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 0x77d4a9410cfceb2ff81dc588f26713c164dcb31d25d21df21f4ea57778f91210. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5d9ccee-920b-446b-8e9a-91464bbbe069.json and https://artists.proofprofile.net/proofs/artist/f5d9ccee-920b-446b-8e9a-91464bbbe069.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Die Höhepunkte Der Welt-Uraufführung
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 0xe31aafcfc13f4e1876727986bb68d65fef836a85aec9059cd2b2644e93666146. 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/DEN129901415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26670a1da087b457e3ffc9c7dc53f40fb2f0ae71fa3c759c6afcde149ca8f724. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:02:49Z), 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/ATP131200805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b283a4e726188c6e0ac95d7c419f40d39e6bfa32e4dd84ac530690d2df72726. 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/ATP131200807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683fab06f7c25ec73c32fdf60f42158ce42341f7124733262df3e23fcae51886. 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/ATP131200809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21d0db53de0bc4cfcea4d0c901c1317060bd2e517456295f67142b82d349e5c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ATP131200801.
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 0x559e9317d9e9fd819a9c1c2e0ed94ced0566ef0e50d628c86f6ec71009595bec. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ATP131200802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51330dbc684b48e90d22a0c95f2f326d5bb06b690d30fd1dc3882d102dfaccff. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ATP131200803.
Theresienmesse: Quoniam tu solus sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c83dd0652039b6a214c1fa79ca9923c36dc1b4cf08239837e847945554b05f1. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ATP131200804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07e97a7b554b1f752be002b9822ab0ade494f11f65f8b6eab2afc961530e9b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ATP131200806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f07bd21d51bd966c3675c3d0a89a9586199b6ee755a7e0e9f2a7d3c889480b6. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ATP131200808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb15545ae0aae8aefc70a7ec6de7649ee3ddbdc9e7aa79330b63dc766b9909b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ATP131200810.