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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca99b7330857aab069fb7421ce9b54fe1847fe271ce5c451ebb226a49961191. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1154afd3-0053-44cb-8b5b-023894f7ca50.json and https://artists.proofprofile.net/proofs/artist/1154afd3-0053-44cb-8b5b-023894f7ca50.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93b22b12acb2e51bbb80a2865e5692621613885f5b3a94efd7b4a83f84c1286. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ42013063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a2ee64469b4048dd8d2eef34c12d66e492e240b6d284518f5d581c78fb427f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZFYZ2141322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149433685ba9e50b1816d64fc524cf0d67c7d42093e66d3d75fccb956333ee98. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZHN92215063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43048e35651dd9d2bad33af64a5b1235ae902c92c58896692e92f5d943e7fd6e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN42291185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258bd05970a2394c0f0a585181845efa2311d351b12993e29332744917ee70d1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN92215066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35e36963bdc6acad7a91b6f5400192e9320cad271f8c2c11354cdb8e21a4cf9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTAU2316156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666ceb1e91b98419ffabac5c762570da0588c154fd6966b6bcc82b3220f27d62. 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/QZTAU2316157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76194302e22f555a7409d118204468fcdd36fab42386bcd72860dec0ad2b41eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLR2203106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891e57b104a86a227948d6bcd6360d6e405763329510f2c73660614ce0c0cb42. 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/QZTAU2316159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917d78c64f61f54dd4e9a42edaac9e56dc742a903db9ca0e827ce352ab3fab98. 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/QZTAU2316161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05761f694e6a006d2622e12da0a2e3f5fcb00e4ef94c0fca56a33629ff848bc0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:07Z), 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/QZTAU2316158.
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 0x25faf86d2ded55d7ec8d6fd188f82117aa682bc69906a68c535192a9126355c8. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZTAU2316160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33669b3f83e98056f315d06820752e88dd9ed0a7bee63d2e9e54f5d83d684ee3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWX2408262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3f24bdab7c1ae1d3c6648c360a41bfaf8227bc66f39df890d96193bdbbd528. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:18Z), 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/QZTBF2515610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502e3ab1b5ccd61ccde7b85cbedcacc717401fb1a13cdbe76c24fac7aa3628b1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAZ2597821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33669b3f83e98056f315d06820752e88dd9ed0a7bee63d2e9e54f5d83d684ee3. 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/QZNWX2408262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277046a2e78dc12c55a388782d23eace4c0a554a3831d280494a671161d28cad. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:57Z), 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/QZTAW2539797.