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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 0xfc893003512afdc38ed3c9527c3231875cf8bce77ecbeaf69111ae6c02517b56. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/caf24b44-e484-4e71-b319-1b9902417aa2.json and https://artists.proofprofile.net/proofs/artist/caf24b44-e484-4e71-b319-1b9902417aa2.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 0xacd5a7fbbd5713f99f862a660cf1b0961aa82af12414f75db42b94d169418ea5. 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/BRSME2001653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed797a56a232c29079b3e4c70ecb5c997ed36829338dceaff752522349eedd4. 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/USSD12000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1a04b57676d248fd0d727934899777fa6f3e7c84ca0fee0e5e51542935ffbc. 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/BC5MF2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f2e327e0f2541a9d4efcf553ba435b83d26795566fa9257e4cc9df7995cab3. 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/BRK152100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd750569a9646dd8b19767ef64f57990b28ea0fd9baa09af2f5756d6840bcb0ac. 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/BRKO12400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c303b0b3444748d28db484bb5cfe0e4e43872ddccdb2f11cab93816553568c. 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/BC5MF2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e4fb2e002212f2ac53a86e7fac43d50189afa3c3e71f5c306663cc3b43c226. 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/BC5MF2300010.
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 0x24ea65683dd8b09debde5a4a3984bfd3556bb89bdc150780538fb22794cdbd04. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BC5MF2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd9e285f96de69a124e93dbcc35f2aaeb697ad884d9604013b2f3aaac583287. 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/BC5MF2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1aee0018a2a6fd1d7a267ced2ccf5771030b4f9c4395ff24b08b253b728725. 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/BC5MF2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49146f822bf9153f7549c86e609a17d0dbedb7665d39242ac34b678b4a215cf9. 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/BC5MF2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4df5b941133fd66ad316446d0e9ce8589626e62e9ef41840c0bb8199540cd5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:05:47Z), 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/BC5MF2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dab9e38dcb5d32510ee029d40fbf289d8cd3246c0cf8a87ac6247db9da87e9. 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/BC5MF2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2b1413617f4535945746b6a13c1789a674f7051e3eef326ffdff26f35754de. 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/BC5MF2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fa22352170b4358cbd1b58313c544193fa4bb7764968bcd482676705cdd1ea. 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/BC5MF2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49ed9b3a09d123d543207bc89b7a6a5efdc373e5b6c6bd0a55ab4d92ea9e0bd. 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/BRSME2100628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33665e5c1e0f51af4226d4275e0a3911ea65beade0963a363e5006dd19d1289f. 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/BRSME2004099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ee6280b9d28f54520b28835b6ca6433a6f7905eafbe0fc5e0fa08cd787b7ec. 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/BRSME2002770.