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 0x5d2934339add87c5d062b395689bc9fd755a0cebff7bd3df84f0d4320bf9b95e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb4ced3e-2696-4910-aa69-aeab3565387e.json and https://artists.proofprofile.net/proofs/artist/fb4ced3e-2696-4910-aa69-aeab3565387e.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 0x1090d0f103d9290a5cc75ebd0cbb32f6a3f72c65e0a4f060f344039eceb4a142. 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/USHM90856036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089972dbfa375e61f712816482e2844d4f63d7510738e3ded26356367218eb44. 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/USHM90856039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d1f9353a2e4bd5b33698b3af5978583859d0768ce8190657235342c33ee189. 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/USHM90856040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25475fba84a0efd548dfb6943a40782b25f8d9cdef802e66c68239d3203e07ee. 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/USHM90856041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e9cc88c1902e605943402a68a2293dc0901719304a2d94ea483e5ea1aba159. 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/USHM90856042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4642c7a4c9d8675ec58e08458a52fc336344005b6b775f3494aee7fc7a4a60a9. 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/USHM90856043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3ce97bd4c7844963575a8661b27792efbb47c0cc774a2dca2b37fa7940a301. 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/USHM90856044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ab59cecb78e45c06dca223b16250988d5c2960447bcfcf16e9dcf845891844. 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/USHM90856047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2587049d8e07a0d2fd876091fe6836ef4960b77d7895a2e5b2d38b1a834ec948. 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/USHM90856048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5224baac09b17957fadf74c30a0c2eb33f0b6d99ae89e7187f15cc45ba172b4. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM90856037.
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 0x3ebdc23a19e723ba1278fcc004b24f1a0594ce6ba193a1f0956869e1e41d2246. 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/USHM90856045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2645fb34b9352e28037dac6e9bca4d02e8cb312d97b34e42a8a86e4d5a61ba. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM90856051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d9edb733e74e9b6ca6f7c4e62f4ca456729d5b516f299f1d8942ad428ed3f0. 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/USHM90865738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0104966bf86501c2688c0d972d21c30a1bf71afd3f341afbb832ce69870edeb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USHM90865737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dbf8a9a3471b59b1394c1b152be817cf503e39727cf44d8e6307cc559b7cab. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USHM90865739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d2e8b18740e5665802f702d2be50ce9077d0c6d992af3078c037c696b735dc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM90865740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3ee2bf34d52df000eb10a6bb404185d9aa1f4f238dcec649667bbfa05b2d85. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USHM90865745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fbce20274a6d15e65bcb6816a35cd39aacbc32c610b39d02ea42a61c05208b. 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/QMBST1581005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4398d596c9ae7cef68966155aab6fd20aec1452c1c9021b43e9b0bd3899f6170. 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/QMBST1581002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b850d73ea38bfd3b20481527b55a717f8a3ef4b08c8ab6457639bd34134c89. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:31:51Z), 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/QMBST1581013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508f4719b223999e28758c9b4d8bf3c16db87e8fc3ab552db863d3cc78d8434b. 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/QMBST1581011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c1be5a8287ecdd3568be08bf3f337c0ebbbd088481cc1e76eeaa2616b22e3c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMBST1581012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab463c6d9bfd71daa46d88826a7a416143e4b782af68f32ea584a91fd4702cd. 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/USYSA1900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395775318d25949f5918040eaa0687bbb42bc354d11e00f20a6b35317ce69c82. 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/USYSA1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a4f5b90ce424b226365de220cdab103d7e3cb686843762dc9ef129f756f0ae. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USYSA1900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4961b0e9c7efbc6434b69f538b0530e32658bf9e63677819b21c03af134621f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:28:59Z), 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/GB4DA1500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f62b25b7d72e6a0633cf5ada49d69a491a848c09ac6e53ef63b3fde12e1c7b4. 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/USCGH0941494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f99db642e845b370d56e44527b4c3775d02aca29e0682679c37a4a2045811d. 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/QMDA61333099.