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 0x7b1e31591aadbcda19881fbca9e94385bb4578b9727aa5d561eebf941e0b2614. 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/55585d8b-dfb5-4385-971e-3d20a6380cff.json and https://artists.proofprofile.net/proofs/artist/55585d8b-dfb5-4385-971e-3d20a6380cff.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 0x9b5c822933b03310057dbb7463eb3e161d998598c1c69a3562a0f4d32306f2ad. 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/QM24S2403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8174c6741245df33497685eec6ee9613b8710025eb215d2c1535c24c27624518. 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/QM24S2403378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347a862c88af010f1e9148f35f00ca5fdc42509384a15b143a79cdbd8d1ff639. 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/QM24S2403377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0b7c96a93c92236b6d15496d90767b3ae7801276c3990724c5fa783e8cc6cf. 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/QM24S2403376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40adad0de07a5f71a5d8ddf31615b8a5d4f52ec3941a1466e6e8dcd6820d4fe6. 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/QM24S2403375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9943de5ffc2c24a713f05de4657453d4e08dbcfb5155e1a2e21157b22fffeca. 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/QM24S2403374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb1967dccf8563227781c8d87c3df408bf4b887b562bb13377ace31bebd0944. 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/QM4TW2481322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c20098302567d5abd774302da99279d5470f3de3d72f884b04c6ec3d56ae4b. 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/QM4TW2459647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68145333805bc639be696aba1b0b7d5e0328854f89346738795cbe3be76d4865. 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/QM4TW2421492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c20098302567d5abd774302da99279d5470f3de3d72f884b04c6ec3d56ae4b. 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/QM4TW2459647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68145333805bc639be696aba1b0b7d5e0328854f89346738795cbe3be76d4865. 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/QM4TW2421492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68145333805bc639be696aba1b0b7d5e0328854f89346738795cbe3be76d4865. 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/QM4TW2421492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2f403a499849e85b67fd7e20ae5c105e1e6ae4ec974afdd8afcdd331d33a73. 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/QM24S2306508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a21076b12c0772055dbac08ed5af8285210fc71b0fc075edd7dfee62b926ad. 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/QM24S2205165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9f85d643e17a716e8747f8c4dbd6cc45bfe98ef3bde75565f859741051f990. 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/QZHN82224733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1ce6b38ffefe86ff90eaf767f230d3e76173caf00d55e5300235abd7536a1b. 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/QZTAS2137989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1569bc777cf8609220c994ced2afb6aea7e87d96fd86aa68e7e1916b10654bbb. 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/QZTAS2145561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22539491504f76820f0e87c88209acbce0b866fefb39ac463ff878cb28f8f65. 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/QZTAS2145562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e45069ea12765ac264392c718d636ab009895cc6e599e3210f3142535c285. 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/QZTAS2145563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb13a7bebeca14111c52d53419d6d9956ddbdd9c1d66be081a3012f14478bcf7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAS2145564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35d7a9e177bcd59cb07c4527c410a8384ffd72394f359acd55eacd07bd10e0e. 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/QZTAS2145565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae75a526da9ad73a499e9dfedfa5352337aede132fa1b42cda28e888c7da97d. 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/TCAEZ2079800.