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 0x3869ea60ee314902e855ad1b59958a71155a3a03a525a8bbdf08682131e14dfd. 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/3c9df23e-9228-492e-9492-895dd3a032bf.json and https://artists.proofprofile.net/proofs/artist/3c9df23e-9228-492e-9492-895dd3a032bf.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 0xc4d6b833ce699601bf0512d6246041e2cec9c3082608d0b9cf346f49d7d5c8d0. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZNJY2240749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9534440016f919b263dbc4d384f8445b7cb08173ac4908a80c90023e2a6e42b1. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZNJY2267040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00581a04b0640038530d5d08640362a53d9bcfcd23860b33740c978068813a1f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:10:11Z), 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/QZW9K2252272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89dbbe81bd85190bcc3a1438cd42a787c7cda8957e9e47e72b4fb9b43ed9a63. 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/QZW9L2292079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129937adea3564aa41104737948a329c9f6f4627dfa69673f82d1878e8aa42a1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZW9M2220407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94771c40e5b82bb79d988112de4c7646747681a3a85a3cc2a9eab8ef75dfb691. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZW9M2220411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c1cacc873cab35e49cd125ce49084d83dad4496aba7c15dd3d4cd7d5958599. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:35Z), 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/QZW9M2243886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4472d6ae79db6a5d505e871f33cce94c70fabc700fc0ef42931f510b09da15. 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/QZW9M2245415.
Requebra Requebra Vem Requebra Requebra Vai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4efa3c28f1d723b6b3c50aa22f093dbcfb9e3da305ab623a9efbc2a8f497b2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZW9N2248396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75ada210c1cb7b80f3c4f04144fb9744da70c8c92a6c68bce6de4dd525652e2. 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/QZ5AB2310155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471baa0ec638f35cfc4d5ca136e031c4e52939637a5fbb65a10b3a4cd13c15c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2323074.
Zona de Perigo / Facilita Ai / Lá Ele / Dance Dance / Eu Gosto Assim / Sai da Minha Vida / Pactos / Leão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f2f16055652d82916d3c1ddc72e8a644cccd3aa191906321f231a74e82a49. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZGLM2303517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dae67bfebee19c53484a474ada73ba1dad353671a69aeb482f16611cc76c43. 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/QZGLM2519175.