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 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 0xae00a555c1dbf5efd1cd5b9d4b8baad8f35b5af2c5205e6da2e73dd8ede0ae2f. 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/f90c0a85-ba86-4ddf-8a26-27ece24a6c51.json and https://artists.proofprofile.net/proofs/artist/f90c0a85-ba86-4ddf-8a26-27ece24a6c51.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 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 0x774c8d0fc4ec8024aa4b4bab7f3be3dcc3ee40e239f802b99670103ac1323c41. 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/DESH42200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90538d2d053449724048594d4db11d836475a9f704a950d498c464caf0cbb56. 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/GBEWA2400580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cc8c2417ab286a743c7c164b2f07c5076f3549990de1dc2ab4024f809973ef. 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/GBEWA2401570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefe5b310990c67e2d138f2427f887d7dd8360e598c9f5e700ab29154a9c381c. 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/GBEWA2401571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14abd4640e031f7992701ad5aee090d2d2a45f23526951bf9a623d5459834fe. 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/GBEWA2401572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954baeca9544ca1bc1839094721c9b2bfe3340df77d68f011326ef5da19b8e6. 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/GBEWA2303404.
Tons of Moondust - The Urban District Remix - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219a499029147aa7cf8d7b2b20a789abb53ba5f62c01cb6ca4609221a1db882c. 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/US83Z2216341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694e8a366782137756f3143fa348d90ac0120d314b9e221e13c1034f2688c3d8. 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/US83Z2215322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60566fa085e7c5e035f95f7ff19fba856e5debb28d8508950a61ea7e1b08c9ff. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US83Z2143825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c3925ee94279f4a620985392aedb59270b8db1eea07564a691c5b28f52027e. 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/US83Z2143826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825429a7101533e01364e57f36eeb3793cb6690c279083fe5027ebe32c86e32f. 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/US83Z2490876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc0a8b8e3a998a85d86174bc63e17d75f706c33acfc0fd11392f16c0232747. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US83Z2479475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe886bbfb87ceb50abf735cb2c02fa0b83c411be676446c62c537a88621dfcda1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US83Z2479474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95eb585a080edaadc183d76e2014776b6fe8399db0f7dd138c3325ee458c5e9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US83Z2471161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe886bbfb87ceb50abf735cb2c02fa0b83c411be676446c62c537a88621dfcda1. 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/US83Z2479474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95eb585a080edaadc183d76e2014776b6fe8399db0f7dd138c3325ee458c5e9. 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/US83Z2471161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa20e01fa1470521a6ccba51d3fd52cd45d0bf2f00a28157ec0fc45e9bc33931. 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/GBLV62316089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19cf697a6b0ee41f086a8ddf0856b6acc6019cada5114cd6cb11dc9f67a60a4. 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/US83Z2351796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a641ae2a818812a7f7e9970ecb9ecb8b55d1ea9fae016ccf0498f8cee041006. 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/US83Z2038312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212728030cc1dedf126ab53eb81bbcc057bcfe1e31b1f12771ae84ca3bf1b71a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US83Z2038315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3405c8bd9c09e2bdb9675da5b2e293091c33b22ef2a9e19856f262cbfc864e02. 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/US83Z2038313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d551ec04f702e30be959121a837ee3ff8029b7d26352b7a0f0bb0c995cf2758. 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/UKACT2270924.