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 0x7df5fecb6d213fa68fb2f93fff4fc52501df9ef2919209db62a125e04f38b577. 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/2c229134-b24d-46a2-b420-e43c2a015af2.json and https://artists.proofprofile.net/proofs/artist/2c229134-b24d-46a2-b420-e43c2a015af2.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 0x28fc52dca161b663d42565129119873ff26404a31f6980d2b04028a794eeb0e8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNB2292836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4915370c22f235f63ba4d26d1993cacd1e98258939d4349725e79a3cb42971. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWS2245592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358b36951befa4bebc2ca3183d11af35db283709ffd243da735311b5024bac47. 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/QZNWW2280427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4aeb3eee3c63122253c137d6899af171f90e2d2de9f5989db9f1675af23e54. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWZ2234773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d2041febcb96623a87442cac6df1606678354dc79d317d0b8d39318adeea7. 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/QZTAY2234275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5c054f2923897a4448f24c53c960437296072d3f7b94ac9ebcb25ae901b909. 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/QZTBF2316920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a39a832c4c278d8359ce6087e7bb84db72ceaeec9014937345efbe8ce05594f. 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/QZDA52402248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb136bcd15ad67e1aa04a0176da49388c5d9b5b43c4cf676a29708caf365d1239. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6N2469677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d90b9d3fd0f13005cacd33d2778f9a660a71210683a59d978f9a05be697eb9. 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/QZK6J2448426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504f998063c91b19360d431be3b4d99e2fd2516bfb42e2a8c5b6e2d36154bdbc. 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/QZK6J2448427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab63662ec36a383a4363bb9d4a29c65ac8e5b2d77e191d78e637a38536c6133d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZK6J2448430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf7beafb504c6f3f7e86bd45ea4e306328d7624a950530b749ee85f3cf69f19. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7P2472897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d22b7ca8a16355bec8416d7bd2f89d788ea03faeda04ec7b7e2ad9ce97026e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52568604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc934d55f1bd2a1b9e45558138488233b6ca964dd992282de2cf5fa8698575010. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ772517048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0445c33d294896d552bbc6fb406dc1865ef29d9294d1b740ba37fd45790bc77e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7M2563961.
QuERia sEr cOMo CRisTiAnGhOsT pErO mE tOCo sER KiD PiNgO
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8401241d2e963cc56e110bb9e26da1d2f14a90f0a33361f200b9554bd351863. 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/SE6TI2372694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d94e33ff76d68885560991fd08f94136d360f092b9ec8551f0a5e33c0934ba. 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/SE6SA2495541.