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 0x0c600b446005ad684ca6e825075c14aa0e655402ef252c32737c25e9de6b4ad7. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf7808f6-36c2-4627-bb88-080641d0c281.json and https://artists.proofprofile.net/proofs/artist/bf7808f6-36c2-4627-bb88-080641d0c281.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 0x8ebe97eaef6f44ffa3b704fe83e40117ac580d65956f0d4e8560adf247aa775d. 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/FRS182078199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae89866eeb2311d117acb012807ca3872fdb3b23c1d7cc11b945310fd5ed5d5. 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/QZ5F42300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e526f2925ab8309f8ddbfdc106315d02209fc4e7336763400e657b2212e5d8. 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/QZ5F42300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33257a12566b3563cab8280457d3accd3b2ebc3564e9194c4bd6afcf12036e4d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZ5F42300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41daa038e0fe6ae2d80eb3c36bfc22a9ba825bfc74659f40e921a144feed0b33. 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/QZ5F42300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bb4980bb328354582bf293c5a8a5388b4ebe9b2fe027a8d72d0b7308a6917b. 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/QZ5F42300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2bfa5410a0794e2f8c7e6d1a8bba4f9366b046ae9685d8889d683d78875f23. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZ5F42300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9f292364887a2423cedaa27852ea2068b5222f2bf23fa2d3c9c170b60aac7b. 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/QZ5F42300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2ca6344f4c014bf3c1fb3793e7164854623441ff2d6905a740742d1c15014. 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/QZ5F42300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8193bfd938f9184827ffd344e5198c3db8edcc592108cacfda502115e793e2b9. 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/QZ5F42300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689ede6b05c250b168a87ca76dde33c1713be17cb13866e0ab632720f9a254f3. 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/QZ5F42300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3890004ed5afceb706a9bfefa94bda0ff2c5d8f2ec70afbe8dccfaac71b0f706. 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/QZ5F42300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980ee62839622b121d4bf94d205372b55379a9c88ad74878f34b43e5fd14cd0. 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/QZ5F42300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6dee5565a46b4ab3b6a750b4942430f1f9b263c80880488b48cdcd1b8bc1d9. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/TCAEB1900663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c5e9d4ef5aa474497cb9bcac2d736a8c351bd1349060e3fb748f06b276b0e1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAEB1900666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a80f923b67c49c1ef3ecbf601c8e51efc181e9ded1b3b7b8373234927fbdd6. 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/TCAEB1900672.