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 0x56aa5893f5aa3011c7d275222082f98401b5758e905ee7c0ca9af3b4e332b744. 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/c634bb7f-5b59-4007-9b98-746eafd98d0c.json and https://artists.proofprofile.net/proofs/artist/c634bb7f-5b59-4007-9b98-746eafd98d0c.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 0x62c13b0e21a64797ae55709812ae79a97664a5af416d731c924bfb3a3d247043. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCA2A2300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5a23708c59346d7c31f968ba8b491489e96c36b12a8010da3799b494a2266a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BCA2A2300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896971c959eee6c21ec2a8cbee155aa61da3c5c878211592c4135a9e2a031fd. 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/BCA2A2300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97be8abf0f7273808445798bd5c726c2fdc7e8cc2815c0a632e2dd3d581338f. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BCA2A2300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b36f683d25ce03ff680bf133d23012be112a0a01b9df4d20203195e184af80. 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/BCA2A2300190.
Pique do Chefinho 006 / Isso Não É Brinquedo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9858a475beac05d638c3c09dd4febdc9ef46b82bfbeae2993552d1986a7e0a. 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/BCA2A2300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71714b7fc36648a955507d3d425aef8cf5018e9bc1f4ba67347e6238d572c26. 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/SGW502301277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f283d017dcc2a608abdd51ffe8dfce08815669821743eae4713b400de950773. 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/BCA2A2500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3d21cf154b60d3a54183a6c649090e695288257c62b7477b3621c72178a420. 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/BCA2A2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a27480b0fbe225e8ff9ee2f15141ead921cac2c0202e1a1963b8d02d6484004. 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/BCA2A2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb591773eb02cf4f5faae6a295ddeaa7d6c29c6d68bcb9720125f25d7fc618e. 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/BCA2A2100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f00283c806747f690618481a32fed12cafee495a5d0b2480b1acb82e59afb3. 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/BXVK62400010.