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 0x8b5235d0cd09e0f5bba067d5da0152b81960790ceb232640a159f3dd3f1625d0. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82efc208-c8b4-4511-8773-9c6ed40c6665.json and https://artists.proofprofile.net/proofs/artist/82efc208-c8b4-4511-8773-9c6ed40c6665.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Siyzihlobo (feat. Fakewell, Scotts Maphuma, Mellow & Sleazy)
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 0x2513ed20e9c075f5ecb4b05574b83166f43d1df95df8c61af558faff9f560fb2. 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/ZA56E2314966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ba267200aacdfd062f160a9260d52b92f27cfb56a96a3cb40bd0e5eb4ba0bd. 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/ZAC012500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9aea3a578ce6cf2787260051a273e746a43dd33cf1d390cf067fdc2f5861f2. 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/ZAC012500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795b1b46ff4181c740268e7d17b37519b0a2fdd960be4a9394514bf8ce7442b7. 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/ZAC012500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021f4cadded0bb19e978d24a1d3dd8bfdda50b098ef79a262b8e34ee5cc86192. 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/ZAC012500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ecbd35f492d470fe3a0eeaea770bec7d7b1c630e2c2aefd02084faf4028f3. 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/ZAC012500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cb436b66f94044eda636974745733a9d9e219467d6c63e8875546f2b84421e. 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/ZAC012500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b571d51af48a27ea80f07f95aab23482925bf935aca13737a977f2113b1e5. 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/ZAC012500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b923249d726c1c28fd1bff30dfe2fcb70f3d1f2234f555f8832edac3cd1cd7. 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/ZAC012500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd035b55c0df5725e904a83576ac2da58a3e808ac60c0b63cc2ab5d8b16e91d. 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/ZAC012500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa32803bd3c75149639517cef649a4f4683b217cfc2c94efc10799202c9f455. 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/ZAC012500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32f0b4c01a6c38ed8e8976e2276bba6730fd4143b090ead862c06f1814ca035. 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/ZAC012500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21deb785c18c3cea2ca2aeceebd8fc2376fef990d8f18f116f80c5ba924cd09. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ZAC012500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee1e0a4e5124ea7a34b0e5b2a0eab4a8e16e775f15667780a84b6fd39074cc5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ZAC012500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373f1f10dcf91054be4989f0eaac04c43078428305b433100c701cf67d624ba1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAC012500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538d15857e4e35d79504698affc68a4fd37fda78bdac69a2c84d3e7ba0444266. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ZAC012500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b067824908db6dd92513d92ebf1ed00146d02f0ef12e7647f7e7c5bf43ac9e4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE6TI2375387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b1fd3b23908fcbdf7a2796565d80b7d0b302a6c4207f95b41e3089e13768b9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SE5752486626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62813ae9ebf9d4fc4aa421305ed93e3413fbc2fafec31493c7ebe9bfa859f6f7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE5752486627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf614cff5ee42bd2734a0f19e66b229f8db15846867149aee46c2cfd0774fb583. 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/SE5752486628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb321841ab5b449e4f83e019e846b60072d8cc9a945717da3bd9b612ca6620610. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SE5752486629.