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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1de022938b9de59ef8b11115d2660879fe57499d30b8db322db8798698af25. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9624d7a4-1f9d-483c-be67-f6c320037d2f.json and https://artists.proofprofile.net/proofs/artist/9624d7a4-1f9d-483c-be67-f6c320037d2f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05afe325840b94e40d358fb9217fc69e67a219cb1c7e8352061b42b876a4bc4b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZAC012500680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d304deaa1a816dd0d8b55ce00df6975158fdb2474e9d62e24de141065f18a8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ZAC012500469.
Sandcastle - Sir LSG & The Bless Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ae9c809916c4651f514aa3e56517271e323bbc4c33cc388ed6ff754281a9c0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEY472474545.
Sandcastle - Sir LSG & The Bless Vocal Dub
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a23d088a9565964d2d776d19af52fca836f01b959a907bdc430e8c325af3c33. 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/DEY472474546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6921ea87e23756536af521aa12f33b9a2c2c3a734e718634d3a5eea7c244821. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEY472471447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d47403fbee0a3e91ec7038a356b49b07fda1f69cc8e06306704a1e1e83aa6e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEY472471449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc9947526d535372bbab8e125bf86a503732295e24a3004cf2a4bc7c79e786d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6G2262518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7d9dbc45ae77da14e8a4cc7801c1940afb2050f05e6608d1980a1c5fb4000a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZA56E2419829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6956deafa3ae5925007802f6b2ea27fe246d4cdbcd5c6d83c8eb1df783358d. 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/ZA56E2419830.
Umjolo (feat. DJ Jaivane, Mr Maker & ZANI)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3658568416822dc1ad9f0a33d918d9c8dd15b8e18a332f5b0209e6ff53c10eee. 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/ZA56E2419831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa600c39756415d427d1f82bbc8164448d63bd6ee7dba9c3f2c8c9d3e97b415. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZA56E2419832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd0cb4ee9f194b1a261bd15bf4ff878a32b479bea8ec65d1e4f173373e3385d. 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/ZA56E2419833.
Seng'khathele (feat. Ciniso, Sighful & The Bless)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc05fd93f248bec9896d083293ee178ef2bd67e0c9c5997ed274eb6bafac9074. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA40S2500144.
Sandcastle - Sir LSG & The Bless Dubstrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234c6463d7b3469c40d8ce63541147e29fe4dce70149ea8b2054e1cf6122b57e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEY472474544.
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 0xfb922994cc7ece81bfe7d0432f99932ef85c796381836cdfe25934da9a12ae76. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEY472471448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1d83daeca05fb012c4b6f45779c379c8f0d7d16b0d2da7ba1a18bb57f52d7c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZK6G2262525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5bcc172dcd07d317025258c3af226b0dbf08cde60595fdfe461fd9a8314211. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZK6Q2193789.