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 0xfd0dfedb0e8b2dd4f000be23ee775047ff488b2014cfb3e3dff16a111194b80d. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f3d7c13-4514-457a-8342-b1f2bfdeca06.json and https://artists.proofprofile.net/proofs/artist/3f3d7c13-4514-457a-8342-b1f2bfdeca06.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 0xfd7b0215886aea1d25fdddadadca5cffce2d81932959c8842e171e384982823c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPU2228761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c42b2d85064a481dc341f62f70bd653e667d24bb531a12a7f113597909debeb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPW2311424.
Bayside Story 3:00AM - 2023 Alternate Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eff0099ac02664caf8e953202f93892362b1d7a580d9096764f2c5d25d7ebb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPW2311426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c253f4dcb276ebefe611b5e37e97dccaab5967f31647b611f31caa77c26e09f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPW2311427.
Something Like Romance - 2023 Alternate Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe962d0d622a2840e37fab8e8ead6bd92d67146ad265f5c895296c96ab3e67. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/TCJPW2311429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26a3e858f4de0f3eb56a1d0b4d07b90f54435d2d8555fa5b09c00be5128d44a. 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/TCJPW2311430.
Something Like Romance - 4 on the floor mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754729b767318e70838ac9dcd98178c8f7856ade8489c21ebd1192a2be8a5b7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCJPW2311432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac26e53725bc84885a3683fa5aa9dfbb9885dea273fd09f11d326c1a6059d012. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPW2311434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442baedf8dc08468d2efe76d40fe10f757b7d63430cb02a580b6d0ea45430417. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCJPW2336506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe8292483c9bcb3e7f2423632e601078e83dd516e4672777891d53dfa69aa3d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCJPY2354045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108720b88a4ae6157c5b2ae3b75dd58810ff7ba364bb64358b6809846291b415. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/TCJPC2428269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a99de84735b295594ae5fe8c3b3af631d3ff8dea4af0e36394e4ad02c982d3e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCJPF2531986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459b49251ffb439b643c2f01e6ee79a77272a67c0f038e55dc0b8be733bcfc5a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPH2513843.