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 0x0c0e36f182edc0eb7f68803d37d81315fb95114ccebae35e69ee6b41c46d04c2. 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/c431a4e1-417b-4f38-a35c-92e6093dc3d6.json and https://artists.proofprofile.net/proofs/artist/c431a4e1-417b-4f38-a35c-92e6093dc3d6.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 0xd45f7dfd74b868cf4a018369106b08127e26b2f30936fdbef2ce4429eb195c99. 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/QZWFL2383619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24729f36cdd6f97c753e32c3dc092c526bb47e1cf7ed15748d77d24cabbc91aa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFL2383631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd00ca09b3f9763f3bcdfd967354ff3f2ced3fe4b2f8f4458f1aeb97660b33c. 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/QZMEQ2425047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2e0edc4d55f8330408f20145ccbbfbd22b36d5cc3b74f1f34e2ed8f5788583. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWU2446935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bcf04a401da49812ac1fdca97c6ced9de8f47f5082f7098764c5f75dce081c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZWFN2499434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ad953a6fb263162d5c10207f1018a3b64cff59442220051551fff486f2d96. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:39Z), 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/QZWFV2415542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7a28dbd93afb7aec363479e2056f3acc1ed515980f1f00fba844ff39c7bcec. 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/QT3EX2423104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e0dd6af3afffd711b6d5fbfde9159f547707db9bf24331b3311202a2627860. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:48:24Z), 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/QZFZ62511741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016dc3130b35ceb6cfbb8c2bb78dad1e18084870577dbcb58a50962d06dccaeb. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZES62580924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf155cee7fedb020f914ff8278b7d734c62f626085a69c7b1e20eb52b6f14085. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:40:53Z), 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/QZHN32588985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dca90d3c8b078a91182c619494acf927d6f84164f1a0513c25c5ada672c5fed. 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/QZFYX2474947.