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 0x4c6ffa3940e31d7c4ca6fc5ff16c50ffac76558ffac2d29b6d41fd00f44c84e1. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca48bf7b-e2ab-483e-bb39-3854f80c9c0e.json and https://artists.proofprofile.net/proofs/artist/ca48bf7b-e2ab-483e-bb39-3854f80c9c0e.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 0x90a4dcde653bd6bf42303d0311df39ac666b223994ca15bb16141d0280e433b2. 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/BXC942000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a4dcde653bd6bf42303d0311df39ac666b223994ca15bb16141d0280e433b2. 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/BXC942000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83a1bfb049941aacc822963eaf08745e7fa8d303ba0a8e8f45a51c683298cdb. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/BXC942000002.
Fora do Comum / 60 Segundos / Rosa Versos e Vinhos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a334a541ef15949e467017dca29ac827b8296bbff64ef5f1ba47b3bfdc7f008. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BXC942000003.
As Lágrimas Vão Te Afogar / Quando Amanhecer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043438fee8447de0a973b78d31d23488922af0d54605d4f4ce08922ca5b466d2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXC942000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05d62d07bcebc8cf28db96fe404dbff2a1b0ed99a04a8e03dd19a94d69b0fc9. 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/BXC942000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa4595e0c16422f1de394b121121f3d4c8d10bbc7103cf76a39be0a0a3035ee. 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/BXC942000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb082fe75974bcb3ded90f75d25f5de223faafbb6e6151bc0b3a7cef3f80235. 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/BCF1Z2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33448a15a52a245cbd602a7881d32c1443676f4a727ceaf3dc01e69a0a7ed63b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/BCF1Z2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010e3d0ce2b5d2e691b1b5544de973d92f9cee75f9ca76bd3882fe8f31f55950. 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/DGA0P2399924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3916a4b9c03f6a3e4c98bef704182d328d67e4d818ecc853b9ee5193f3c61b. 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/BKTP72500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba691471323759559516b51754bdb2ab157cf814032e305c71945060c08995e. 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/BKTP72500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbe6847474b62bdf759d2bd6fde301c0e0cb8f4f697113aee042f1fb922ab4c. 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/BKTP72500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e624495c7f8202479bb3d0397f434104ba10f51568984d1468cf4a210741db. 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/BKTP72500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9df350d12710700effa56a7c71b85cf354e765f738b6b76ad3d9666db45b961. 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/BKTP72500008.
Medley Pagode - É Tarde Demais / Essa Tal Liberdade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ab2aead30420b0c575a9103cc6a907fadc50d674415838faea292a23ddf453. 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/BKTP72500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedacd96253578299d0a7fc10bde26497431227647cfcb8f9742eda79f2c26943. 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/BKTP72500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786f9b851914e833f1e3067deafda2a5c7b8839449ac8fe45fc798ff7dcb8278. 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/BKTP72500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54b026237e225d4425dcd8e1280d18c447fe3658be8107fbbf1a3dda0eb49aa. 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/BKTP72500013.
Página De Amigos / O Grande Amor Da Minha Vida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34916ba3be5e97724d5ee6694339ba1438555a0836826a6473167726578626b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BKTP72500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5967f29b75af981e1c41bd238a79ca22809e483ea4582f9b7f34c8796e9d6bac. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/BKTP72500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1436356cdd7de560f5dbe9e8deca9ef13c05ce83f82097e752abdf19417d097. 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/BKTP72500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3203d9dd37226130dbb762c1ca245b46c2388be637979a09a694950a8c417e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BKTP72500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef474ff81d5d9a3906587704e7471595983097de25b2285f48c2add353d01832. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BKTP72500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2644d0c5c2720cf9aaf32d43015b82d091e3e61334fdb711911405dfde34c507. 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/BKTP72400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9012366bac4c38673b2562def68dd98f17111ce07a765ca22518326f211fe9. 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/BKTP72400025.