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 0x8323b723b6a27b4641e9656089eb1ae703427ad8c36e6f3fef8ee1156a6eccc8. 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/d62f1c2e-365d-4f4a-b372-006cfcd330aa.json and https://artists.proofprofile.net/proofs/artist/d62f1c2e-365d-4f4a-b372-006cfcd330aa.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 0x1202f246c9cdfc4c9fba40bc4e423e42775809af4b219c0d95507a95d04ac720. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITZJN1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a69a377f6c44c22191bc1b5577072348095d325983d7c0f4ab06821ba43455. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITZJN1900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed07157d5bb326538285e2bcf8703551d7ce4108e6b09a8075d2273b08abad. 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/ITZJN1900283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0fefc79355b4c3767af26fbc15c74fa23ffe30a6f4dfef678dfa5650527ded. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:52:31Z), 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/ITZJN1900365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce55f42e96398d2c6d9f91607c4f564b8536202e14486612ab5d725a6f8f07e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ITZJN1900367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bc2c43f1c00a7345de0fb4bbb590746410da6afa3bdde7e6c53ff2b4653af9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:35Z), 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/ITZJN2000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45887d2b66c67643f21ef130db148b96b3adf1b3fa35d583733143d1ce5742c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITZJN2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce8a24648361d4dd3105da2411eb800b54c8d3cfa075ed7751da8719ae721a8. 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/ITD542300692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe110d1e1e8ac152403d71280ca902c77277ff82cfa3a908cda72fd50b7948225. 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/FR85U2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3bfed021e3f8b591e4a4b969298a8524046f2051aae70c6cd14240013dfb09. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITYEB2200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2311d9bfd4c44359cc2bcf30a182213186c2cb68d72263b900acdf8d93cae47. 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/ITZJN1900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fe9e345f5ccf0355168729be2b83892be2a4a7679cf913041eafe18120a419. 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/ITZJN1900282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570fc97c8ea2bf79d7e7a9593b2ee95297d0079ecd9f9a635a6f7dab0f71dd70. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU2340253.
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 0x11907bf0d4cd953722ef9d8ba60991a520678cfa2de40aef336b3cc905a466df. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBKQU2329708.