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 0x5dd425086d591c60ea9ea817e59ed461846b1289aa5fc77651642bc57a2859bb. 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/a2d13d3f-b672-4f22-a0bd-43dbc2790c34.json and https://artists.proofprofile.net/proofs/artist/a2d13d3f-b672-4f22-a0bd-43dbc2790c34.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 0x0197faaf6ae670c846151b66b8d13f16f1134ab287a46067f4e4795b20f7c248. 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/ZAJBA2407015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53295b60e4e44373675ce879ed03b7253e0a1cc7fd5c32d5fb9981e56521f8bb. 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/ZAJBA2407022.
Emakasana (feat. Aymos, Kabza De Small, DJ Maphorisa & TO Starquality)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188941511b77f59a8df2ec13644ad6d665859909f6efbcbdc144dee7930dc86f. 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/ZAC012000348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81916bb291c33c5ada1312b4df6030669a708a75da7687a7b29c03ef5025675. 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/ZAC012000355.
Sbali (feat. TO Starquality, Xolani Guitar & Major League DJz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0677d4b7bda65602c31ae62a203e42d45580291d92b33c14bb5f371daa4c905e. 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/ZB1OS2300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ee41b3f79ea4380a5b7abea2c416605bd63c3f14ceeb3375b9e0791838650e. 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/GBKQU2274122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f15f38e46b48f715e14b91f2f72ef5b8e01de7510b93855b6a9df054715f5b1. 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/ZAA012000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433047f8633e2c3ef024e32efcf97d193ef03eae08cd19b6745fbaa8f1b834ec. 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/ZA56E2201741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836fca5390c3130437a5fe9a9187c8319674ceb1d68fc77fa24e3a8f36a18de8. 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/US23A1535963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddedc620da6af9b84f43af91de7aec60c7e0ec021dce2decde9390cca6993022. 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/US23A1535964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836fca5390c3130437a5fe9a9187c8319674ceb1d68fc77fa24e3a8f36a18de8. 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/US23A1535963.
Amalanga (feat. TO Starquality, Chley & Kabza De Small)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36085aad51e8ea01bfdba7267d24b53a7f56ac0f0071dc8ae43097e606f1bdd2. 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/ZB1OS2400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab79a62cbcc3eaf3b6eb50afaf6f3e6ced1f750b457d0c4d542b6f49f76934a. 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/ZB1OS2400329.
Amanxeba (feat. Daliwonga & TO Starquality)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e9d535c1334cb7d9bd51bdec8f1e2fb51639c07389bcf08b741136a2347e5a. 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/ZB1OS2400332.
Amapiano Mix 2024 (Saxophone Edition) (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085226444d476f9a3be9eef0f56943f0f632347312db24fa87c5269a89dc1219. 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/USA2P2468815.
Kumnandi ebusuku (feat. TO Starquality & Madumane)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219881588087c2819c5a2f326ae457da44f4462b8647c586f406ea0d380e2941. 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/ZB1OS2100006.