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 0xd3144968d556b927cfac6669a6c472023700c7ef54ca85aa279d5e8c199cff07. 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/af3765b3-0457-458a-9dbf-591f2e301b53.json and https://artists.proofprofile.net/proofs/artist/af3765b3-0457-458a-9dbf-591f2e301b53.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 0x10e05fb39bf70017d0fb7787fbc71f8afdea0d0f5c68dcb9584d6096b68e9b2a. 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/BRIP50900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69ce71d15443b3ba60dda1f21d6fe34c35d7212613eb1395f69383beb03279c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRCMP1500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4bc0b5d716370d9872ed43fb65a5ff4ebe628b4e122a0cf90201769afe29b0. 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/BRCMP1500430.
A Tarde de Maio / História Narrada de Nossa Senhora do Caravaggio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c898cc0739bb80b6a23c91808d79c36ca3665e1af6378cbf67ff4fa3ad46e79. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/BRACT1400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57771c09b576ab72efba913aac1708f355d2ec3ca1385d3833c10765f062dc8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BRACT1400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c072c6cfd57b57a1a01348210cbfca6bd18b229c7b68618eace96dfb0973d5a. 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/BRACT1400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314e90af7797b96cdb4ee14ef6d3fc15661288cbe5de8b7ccb44af34ddaaaabe. 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/BRACT1000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2d6f705ffca523746d96d9aa8f2ca09ab475f6aa71c07c7c6857f309af09f5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BRACT1000238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316204d409529cd5e798196f76b0399f48d4baf65f034e0981b0609ef7241fdc. 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/BRACT1000239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78adb4cda521331cc91d169a456abb4f2624d13518afa7ab6a991be96ec1a10f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BRACT1000241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5897d1bb80edef6798798d94d07441b290418cc47d6c4be6f4ff7c58c1c2caf7. 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/BRACT1000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1aa6996d6ec161e1d9753bc584a9670640c82c2f13a4df1c4616585441f23e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRACT1000244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fc77a1458af3313940becaee3b72f3f6eed431280b2aa860c4ea29a38a1188. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BRACT1000245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b80bbf946d85d7c0cd41e9f51adeb70b9a92aea1364044eb596f538a488cc94. 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/BR6SL1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09067b72c2bd4235968e72b91dcc243eb8f5d589dfa8bb8ca2aca4b290629db. 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/BR6SL1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626e10089d4a01120ea8e010d8ca62bff4158e2ff567dd88da3cf6c05ef74bb8. 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/BR6SL1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c29854b71cdaa00e7518948ab52a1ea39e16483e71163dee1fdda9f3f9ee8. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BR6SL1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d92ebd0e18b3fbc3633b614f7445a217b76da457078a0678315eb4f5d5828. 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/BR6SL1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32902977ef610625116b2cdcf766889839f2271af7f65e5dbeb873734556290a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BR6SL1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17370969f411769879887e8294bec52f41dfee54cd148b398a60e8a8a4273790. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BR6SL1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc209fd7b671f06e370d3ec17d8dbf42a8430ac63c733b48decf758e538ba5. 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/BR6SL1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d8bea7109811086848b51f836874f06ee1a8bdb542ae938dd29e639eaac5d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BR6SL1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175855dc0cd6f493dfe5365455aa0c1ec116042f65261cc181a9dfd9ee8553f0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHZ62171989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681b00a2e45d49d20e10b3ba4c0f67373a9b56d479f376154e9fee553af0e2d0. 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/QZNJV2188787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c945c20a9f7d7eecfc26d140a56a39e6db43dd05e6a4f2028f1f5a8eb41cfa. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/BR6SL2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8f0914e71a4a46b30c6db444eda7f5d4b5a40240a4ba16c6b559c17510a46c. 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/BKEQ52400039.