce8c9221d29eb9e7ce6c5622c9b1b34fc1b8de69413. 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/ZA82Y2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4898759054328cc52909fd26efc4a29d07522c8a5b1a8ff2f1c9231c1770ba2e. Chain 2 (Bitcoin): anchored in block 957210 (2026-07-08T18:28:05Z), 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/ZA82Y2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a948ae2058a566055abe755de90e3ea2e463d5ac6c59ea37440ac96f755046. 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/ZA82Y2200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb3990c06640ff65843adaa795aeca01f054ef12c7e682b7ad312507b8f6abd. 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/ZA82Y2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19d8bd968b98f1ce4f7d0d137a4e4eb0589ee241b50a2aa8dbf88bd0a32ba62. 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/ZA82Y2200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ae7998c0c072af594bb55f55c41503cb948e243b591b6f97115ceb7752a083. 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/ZA82Y2200154.
Arali Na Ncumbula (feat. Mkoma Saan, TuksinSA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c05dd0a4443fbbdcd31e8c230e2ade805a2f81919b46febbbe24e713ab2919. 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/ZA82Y2200176.
VHOTENDA VHAFHASI (feat. Miss Twaggy, Net So Production)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f66108b00d2030e59e223a5efec3e1a7c1e598c0e359308b89c725475d5b55. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ZA82Y2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9522ae44078c10e1e89421921a8b708b6f1bed7c60b1119764ec4a4284b23fce. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ZA56E2415606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f77f6117474c6c11290247e24439ebf48d701b0363c7886d2d4906a7c14e39. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/GX53U2350404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b659f133998bbb8bfee823256b0a2cf18e9c7e6977b8891dfbfdee08aab26d3. 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/ZA7A42400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e05ee8f8ce5d98d617c03c66a2f7164a9bf140577f29a6e73f1016dff98eb0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ZB7A42500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97dcee89ece99987808c0c78c97926be69d11f5f72c28a2dff90db7d9f9d103. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA052539907.