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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 0xe605d57721a46b0baff484ca74cc23035ed6c3c072b2d17c6807c84a74d115d7. 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/7194eef9-3f96-497d-af57-d9d64cc2bdd7.json and https://artists.proofprofile.net/proofs/artist/7194eef9-3f96-497d-af57-d9d64cc2bdd7.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 0x4696dde96f30cf0239306c94eab0070be9b7bf31145b986afc19480146945315. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA2Z0400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b2472f7d2ba6f1ed243238752929fe9f48174d0d87ddd20b47db07b23e1414. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USA2Z0400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac93805fd2550c8bbd318e62c01b7c410133a7e46fe5e54ace26d6c48cc8e3e6. 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/USA2Z0400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe324e666b375f2023eccf8568a45b3539baee2db9b0cba3b5502b30c4e3c5d2c. 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/USA2Z0400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98114003391d2ef514c26adea0922498f1b26382f5b982c90368e9e78aee08ba. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USA2Z0400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86bfd5053c9958d3d5f338498c25df5d1c0c78672e44146761d001fa4fb2d33. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2Z0400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be1203fd985ce2dc8d20b558bcfb1443d4c3aaf2f0eda90fdc31773ec656273. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USA2Z0400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325758eb3c258aac500fc987ecfcda7a40fd6ed2f92f45011efe0d206742266. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USA2Z0400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44413771fda4ebb9d281691ce0a05a9bc8101ce59a7d33776b2109f73ab56255. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/USA2Z0400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7699ae1def4840cd79359e34ddbeb8332b7e546daf2fefb7fabc63d12a9bc762. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USA2Z0400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18e3e3962681e8ceb7a1e51ee5be49dd45f5c2d7c6790a836e007cf16554fb5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2Z0400206.
Here Come the Cops (2024 Re-mastered version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684c40923604f1ed0141b747042ae2e0396ec3eb70e94c58ce18a137c89717ed. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US2B20401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244b9a71995fa0ffbf64e2a800281df80985d30101ebbb54050d0c537fd800d5. 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/US9HX1000296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519109d20b6eddd8df34dc0a260bd4ab587289ac95291b2052dbc983b2082b5a. 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/DELJ81945364.