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 0x79dd5d08056ee6b593d2029d8e2d7631a5f0ef2db7cc8fe95225374904b86896. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0022603f-0236-461f-a1ff-4bd7184796a5.json and https://artists.proofprofile.net/proofs/artist/0022603f-0236-461f-a1ff-4bd7184796a5.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 0x753b713f1f080c755a080efbf091bcd5283b166deec57d778e8a402740ac58b6. 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/JPJ831703608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b33c5147093875284be358c1a0120688a4b0630121e266d341393b5612af1. 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/JPJ831305301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bea0ec093ba3dcc8610d9f286bea8db2323f769ad9d8cab46cfcfbf70cbe481. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPJ831705305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e5e3ec1fc20b8c055774542ab0a936c8ab1790db36ca158ef107229a97b1c. 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/JPJ831704007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05ba3a25a9de334165e5da2cf8296a09a0aa53010d6e0f3ecfef86cd44ddb58. 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/JPJ831702805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7282eaf97e066635de6c894f5bdec4f2925594761c29d0f89f5a776736dac3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:04Z), 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/JPJ831702810.
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 0x795ec6159398f12ca6496d9dc349905a7f059b899de91f820d1eafce52f63f97. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/JPJ831702806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0be46af7596e958bccc59f77d2ab0f1f881e36a9af3d146eb74b5e17454cc8e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPJ831704502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7481277f5480533ee473ff7b7708e6a7a6ee4ebe0659414530c97f760f78a970. 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/JPJ831704503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7273f28635620bb5b2853cbbfb16d18291b26b00e933220bdb6b4c49ea1ff8e7. 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/JPJ831704504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00febbccb0fd05f44cea082a0178c78f08bb1ce3f3bb9fb4a1b93bf1851c6c34. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPJ831704507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af47b27c6e0cdf6148831afbe7806174286f66fe599e77085b014d78a81a420. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:57:08Z), 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/JPJ831704505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf57f4734d4237cedc229cc4ce939cb39ef00c18de26bec3ed1f667e802cc22. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPJ831702102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914b660bd0d09f7abb6a507b6d92634f500f3040645d98d9891ff5b88c617e20. 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/JPJ831702103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21779a2c32af693a2e783071125bcf49ef2f4d5395ff271c8cc33d7c76c8ac1b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPJ831702104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a3d67594611fee1ae9051068887d37d26e60aa10bc6881ac3a497d1edb3745. 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/JPJ831702106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131f42261aea3a3e64205674ba73a4ef838e0dddc5ce93ddcd13bd2f0355078d. 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/JPJ831702108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f8b5e6ef7830573279ad305aa9cff4097bc8f3a5434489e03ef15fe6be2090. 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/JPJ831702111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1edbf016fcbb0b403b4eaedb980dca25317f945c775632305fb6a4031c5b037. 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/JPJ831702101.