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 0x2688d9d3a1012ef04d852130ac4a6edf0c2ef49b159c357e2455d956ba733acf. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d0eddf2-3ead-4950-83e4-ebb3d97876ad.json and https://artists.proofprofile.net/proofs/artist/3d0eddf2-3ead-4950-83e4-ebb3d97876ad.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 0x8ba7cdea2ee6f756cc70b0e0541836c9e4f4b114d5573740d0a2a514b6a65d32. 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/CH6541810494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd286c11f46d1d59ec29eb8e1ebc2456929c339005bb5b37a451e6f7fd3cd3e80. 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/CH6541810495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb944927651b8d898f6ddc5ece6e85557a29142d30aa0201d9b9ccb61b262e754. 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/ITO172240648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3d2383403873a80fd9f0be5555cc16249c1193819cad36cf54adfc4ae35285. 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/CH6541765875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea9d32e58c4bf76169673d153b76b4911ac7c565bef03413fcbce7af211c66c. 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/CH6542098613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a99feb74f42d51b4a6337c708d4e822136cb79ad0f717f6d040b40b9253417d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITO171840015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98954ab18809413c27cd7b575f8d15a0134b439fa4dfb8dfc5ca5d80aa5bf141. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH6541830747.
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 0x588ec9693861821ff21f94d56397174aade06f4ed0ca4567bee51916d9d2557f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITO172240647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1daf58d3dc4eb5e62ad6d559f85250eac05c38cf187331529df0f130f07ad8. 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/CH6451507239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095aea164c16e7c977c21f91a9331175eeb34f800e7f9eb18974c786988ac7ac. 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/ITO171540016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e657c72eff2b7776ce60a87f93cabba5925a1cd37c67a784679c120bc6eca. 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/CH6541880485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad942af30794a55de7978523efe6b7e4366945083278167a2f02ffd747e9846a. 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/CH6541982865.
Walking on Hoarfrost (Spiritual Soul Radio Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b23dad7442fa6594d548b05bee04ff3053ab5c544241e088501aec28c6f10. 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/CH6541982851.
Feeling Good (Spiritual Soul Radio Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671d46d3d2b14d1149dd5bd0f2c7ceb415edd4d6145e8f34a7664f631616fdd8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CH6541982881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fcd1569be7fab640fde012e8f4f73bbf145dd82cf5e95b43420868e3b0acc4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6541810507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75258a6ec7a90fdebc2e08dd5f25cd1b551cf320e4c4f05fb1ff33d4f557f37. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6541753971.
Old Street (Enea DJ & DJ Lukas Wolf Deep Instrumental Radio Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3a40ea825a5f525a0ec59034c19d3455c384672b88449bb672268224ac5411. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH6541753957.