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 0xfd5d3bf14374b6bfcac96988c6fcb95a11e45971d4a064da4ccfb5191d69d233. 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/527074c5-0ab8-4743-90bc-ef334fe7cf4e.json and https://artists.proofprofile.net/proofs/artist/527074c5-0ab8-4743-90bc-ef334fe7cf4e.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 0x989a6801846fa90ee2634730cefc8be0f88f01b649d79311c500e0eed91283d2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BR9Z22200124.
Acústico Altamira #23 - Mulher Nordestina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574dcf248f5c790aaf3a91585364ff05f912857e884778e2339a0c67a71c9c49. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/BR9Z22300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ed26a0105147ec335b888da3cfccb85da8d902f901cd3db74126c043eb2ce6. 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/BR9Z22400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ed26a0105147ec335b888da3cfccb85da8d902f901cd3db74126c043eb2ce6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BR9Z22400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde191d4c136b51a1ca498bb07c387053a4ba390e1ab107b7a4db638d089479a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BR9Z22400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1301ffa3eae3a2205dd0a3c6b0766dbc713d730c4c6741b29cca586ee11f5f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZTBB2455363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92a7c916224131f6702a05aa58944859fd93a516759bbefa6570c4f0c42c168. 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/QZTBC2417214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee4a1ef72f6232567df5e5c0d211278fa60db3bb4dba9a090d681d505d93a64. 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/QZTBC2471609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eb429f317c38ecee978e3d82e1d83eaf261c5d85f7738366c38953c534c6d7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBC2477233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb15b088278674e3d05347d819395ba7a18e796d8c97accfda0dd67185af35c. 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/BR9Z22400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cb298cb9b84a02fd5738076db4aa70fbffbb645e707f843da5d91229287d74. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BR9Z22400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f3bb2956fdf64902486a15fcea47b9832e4d4ff7e75cd6d705f045de0e784. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/BR9Z22500004.
Acústico Altamira #25 - Esse Tal do Amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd972542ed5858280329406b7d16435e860d0393a1e97252b04d0e177b1bce6. 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/BR9Z22300134.