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 0x8e53938358d2e5d8b2cc24b372a7d94c691d2b32af8b952d6bab478e66ce9c6f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f1a587b-9ab2-425c-a178-415e827c71b3.json and https://artists.proofprofile.net/proofs/artist/7f1a587b-9ab2-425c-a178-415e827c71b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cinco Décadas de Rock Argentino: 1966 - 2016
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 0xcfda513752f0465ef84c6f0c773767bdb259956c3acfa374fcde0a5c59f9cf5b. 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/ARF100200010.
Cinco Décadas de Rock Argentino: Segunda Década 1976 - 1986
Nito Mestre Y Los Desconocidos De Siempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfda513752f0465ef84c6f0c773767bdb259956c3acfa374fcde0a5c59f9cf5b. 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/ARF100200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2a7b2ffbd43a298bfa15bc58ac9750a8f2b32c3ace483a231beb137c19fe78. 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/ARF100300721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beb49d9f2734703dc04f2523ca1219de5edbbc3b9b2e55e2ae0ce6c6728823b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ARF100300722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f9d489e5c69b04dfd0b0484afc14aaa88ff131f00175e8cf578eb6ce7b25b3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARF100300723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40186731f2d9939829fdda5c95d5dde28ea3839041d481738625c0579eb23bb. 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/ARF100100489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c885f387e0e6c08a3294ddddd8320e47920bcc3a234c63411f3e5f7f3933ed. 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/ARF109902802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeca6dc5d7cd6c5be420f6a472d99bc73347dd9b2864433a9230c4fdf802a8b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ARF100300724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedf6f5dac317584c7858c6553aa08482206534b9e9abb7abbd320ceb11718bb. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ARF100200042.