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 0x5f877939fedf8560170457895f25c5b682282702a97bee291b93a40ebebb98af. 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/dac376dc-77ed-486d-9888-c274d2ae8fc2.json and https://artists.proofprofile.net/proofs/artist/dac376dc-77ed-486d-9888-c274d2ae8fc2.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 0x3ba18c4ec20b53c386ea8b15251a80e5961a74062419bc0c25b6da76713073d0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USZ830300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c2bd1fb10d93a5f5275da944c9da4fa6ede4c34a8fec3f879bdfdd6461fe29. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USZ830300212.
Cubaton presents Clan 537 (Reggaeton Cubano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c10b151d80f4ae4e84061783bf882ddcdb5f875d1f1ad8afc3d50347784b04. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USZ830300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf704ec08e0a469a2e6664abfebae5f8cb4e3c50a0070b8074935676d416fbee5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USZ830300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6df9aeccaa92a199b068d7560db5890cb18992a6d9eafa7d4d850fb760b04ea. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USZ830300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4839a0636349ee2f94ab095f6bcd9bd14e3c3887e6fd32432c26adc971e9c8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USZ830301302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fc5a5cdfcda943eaa68c587fb8077f7066f321d79720347bc9384dae65ff09. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USZ830301304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c3d4b66174497800a0bcf56a4a24eb76d6c77066a2005196150f19875a1cc2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ESA011877835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088cfee8071680d1cdf490cb827af50ab46be99d939c3c0fc00db962a9173ce7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA012174320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eae621cf9ec9466e657ca90e865eceea26c6ab0edc7fdd142bb5fc2994c9572. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZEZZ2100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460f593edf86a85f4ab7ff772f9cfa78b1081294d5baa2c65892a8050d3a8a91. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZN882241370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c72dc123eadb2d1dafb3770fdde9d02969120e1b6a1a4f87d2ae3ce6e2c8cdb. 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/QZEZZ2000807.
Cuba presents CUBATON (Reggaeton de Cuba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde32d29483ad3a6ad789eeb0ffac871ca0b692ccb1b08e876b80fdafcc8d728. 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/CH9181160038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e6fc8386f8249f4e88a83bfae609d5bf9830147d8e7131ddab69622d258fe2. 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/CH9181160046.
Strictly Latin Dancing - Come On Dance! (20 Ballroom Hits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dcbba79b6b387572a914e96a804dc0410afcadf43b4b2025cd93baed27ba9b. 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/ITF250700209.