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 0x88b64cfe42754138a3aa639822cd9178e39f3a7798f8cb4ca7ae683f0a191eeb. 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/80928e52-5600-4e60-8c0a-f810f5a16074.json and https://artists.proofprofile.net/proofs/artist/80928e52-5600-4e60-8c0a-f810f5a16074.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 0xc6d78d60db241b921841031cfe864cfe0b5fc9d83edfbe5e1f876c66743d010f. 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/ARG991019977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b193b8fba4108a3436e4f7355403a7468d4a629776a66600de11eb99f7cbf0c. 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/ARG991020553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ecb88ce980f425f31f70c09edc4ad0ddf963ae3aeaf638e9b6b46f5f9ac6af. 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/ARF861600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8537ce58f013cfba68a0ccfd55aec7af32df9548522fc13d1b2675d846e2ba0c. 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/ARG991020357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d801cd6accd2d4cbb9461c7cc8e4449724b54f9a29efd86f08c4494abfab5. 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/ARF861900002.
El Verano Es de los Solteros - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff9c780b1ee35ad78ced5a2df8d8307823cdd36435348327f918ad57493f067. 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/ARF861900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5efe3983b6a3bc2b1c0c96fbaeef2218e2630efa5f92327ff69a83b278becb8. 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/ARF861900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c9df4c2fcbba49bfb6711f0c23f81c0007e55765702c8474e292371b0a7bd7. 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/ARF861900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c726f2d8f79557db098542520d6317f1a33ffe96ce8db732315a04e878024. 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/ARF861900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ebb7e7fa280128ad317fb1954c788855cdcd980d367cdcef3b6c6cadc08948. 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/ARF861900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11068ee2a5f3179317d145084886d015dabcde6cfa93808592129b630908a6. 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/ARF861900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ecb88ce980f425f31f70c09edc4ad0ddf963ae3aeaf638e9b6b46f5f9ac6af. 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/ARF861600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b193b8fba4108a3436e4f7355403a7468d4a629776a66600de11eb99f7cbf0c. 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/ARG991020553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8537ce58f013cfba68a0ccfd55aec7af32df9548522fc13d1b2675d846e2ba0c. 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/ARG991020357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d78d60db241b921841031cfe864cfe0b5fc9d83edfbe5e1f876c66743d010f. 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/ARG991019977.