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 0xa53de76b0479622f7cb107583e4b24ee5883910b462a89fd5980ce8ab0f8d542. 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/c12b5107-03a2-4b37-84c9-b0cff674e7e1.json and https://artists.proofprofile.net/proofs/artist/c12b5107-03a2-4b37-84c9-b0cff674e7e1.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 0x6e0ec83b06f59eef4cc0344e65ae8d172d957e0ea1e70429bffcdf7235fa5f4f. 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/DEY472374925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed995bc102ef56c5eb4c5e5b7c69b09bb0920380263e5479a579665cabf6721. 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/ZANVW2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0bca15e3ad0c5964e383f9be446f28b384e1e609118e4cce42181f4334c615. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZA56E2314714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc35dc82541634d7a4b3ef29cdd90261cc366893bad222645ec7d316abb6e588. 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/ZA56E2420095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd5fce63fa4324f2da107ad9288a8a61777dc74e878ec47d6a810e518ee5400. 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/ZA56E2315195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ee363555923ca66b89c20de0a7e3af4dc54894fec90a550c307272f0e91a6b. 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/ZA56E2315339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ec12d3a86a60a35a3dc59a061d4f5e7b706f0faf0a4f6836a75c4b01f26419. 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/UKXN22395324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5003595cfe2eb7713ae86129a09066be66435449f9f1bb4c0084a27d41d5ad75. 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/ZA56E2420497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b111d642ca08abab77a8057cdfb638a24051bc53cbfa6de0e216acb02cc02b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ZA56E2420498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366ee93d503063e9e926778f9066ac1605db55ec751caa6e9f8c62c97b90b885. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ZA56E2420499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713389e6320cfc320a1370ad4dad94d1ed5dc00e3724d15c6407ec736292405d. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/ZA56E2420500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4a72e168a4c52fa1a32a793a3665b7074aaa29ecfa48666ae25049288f23ef. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ZA56E2420501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efdabae7b45fe1de67b5c842ae4601dbc262453416885129b06937ee51082b4. 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/ZA56E2420502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b57b94a0204fa65d9caa7b975afa14fb6e455eb7c741ea0513bc0239fbebcea. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ZA56E2420503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b776d9445c960d8663fabfc3ac815da83f7f62295ca9b55e7278eb9e0b7f988. 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/ZA56E2420504.
Mal’eningi (feat. Scotts Maphuma & TurnUpKiid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e4625f72567f74c67dccd57de1623b0974648b091838ade163ac2f0247e228. 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/ZA56E2420505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb159af0af95c4ff3deb30039888694319ee8f9b86b38772df47e02734d98e6. 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/GX3Q92495186.