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 0x87ca89280343bc1144540804bb9e332ea4bef122962a68073d9d8db68691d38c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb16a012-b0e1-4fe4-930f-fe03cdd9010a.json and https://artists.proofprofile.net/proofs/artist/cb16a012-b0e1-4fe4-930f-fe03cdd9010a.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 0x859fa5790f9a31ce6b52a275065c54fb2508df28783fddeb0c47d3c476290609. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAGQ2204124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f18bef5fd7347d5681c6791d0fbb6bb63275902368ee65a3194220e88843169. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAGQ2204126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ade81931418690313e35b8961a869c552589d1e81cf285f658e84708565b2bc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZTBA2260088.
The Colder the Night (Instrumental Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443587ccb63c5d9ebf9bd8be797b9d8dffc930e7efab74441df101fc3b3a923d. 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/TCAGQ2257470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bfde59b063ff88d5f31d1a24cf193a93da324f5c3941ad244c165dd35a1c7f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAGQ2257472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00bf40df7a69abe297f5f075b4996eaba12ce76a5b42e86861d25f7ce39f31f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAGQ2257475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409dbd12edf13989d28d29a3a2f2861dd664eed731d925cf8f4aaeabf46092d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGQ2257476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b75e3fc8ebd0b10b62cf2aff62583d824b2e7bccdc9f7367575c4ef1fc7dac0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAGQ2257477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9a3b68f5b6c6334a891da41c7bb4680c263c6b56a66b6ef83014e58ab198b4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAGQ2257481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9893bac5c2670b550701cc938ac137ff2810743be3452183cefd889ac811cce. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGQ2275054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6e3ea092e2babfbbb5cf795f42186563895378809d600149b8eac2c0560549. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGQ2275063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16294ef0b70ab8dd42990e69efb9fff0fd00402ffd092de06bdfab074620c9e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCAGQ2275066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4d72fc99cbd9a3743730bd6cabeec8674331eb1dc521887adb779e4adca288. 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/TCAGQ2275071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b1476f3450ee820e43da28bf032c9b7d29c1afc8d7d68c27c3e366c78944d7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:36Z), 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/TCAGQ2275075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733e0be0b7018ea5c4290667e238424e61f7174513afb6f991d3d47b53707828. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJD2457515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c1005032ad6d31bfaf31b72ddd89cf685ea26313615466769e6117579dafb3. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJD2457519.