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 0xa4355a6f73320e49895675b8ea1cbb176d2e08769195783a7d94747e81658583. 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/2159c2e6-6a94-467c-ac34-64433f750755.json and https://artists.proofprofile.net/proofs/artist/2159c2e6-6a94-467c-ac34-64433f750755.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lisa Frank 420 / Modern Computer (3d Blast LOL 420 Bootleg)
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 0xf7de5c3d9f8b977f3ae21a2eb0618a5d1906d5ca533516d5044068c4b600febc. 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/QZ8LD1719947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25722288a6e3bf70e6a81ef1a3bbb999f267b8316d1e7c8386b821309ea2d47. 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/QZNWR2096788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e4bae1cc121bbbdfa71803567b04a7da39fd112ccde0d792c4adad8c697c72. 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/QZNWR2096789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a275db52d599cc8c63ea69c11cef8b88aed261980b07fc973f47e44cfbc9e57. 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/QZNWR2096790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7f3ca4c7f00644d63b8ba53631367c8e63f6193fa392c1c464c3b1597f8fd5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNWR2096791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecfabf47d3c0c41bcc4c4d792e0dcbc9232a2149bee7e30c229f31894a42b82. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNWR2096792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f049df73b539b81a875608d8a39171d806d425529cc3380967907b76d71ccc. 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/QZNWR2096793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf75fc45fa6ad379880bac331da625a508e3f3dd0558b0deaf05c5da208a0159. 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/QZNWR2096794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7119f005d6747bf963323d487bf11d33d8bc9f4125bc8312a1e0c89d1b546d4f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZNWR2096795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b211833d94bcf70518fd7c5d588154735894011c496d56e7f72ca1b6d147ad. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZNWR2096796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1775cffd13d10636b3c974ebd20dca0d4b60a515b78da1987bad430f58731df7. 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/QZH6S1900593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8679427461773e1cbe317304f4135724ebe9bee3115d8800ce3e533696fb7847. 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/QZH6S1900607.