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 0xb6d7c2b76e7be7fa7c7a64285fa04134a4214b3e4957f074649293eeaf5079c4. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c32f348-75ae-4adf-8087-17dfe642317d.json and https://artists.proofprofile.net/proofs/artist/3c32f348-75ae-4adf-8087-17dfe642317d.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 0x12306142d27c5d25020d3cc903f07879761b70cb6ef62357a6ec7ba1c5cb9519. 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/NOGHH0170030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aff5efd955eb8e1e94ad138af510daa1678c06eb5094cadca8ead4abac00b65. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NOGHH0170430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e345366453f86ca84061e2a273e8b2d122c77ed7a9d9e55648d32e868af086. 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/NOHCM2302050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ebd3b734a2a8dd53437364a660c7ad81fd293d23b416d855965dc67fd9f73e. 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/NOHCM2302130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b25cbba80bf600bc8a2ad3e66866f2f4ecb30219edce78eb4737f2f89cd3bc0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOHCM2302150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd880f1c9498874395cdb284331cd8de1c11be5d786b2b4119d298af26dcfd10f. 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/NOHCM2302010.
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 0x4bb41fa43b676b00ad45158d274052ed530dc731c584f2859c626f84bceb8eea. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOHCM2302030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad76ddca517d9a96456a8d2241716ba0a8a41e7e44ffcadf13776862bcbfabf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NOHCM2302140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1c9c1827c6f487c5fd059920b63cd786269dc638261b78f76557ee82c70318. 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/NOHCM1101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8464f0b8aff7c9fe722319f98820a31887ef4963a688cca9a3562aa2f4430f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOHCM1101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e54f463413037d2abf48de76da913eeefaecd9583ed2ed8a414291ebbf7d9c. 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/NOHCM1101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a42c5433063a022fb69f183a55e7b2cffda032454fdda5a4114a9bbbcd2238b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NOHCM1101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52515f4e9fd725385730a2e27cc17f5063f5ac18df2855146645659869bbcafa. 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/NOX9X3672501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb25434f6a0bf66696bddbddd44d1f4ba2f4d587f7286de20359bbeff58d4e1. 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/NOX9X3672504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8ca194c47ff67d9bdf250f81b83319c5c3f1e611dd49f5cd8629369441704a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NOX9X3672509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7682f8975070221c6127a72e3e661ce5f06945b544a3655ace0568c9ba85d503. 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/NOHCM0600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ad8d1b5a8e67cc3dd421279b95f917a8eb35bc03c62045f45cd16efeb202e3. 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/NOHCM0600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7b50344a28ca7109caaf56c74accdeb5cc8571149d82c4a32d95379e47ade4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOHCM0600115.
En annen dans - Norske artister tolker Ole Ivars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad345aa22fd70216d4a0e0d88604240fd5f029e3b12b9564082ad865090a0f8. 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/NOX9X3509101.