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 0x41f63bd7f38afa2f6b1d6e35ca7e7837b8b81dcdf03561698ccb9f5e23c11f18. Chain 2 (Bitcoin): anchored in block 953681 (2026-06-14T19:31:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63b81873-32d4-431a-9dfc-cd936e55c69a.json and https://artists.proofprofile.net/proofs/artist/63b81873-32d4-431a-9dfc-cd936e55c69a.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 0x981e0ae44e4c98b95054c8138a766b0ebfbad9a26d4e08b8b6487481878a6e49. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKQ4A2302206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0824a2108f4efb26e7ee1a69bdbb2d4f063efc21d94f9d1e7319b3dbcd12ca2b. 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/DKQ4A2302201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd877afbbc656ff75e79355be7b7cfd668936c77b3bdad40a03b25a67b0c9fc74. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKQ4A2302204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff789e7305eca6089b873c14aafde099d680f269a955c9d93d061c324da927e0. 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/DKQ4A2302209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2a0ba1472247d7fa767dfa288ee301d8f16e19dbe8cd6da3e4982789c58a1e. 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/DKQ4A2302210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf310b4cf755d3fb1b7e20e8f33c73702f4c13e0c60061ce0fb6f89f847e8bf96. 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/DKQ4A1941701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d9d25aeaee5a67e41fe831d1e81732a59bfb72d285041924cdb347c3fd2b59. 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/DKQ4A1941704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baeb87b53e75b5a755ebff172f2b1284bb709367b7468db1d2f3ca8015be128. 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/DKQ4A2043901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abad12d35163dcdb88b207fa56f767a21ed30d4d5fbc40dda76e46b0734b4ba. 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/DKQ4A1941709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39aaca0c23b738518670c873c6c285479f7d93b0073c6ce263eee0d7837e259. 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/GBKLB0690021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd877afbbc656ff75e79355be7b7cfd668936c77b3bdad40a03b25a67b0c9fc74. 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/DKQ4A2302204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf72d193fe8ca8f09eb5b7523248177f433adf1e76062732021bc0ad4b3b6219. 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/DKQ4A1720902.
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