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 0x284622d285b13c0aae171ef3f34903a406b0b8a14f7e8691771cf106aeaf87dc. 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/caccd3f6-cb92-4bc8-9a0c-9c93725d3760.json and https://artists.proofprofile.net/proofs/artist/caccd3f6-cb92-4bc8-9a0c-9c93725d3760.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 0x7701a9aa8ebf41e6458370ee8656c920d7ee3450e73638e7d1b9e12cba4809cc. 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/BCRIZ2301015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ec671417042311b78a08d55531c0e7c229635df90ab9b71944f2e74f8b332. 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/BCRIZ2400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d66258bc132541d2daae8e061a66513c7a199489067c856acd3a187ee9b6a4. 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/BCRIZ2301608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ee2e3f89a6a57a79e00ab9888e3a0fb13eb307bd1a92a208e55fcb9f122f6a. 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/BCRIZ2301617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0465c4fb93eb7f8286cd86b063127b96524f1fc3c8d05e7fea9502cf7ed46f. 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/BCRIZ2301612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9b4697a1f9936b56a3f26924c175727bca2814e656106ed45d4965acb6017b. 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/BCRIZ2301614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57415b6eba5402fde0fa2cf405038a04d61dbb2e7a61a1183d4d159a2e5999cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCRIZ2300600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020c057844cc33cf098ce55bc426e7352453be4897f1fa235ae1553dd3954dc2. 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/BCRIZ2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ee004a6470882a50f73d9cd9889586d79a3cc1ace499acb06140b5e7eda54e. 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/BCRIZ2300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2ba5d2b82542fd46a7942db68b9a5cb26e943b604341104c600ae954c05f9a. 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/BCRIZ2300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cc026f718d00d1b862c98a773463929c66a1aa90e9bcff2e85c8bcbd8f30bf. 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/BCRIZ2300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b440a82aa6d8ef0d5726fb888e9391ac6a2a2ed120b9fce80ffadb40b7e2014. 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/BCRIZ2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f0d33627d67332ea5581fb0021d3241bb26ed39e94cb8e8c3662cece97fb94. 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/BCRIZ2300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65475587e5aa65dd015db2ad5602a856acbdca2e908842cc162c4920f3a23f00. 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/BCRIZ2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688469b1b27dfbe935d9b7ffa887be2cd546984730bd7241c0923fcfc16a86ae. 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/FR2X42383181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ef5de6e3802ca12d973a4e23589635e7dad6109edbcb090c9f34ae1bbf0d6. 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/BCRIZ2200227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87083e08fc2b7808093f17a59d4ad01dcde30fc9206fea2eaa213ade06158eeb. 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/BCRIZ2200229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74c760921c6c562fcaf13cf30f533dba115a687e6fbcf0746ecce972d05e1ac. 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/BCRIZ2400665.
Passinho Do Pedalinho (Aquecimento Do Verão)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f047c926b3b16e81141fda98762cd0e9fec125d627c26ad4f44512f8a85de. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCRIZ2301058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5afd6474121398fd927c3ea320b3d87cdcc7d26f08ff9773f7e91b9e2f0f54c. 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/BCRIZ2301071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9102b5ee07672ca760c3894c9d514b2b1929171210dc3d0fe16333f6f00900. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCRIZ2200643.