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 0xf68b7b82e5b17ecd91f715bb5ab8cd41cde176a05f658ea3390f1092b6040610. 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/f949601a-a102-42c3-9835-25fb8ec08987.json and https://artists.proofprofile.net/proofs/artist/f949601a-a102-42c3-9835-25fb8ec08987.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 0x6f46f7183ea57e048fb90a2d9dbffed25f4033052d8c2e161497328096ea8d24. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAJH2511944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a4ecd88c071c72eb9179506f62a43aa17548c33afdc3e6cc7d25cab436da33. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJH2511950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492f32361fb974da2fe80f920f9c253b27262d6624b6508e5ed5c13600ca7aea. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAJH2511954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16ab1ee31986b056cb83fc02e37769e930ee95cbfc7bf133756661685738e7e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAJH2511958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58f0119490873cbdb81d31f0b53787d3ea100b3b8806c57b416e3c5fc6a06c2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAJH2511959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c28f6f49dee04098221dd9f840ebe9f3905bbb40d0f10877d299bb7358e099a. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJH2511963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3771a120a77f0fe943b9e95de04c189a872c108f0cdd1089ee470a2416e2c5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAJH2511967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8b43582681701b3146b684c2535725968f4dc5621df0658217940c7a6c25df. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAJH2511968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c595edb92f337e088f13c98a87550275d4fecf246d9125aa8bd98679373b35. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAJH2511973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1640ea6f89e65f1104cc56a383658dcfc6b3739b46c1087a433617eda0291206. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAJH2511975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c95991aa60866e28f73d2f7422c3b1d8b7672fdcf6574b68ea89f061efb262. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAJH2511980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29f67b531b36fedbbe40b3925cec7e444c291c68528a94606530458e33f10db. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/TCAJH2511984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadff77b5d879c307c73eaa43c44f0cb60166d41e64947e8d93d3c4a15de7ad0a. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJH2511989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb059bbe0f26f057420955a8050bd999147c4f3c9f4731283d539ce71d8966c3f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJH2512003.
Só Menina Linda 2 (Muito Efeito Escondendo Defeito)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e447a131f1b3df677949be22ce990db550623c854910a2206c1da5e9bd39dd7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/US7VG2503351.
Diss “Mediano" (Ctrl Cee) - (Diss Leviano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0e60606884643ccbc89b0b7cc4cb9ba5cb81e95744b3175ba8447c436f3102. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZW9M2450347.