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 0x46194996c16699460289526de0b7598252f392e907bdf49fe8b75fafd433e64f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5a75808-9a20-4669-b33e-7c35fd90e16a.json and https://artists.proofprofile.net/proofs/artist/f5a75808-9a20-4669-b33e-7c35fd90e16a.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 0x8486aa8912c3d2b54ffd6bed76a682683a3c450a456a7d0025471bba6e8a16db. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAFF2041140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84e1e46b784e6df9cbcd8ca98ec2ef6ddb74be1e4503f942d7fbe5db55d33a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42125102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc181619a31b3e93cf8ec025e06dba05543ae0714f6b53b92f11e32a4d0d56a25. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:55:36Z), 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/QM7282470681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2802051b8bcb3622c88172977327245ead6168eff00c88312f447f068aecb19f. 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/QMFME2139583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff299dd3ec801267ac9c2db65949155bb6e04ded308823e573f93f5684b35b77. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFG2025760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e1c122c0269e101b03aac49028e227d7dab501bbc69ae5d1b72e9be27e7915. 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/NL3BN2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e1c122c0269e101b03aac49028e227d7dab501bbc69ae5d1b72e9be27e7915. 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/NL3BN2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3920d3c659907a5a09e95005cc15bf2261e2747d3cbae216588ae5542c6ffcf0. 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/NLG662100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d78fd21937930bdc12b72a7275047a9c6055b10a6ae42ed4208d6b146d6d81. 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/NL7EV2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe1ff7f2d185aa28c632a45031c4ba3bf0f9bfd7c1da1bafbe14e330ebe6ade. 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/NL7EV2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cc927164618624c31f2da7029abb3fb8568b57193affabb5a641a3c83c3dcc. 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/NL7EV2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeadf1e41d26b35a1e6dd8b6e17179ec6f87e664e434680230c13d892e0a2199. 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/NL7EV2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb356fbf5c19a3a6e14d9bdd90d4634d78c786c15ddbc0da74ad54ad673408380. 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/NLD322300200.