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 0x5e432f471f2516224727263f90fcb03c69897c1572d0f788f138fdca180d0425. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db550bfe-3eae-42b7-ba34-60a667d9b30a.json and https://artists.proofprofile.net/proofs/artist/db550bfe-3eae-42b7-ba34-60a667d9b30a.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 0x7a3d313b71936adb08dbec6663f87ae82058a97f82dbcbcfde8979885f9bdc1d. 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/CH7812411936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d24b3b1ac47efa25b9f9c7e2179b806f5999f3c6dc17f8528af703c935f0cfc. 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/DEZC62384002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e8c16c07e1642ff834b854b9dc26e2b2f3edf3047aaf605b8824f40f432a16. 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/CH7812238564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c39b54fc5b9e8dc03cb68d6c4b8f4ce9be37087c1016faaf4e84081de5a842. 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/CH7812238568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305ca221000a24b06c3c112985e9f00452ca44e81e572d791687a8116aa99136. 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/CH7812237660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa560cc3a419f08c8f8fff98800106ab5c581a96bb721a3e95c5d637fea1bde. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH7812238572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b38b956d0b4f361da62822d2a10ad172786dbd4c793d6e5a06245b195d38148. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:02:01Z), 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/CH7812238574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8e4031f3c549c7e3ae1ac781898b7073d48a131f1f4e96912036d78f074bdd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH7812356917.
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 0x2e2ddeadaf11e295e6446998ab6053c1e84683de4e7fd6e07c917601dc4f47bd. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEZC62383990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf180ce813b4c28afa74d4f692e85092388c3118f60d652bec2a7b6b57c0acf. 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/DEZC62383992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d5d8e91414f22746caf30a4f86f41de196883903f04488406717f108f4b5c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEZC62357128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30c72cc8bbccdb3fc90c9823bdc3db51ece81b74e1b846f436031585cb1b85. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CH7812237661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8113357feff682152b6d422a8db659b8d0cb807082129debcb12ee0e973958. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CH7812238565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2661dd43772cafe5cfc134f54209ef545933833863bbae3b4de6b21cf20fcb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CH7812238566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b61113dc4a6a522731da51728eca5cbc13e74cbea9cdaea108f858fbbbd09d2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CH7812238567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ed97c509f17806d43fc034168b3080dc43209f56ab0329ba185879dd2d3048. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CH7812238569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903c94bd9f8175801dab7941f9f91a8aea54758ae60682f7c0d930db074d101f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CH7812238570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39193230b10d2cf80675f7da6b08121b392bb77c53f62ff7ac2fb06ba1348fb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CH7812238571.