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 0x5f5770bff2241022b2f9522d6baf1e78d3f656343ea56b661f5191aa25eee4fa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6da569de-4f78-4e45-84b8-f7a2a88f154f.json and https://artists.proofprofile.net/proofs/artist/6da569de-4f78-4e45-84b8-f7a2a88f154f.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 0xdd1ba8c5925c316865610084367c458754f6d98bdf64bcdb8aed5f72d0fc0a47. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:45:26Z), 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/US43C1300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f10cb6294485d1f297704b2b9fd4eb66fcc18e4413e670495c39065f63066. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US43C1300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc0351740f15d2268386fcbb9716092f413d28f2a9a3eb9d7b5361301141f2d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US43C1300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38170a9ed72f635ba92cddf386f6a8746ca8c3184beb02aa5c7960280c3f6adb. 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/US43C1500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097604a074f9184e112647f167d74617ee4d94e59b9dc8f16683a9697bfd32b0. 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/US43C1500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef4fa77b477d42d01e050069fcd70c66a660a679c7fdfa2d1ee6ebd0785b30c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/US43C1500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ebd151ba0b65891bd6cb3959bbc3acb9e116dbc5f66534938df05e6a5a6ca. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US43C1500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6b1f8342c80c850f37ed08ef131736506a9f2470eb0c676bd22471219e507a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US43C1604403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc378fd9580ee103ddca21a3ea3e97e4025d11433fc52a0349513d5726bf2bb2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:18:40Z), 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/US43C1617467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff396cd421d9ccf1c9668b7d0638855199165bd878e48174fd1752ff62cdff1c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US43C1620398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4e971090d7915207f66c8fbab1de626d2ff2fd7c26116ba5726cd0739fbe43. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US43C1621061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52464a829f11a9a546cf6e80c286798b9e42cf6da0c7d51ea74362518846db53. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/US43C1630025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f21f74b7fdf0efb82a291ee8d1e91d931fdd000ac03af92e34c69cc25464bde. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:40Z), 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/US43C1630031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e3fb93e1c569a9f6d6bcf658aea7dea81a57c31ebecb9afb25cff8f5b1564e. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/US43C1630035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ef2702d2c7df4c8395b0999b3da5404d377bffe902e24e4fe16bdbd6bc7e59. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US43C1631709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f58cffe913b1519a3ab0835e0e0294570d7c81fe8666fba25b26cb569453a1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:03:05Z), 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/US43C1631713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e43742fc47cac08b09ca4ee05f24471eb54584d5d7624842e9307362c7a237c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/US43C1631712.