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 0x53f14741dafb8c97f92968f86fbfcc6ed0d676cccf9d7caa5ab0081be1d0514e. 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/b9d58a8c-27a3-4bfc-844d-d0958bb1d0a8.json and https://artists.proofprofile.net/proofs/artist/b9d58a8c-27a3-4bfc-844d-d0958bb1d0a8.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 0xdc36d1cc6b8a1cde5db900b1925ab2fba76660247312b50afb1781bd2c71b17a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJW2416956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01830ae66f493c35e5c2fa36f7a9a1535baa7cb906aa3c88b3c06f19b053be81. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ESA112565780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2680a1d234f3614f3f9dcbe2a0d70eaa37aae11f99d9da07b3c9eb070cd85acc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ESA112564806.
Oi Rua (feat. MC Taz da FVP, Bruninho Astucia & Mc Saci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef3d8d6716647c8ba06ce23393a806ded1ab5d9a21f9fe7aa7b9165c47ac158. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ESA112558202.
Joga a Bunda Vai (feat. Juninho JS & Gordinho Bolado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d18381341dc4bc862311798179995d44ff285d66a4387e1bc2a485468dde70. 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/ESA112557955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85648b0625fcff500214d98554c455659ca51e9eb74c3082a472c5ab88f1f82a. 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/BCXK92400033.
Agacha e Senta (feat. Vitinho o Peste & Bruninho no Beat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0eea745710b2f927e1b9dc2c0b15ed314483ff71bd2f13bb39fed85b9c585b. 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/ESA112448698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2efde05dd5f9956b770534e76871c6fbab5d2cf646e7f527d888e8d95cdfb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA112444893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6957231bff6bddda1a328ee8adb6c4288f203f5d91248b381135672797e678. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ESA112444894.
Piranha do Golpe (feat. MC Saci, Arthurzinho Batedeira & eo Kawe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe9da0557528c5ef969598b9c58525f35963a1f3d24c1a566a0eb8baca163e3. 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/ESA112443143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f67680e1a88812ccdc586d4dbc5fc5037b0ef172c91ac8a92d5be71d30fd0c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2419353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6945577120106aabef297d6e83942c3421d3d184962db3950a0c2d17e45113a8. 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/BK2OA2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1515bf5a3a72deb55f6eddef3be4936d9e73f1d6db6af4362c21ddb7f4f8cdb2. 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/QZNJW2404003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a8ca6b6777ebb2fd0ee13162b1f8b3d13f5f4c41926f8bf3d53415bba38998. 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/QZNJW2402899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e2af9bf3f50f540cce243225f1380615361a26d7fb627d539f49b03588ca14. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMZ92426583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff77542a1af409bf946e3f6ee02304360bdb7599b30602616e6da7920c9d6a1. 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/QZGLS2430617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe54ae410415d60093d15ae037638311576036caa1ba0cea9ae6d7ec8dfe676a. 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/QZGLS2474419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189896b8ea6fd2a0b507f14c7ce1fac0334698c1d9ee6a22d1feb407088fa501. 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/QZW9K2416564.