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 0x9c493c898ddbe55ce9a2c3308f7d21578cb0806cb0dc72561dce21c4477c93e7. 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/b77d39a7-4d03-40d0-9370-22182f01af09.json and https://artists.proofprofile.net/proofs/artist/b77d39a7-4d03-40d0-9370-22182f01af09.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 0x5802709aa430558f043c3cb8e96afe03ce0d2061acff1531f81fb18660a52fb4. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/AEA0Q2159093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b016d5e1a8f9781bb2fac0fe0693b2c0a08eeac68a091819a5e7237903f238. 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/AEA0Q2194005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2768c2c0bcbf17c4fad55804c528171a2cc87ea25632c8622ce4311e596cef. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AEA0D2185154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36ae9c5c4e58a8ac75a686174cabeedd22f3a5e1e8d174fdcd617d9cd76aa61. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/RUA1H1850998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1dd3402f091d0dd7e57aa5c8cd753e2ba1e277a0fc4e71cdbb6e40c8faf55f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/AEA0Q2258242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338abb46866f8cd3afe467898ca7248c655102b6c2d52125f87ed83145b416ff. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/AEA0Q2258243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa59de33f604f0b7f475b52361c0332b680e1b824c4e661802919cb2b456af1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/AEA0Q2258244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03fbbd47ee73d1f63a6407b3a8a619a2e78f0c53ce0f8da41ee2518b65b5f0b. 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/QZNJW2355209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ecf320834351fc4504ea07d68cd5286b684b42b368dc948bc97aa2fc3ab64c. 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/QZW9K2348449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91243922c728f290cbda4305d10741a3714347a3355f12cab25b1bfc26d9596. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNJW2437139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7468f2e37c6208e98dda72d5db3c670952f95899bf1b9c02938ce58848cf166b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJW2437140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1902002efc7720e1b2d9a85b7f69fa5c63b2a1baef20d48c269de137dff1d1. 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/QZNJW2437141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26001de72609c97da64efe0f27ca153919feeb650c3e11671637cca20978f70. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/AEA2W2504605.
Matilha Vira - Lata (feat. Terrorscreen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36885331165b24412ad7a5bafc9c1e5bfaae35d009408a63acc02fe820fb6faa. 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/AEA2W2504607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527199fb07d9c24d55b7456fa4e3105ac51a92fd09884954ae848236b78a8de2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/AEA2W2504608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d8fed2e4e1cceed2869cbf0ced1402eacf23c262566c5735bf794cbf98bde5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AEA2W2504609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280acf66a42e0af87329a1c0c31824a8276956af8a258162ac25cdb7ddb8e6e6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA2W2504610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a03c23687edc0ddf1afa37140e075b7acda0e6b9547c399f398cfbf9da6083. 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/AEA2W2504611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e99d2fc8d3bf462c0fc6bcdbc03fbdd3b8c3a0fb4171d5cb03b7381d5efeed4. 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/DGA072478826.