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 0xb5b4392f0afe9eeafd0d07f3f8b6e5e57102d03e87273f989b9c373043efe474. 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/2313c7d7-0e23-4197-929a-9470f5486c7c.json and https://artists.proofprofile.net/proofs/artist/2313c7d7-0e23-4197-929a-9470f5486c7c.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 0x0c608288576060408fc32b235d04843d70451701df091ee8a45be2cd7d603227. 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/ZA82Y2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165df2f246d41e2eb1b0b6501b2afed01cd867624fcae5a370dc8d3c425b5ad3. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ZA82Y2300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c608288576060408fc32b235d04843d70451701df091ee8a45be2cd7d603227. 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/ZA82Y2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0339941d7e3ad46e5b03bf93efada9594aecf5489b734384122e6baa7d231080. 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/ZA82Y2300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b333d97d2b2b40ff16adb09aca813550b7e09ac0fe1e677e1a714e7a0b025c. 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/ZA82Y2300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165df2f246d41e2eb1b0b6501b2afed01cd867624fcae5a370dc8d3c425b5ad3. 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/ZA82Y2300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302461f14e136d73c939353a7c4412e1b6e8a8e535772242e12e285eff2d7fc4. 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/ZA82Y2300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43774a8ce3e9cf5101ad124d43bf9b0a682b15d0f9b6ff0bfc2e63c258a689fa. 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/ZA82Y2300145.
Kunini (feat. Rethabile Khumalo, AirBurn Sounds)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b62fe3f7b5730f944363b59cbf76d8761ac4e0cd87857b34253261bf6f756d4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ZA82Y2300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb79c9367ea297ba5cd77de149b9573a72c155bff9e14c5834309835af5bec0. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ZA82Y2300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e97a4d8e87cf40704c8d700580166144b758e0f685f2b81010c4d98290f0c64. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ZA82Y2300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04c35e98264e822114407f6ff818e8fabe24394de03139d5ba61bbac1332374. 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/ZA82Y2300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d5f3a61614331e72e1551301397bd2e191ce7f6715cf3b9bc2bce53034bf86. 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/ZB1BO2400012.
Maxaka (feat. Makhadzi, Mr Brown & DJ Dance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545c4c335002be8db5aff2953830b187c5bc4973c3d1768a74ab065fc37c5108. 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/ZA82Y2000175.