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 0xa8707ca1d673fe2f87defc7f926c4423888699e661651a32759d0e978e2c88a4. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44d12faa-3690-4b27-8738-4b9c025a949a.json and https://artists.proofprofile.net/proofs/artist/44d12faa-3690-4b27-8738-4b9c025a949a.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 0xd60ae1c7bdc2284ba04c8ebf0e400239d1724f00f8a57e434e2fbb44f94505a4. 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/BRPUI2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607d8cfed84a495b1da3c9e615a801fe80430ae19f061ed4aa2d92fed41853bd. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRPUI2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa538d8ae7a930b4bcaac34c4a8a1f33a704d486d666110306ea8d0a62037fe2e. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BRPUI2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db3aa84f0112a171dab1a80b835ef97ced2f992a62718fa0f5bd9e78c799970. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BRPUI2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec532d3893ef46fe9355b4f53c0d22197aaf658c1fe94f36eaaed7f95ff0daf6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRPUI2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747c5db4a4ff4de7bd6c9ac40302e401e240329b8f9bf8d6fd11f506ee575986. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BRPUI2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718e10202d6e6e6982c3876c8c8cfbea064be362fd1f29d6d9a0e12cdd9eacb8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BRPUI2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539062a4c7b1c2ea8c9ef6496a30e414254692a1e37fa70d75345141c2d5e06a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/BRPUI2000109.
Choro Negro - Cristovão Bastos e Mauro Senise Tocam Paulinho da Viola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab9e1457821eee963f01e6932fe89569b3aef7d3facce12ce2c534836ecb85b. 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/BRPUI2400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc740cd7355c3e2053bce1b328162ac679f878339ee354353951d5d67bc31075. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/BRPUI2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3631bce5c3334835848bee4e8ba014f0d31bd0d03fdba6b030f3272020ba0e4a. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/BRPUI2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b6f718ae269cfce4aa015e0e738bb119269b3a0f57a397edc190b948a2f004. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BRMUD1200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82eb8106e103affb14d96c0f3e5ed506168e2d020ed71b2ce8bd799b68443a2a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BRPUI2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d9309c670747745d9287f4b4a41194b0281df631b22c3dfd4bc109508e4745. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRBMG0100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175126dc34cd1f0cadf2cddcc50a24f24924791edf8ef97820f9462fa7265807. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRBMG0100224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeca403357c815da9ed3fdd19761a3d30b4df91fa9025c360d59044e93fea37. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BRFIN1600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dbc4e5d02b3e8741b4c79619ac4f08e0074ab2791e9a6d74978254aad15921. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRFIN1600069.