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 0x2155ef4a2b5220943cd54b6f10e6ff2cb1b1877ba621e09647e7dd3364c99686. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b19b4ff4-bd32-4cdb-bf20-32793b05434f.json and https://artists.proofprofile.net/proofs/artist/b19b4ff4-bd32-4cdb-bf20-32793b05434f.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 0xde17a98d802071269d8078351063ac14495f1264baed694a799b3f8867b04e70. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:15Z), 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/ALA082100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3232400674df3b68cc35715bac6ac0916ba6000c7de6d3947c25b935ea2ca7c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZAKB2369039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484ffca67d9a9b45e8d9b91b078d78431db4a19318f69269f98de478ca4ecfc7. 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/QZAKB2439481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d81a236c1bfd149d551c47103d1a4b07ad6e70e998c9087a876646f781df18d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZAKB2443656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834da9ec3eb91c0064d28ab030687bd6a24977e50529fa7a27626656bfcd88af. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/ALA082402465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358afbe349149ce56baa3beddab7bfd4f5673fcedab30fc6b435f52fb51f3c64. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ALA082502487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e0d25b457d3934ee49dc60e750724b651a437ad6bd0e3a3628a32928be8d3. 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/TRBPU2500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd9dbfb45ff1b6cf7807c13559ac1b97abe71f3ca9d7e89537ee8c134b1c053. 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/ALA082200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe373e43845c15bf755c9401a6bbadc7faadbd05d12cb6733d91ad2b22abc2865. 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/QZAKB2342894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eeed36eec7e94daefcd2084a424405185e27a6c316d58d9788697831fb1c34. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR10S2359386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf0f3278da14105da81989a6b4f7c71987a9cbf94e612f709807d2e141ea973. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAKB2304438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590ee4016ebf1120ada65eaa3ec9e57126aa4ec4899d09c4d4ec7ee40722bbe4. 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/GX89G2218884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10511b0131beb0f17bd90ea0b25571bce6a700928e32a8016d741506320fe215. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZAKB2379963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daad184d752903b8d182b068de5d1f87b280d80f575012b90e164bc8016eb5d. 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/ALA082200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6032890531f797ac8478b36f29775526b8bd47ec5b7fc58fede6ff50ecf0d6c3. 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/QZAKB2379159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265a091d54b39cd01cb1d451fe38e560e8fc4c9c461e10c655bea9dc6091bcd. 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/ALA082100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf6d6903e2d3b474f769480219028f087dd393d23194bb1281893644ff4b22d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX872202361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d2f0f317312a2ffd45be5dd694754f0451f7c62fc88d473fe0204c8db3ecd6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLHR52186363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85dbf3c7d8880eb9e241761ed586189d9475c7de11a093281c361d335e7b25. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:31:34Z), 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/QZAKB2376986.
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 0x235b6b7b42a1fc3ec90cd49fa4156d89c4d9ece048fd081a7b228467bf1a42dc. 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/QMDA62370102.