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 0x1e64458674c9f5b6213e87680f362f1932187025bd16d7422bdae6728da32635. 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/e92dbf4f-058e-4799-920e-710ff7e1d1fe.json and https://artists.proofprofile.net/proofs/artist/e92dbf4f-058e-4799-920e-710ff7e1d1fe.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 0xdd0c40f457c63b1ac37ed1263220497eea8ee722c138dc0db234e7c52bf40482. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BRZLW1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1f11d630c876e839a25137f8c2787204ea2e96443b685d97344d17d9776d08. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BRZLW1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9c54f5c6f4716d4d2c0a507626645987149b75e2cd0e042e0f0d967c88ca10. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRZLW1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8172014896f2fc19407fd6f6899ab012a7e437bc7b7873c4598de04387a61bf9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRZLW1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b72e8aaecaaf840f959e30116bb8ad154ac457660378e9b72bc909aa01d3e4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BRZLW2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141349246ab9058e81ab9fb67d9bcc9bfb260c1387150fbf3a1c0c8740184ad8. 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/BRZLW1900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dd9044271a7a8570ca6d4c6ac3a2f070ef83a757d586c91c20a89d81226f18. 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/BRZLW1900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8d5b140248e2b2afb7938a3e88ac309c4160718b947fc341f1c850d40cf8a4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRZLW2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dd9044271a7a8570ca6d4c6ac3a2f070ef83a757d586c91c20a89d81226f18. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRZLW1900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08e77f473347fa6c0066f77e89fc282e4cb50dcb9022eab0b355e1841c2fccd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRZLW2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e9813b0e2f9bd4eae280446d4bdaf770725555ee6d138b54c2de8d46b7f9b2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BRZLW2000013.
Maria Porta do Céu (Maria Passa na Frente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ef09bbc2033697db4d22acd46bee546dfff83766a883ca18d53e108084c04. 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/BRZLW2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89a9d44bceea981e688e56b2c74010efc6bb3c67754e1349b99f3112478f6ae. 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/BRZLW2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108b3e5a49acc0ab8f592e38df48b64ecde374887986e526cc697704249d1bc8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNJV2375043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3ba0dcfcb2a0ba275dbb883fe781e679ef26e8acb328892106600072ba02f. 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/BRZLW2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b93dcf60407a56a8c19a897bc23be70e6f067ebfb93daf9488592287471fe3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/BX3GP2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3ba0dcfcb2a0ba275dbb883fe781e679ef26e8acb328892106600072ba02f. 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/BRZLW2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89a9d44bceea981e688e56b2c74010efc6bb3c67754e1349b99f3112478f6ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRZLW2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b15ffc3fb67167433c7a272b2aacc8127a290ae0559f6fd9bd441f4e9e07e6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRZLW2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc4818702ad069ad00035d2b481f7e83999f4ad8cf73825912ede757a75dd38. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BRZLW2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd29d95de9c4951fd129aaead3a8f4770955011837d5428b7e5226b172ae44d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BRZLW2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9316068335cafd9c7240977a42ec28fd7324b73ac13b685faee0ffa8ee71cd2. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/BRZLW2500005.