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 0xa9552adea163686d58afa11a7479d972820fff24cf6f05e52fd885751bc2b252. 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/5bd3d19e-00d9-4070-a62c-4d0a3a85b209.json and https://artists.proofprofile.net/proofs/artist/5bd3d19e-00d9-4070-a62c-4d0a3a85b209.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 0x4b85fff5188aa7a25f828fab893ff0bfe7001d4188d2449d9e759be12d6090cb. 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/QZFZ62393143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5382a402f0abd60fd0786a5683a0a6e178b22ea39b10a0965863c1d1962d4d1. 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/QZFZ62393144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ffbe12e4c3421398a869adf822e2b9832ed6b8600c3a6118f867d70754a7c9. 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/QZFZ62393145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c13373954b2184dcd91e8388ae7ab1e619960e5ee8d9f9c40b737a292f6d6d. 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/QZFZ62393146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da933c6a12be87f26035d69e914d35de71a67fe04db8a139605d2e0b050783c. 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/QZFZ62393147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccaec135da1cbdd2ed16794a500043c671800357a304bc000b367cb53b5c94f. 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/QZFZ62393148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451268a7197b93176d4c2375e8dd6745f2931d44c1f7d7f6aa0899289af981e0. 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/QZFZ62393150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7002a9f530c8bca11cb4e2de0a1f6fad04877dc9141e4dde283998f5d1bad416. 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/QZFZ62393151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf18ef82a0a861878ff18cdb7c92c83d223c3f3e0e24d2c1bbd91395d4463298. 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/QZFZ62393152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83548ee4224bad684bfd77c26df3b2f577ad8e43baa7193130713e0727e1b009. 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/QZFZ62393153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93f0c37a3892db034433551f713878a7c06f3b922ba5c5c98fcddacdc08b839. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZFZ62393149.
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 0x32d0b335c36537d4261b1fdae98503a1d875b24dc7cd5ba3779cbd055151928d. 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/FRX202111670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8bc13709335ed72c4de4be89b54b786f39c2e6b7574c6bfb3470a7f5fb5e75. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFZ62361077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e614e13bdb2f949dd80375f34a1e5e296bbaa6668ad7e7a30afd4c2bd578b6. 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/QZFZ62361078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ff252d13d39f2133866e6a04b2cb11d9d4355627e3dc966a4d032927584376. 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/QZFZ62361079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73718880c1596e567fe1acacc58289492716cc421876b2a009ae1d348af9f7c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZFZ62361080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce60f1e72ddc628ce446992980f9471e87ddaaacb8fc5c6c48a4185f235d027. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZFZ62361081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6f01a7b88d8dcffb32a67ca625eef85aeb82ccea44fc953b60de7c07e2bcef. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZFZ62361082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c3aa60ac598aacabb0f27d2a32dc794d4f9ad9ffe6da1e3bafdce056571b0. 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/USDY41980375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb832939ba3d9746aacd69d91ce90c9bda9393519c5eca9bd7a8f92cdc293910. 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/USDY41980376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2030907a4f72bc1b0a4bf9d0434bd234c547a414de0a0f90a363f8583a8ac9. 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/USDY41980377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8231d34f975aa31c8b02e00b47526de1d6bfff21344a62fa3542324f0a9e7196. 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/USDY41980378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64cb82b2e9292eeef994f59dcd5335359d2685783a0f4f2d5119d9eaeef7581. 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/USDY41980379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99b620d13f676f9b83666af9e0c8a68fca2485cba9b838ab6420352483ca8ec. 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/USDY41980380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffeb0e4de0de67231675fa0088cdb97dcb38897fe4ebb516c79e771330b72d1. 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/USHM91875011.