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 0x3dda36bbdac81148a59d0d122c52741f85f070b910c234b0ae5d51b98c402b45. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3463ff1e-e019-4555-b557-f3b360221f96.json and https://artists.proofprofile.net/proofs/artist/3463ff1e-e019-4555-b557-f3b360221f96.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 0x062667d84a2791538560195c294eeb6b933defcc7bab73f1dbbefb0468338fa6. 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/NOZK92301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a07eb9a221ae91e05e54a7e433582b2188a802ccf01f060592342359bcf8f9c. 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/NOZK92301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7aa0e8c42fcfd134093f36d5475235f92a57a6d5f262c730343b241ef68a9. 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/NOZK92301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eeefd908783c882eb79111a4b2727fb74e7d31de48cefa9435795a1cb2072b. 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/NOZK92301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f5e0d6374dd2e275a7b65edf6a65ff05b15b25170026b1e4268992bbe6b5de. 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/NOZK92301180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84be6d89b7ad8215799d0d1a0b32291e04272ac84908e08324ed5e19d275831a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:57:15Z), 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/NOZK92301020.
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 0x857ea5cdf3095b4f592497c34fc256243bfa9c4b31e337cea6c21e9a19ba3314. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NOZK92301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcbe2f63f4f4e36e838464221e0fa3c5b31cab8dc914fe278dff4e9f99630e9. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NOZK92301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aa1d7c063f8e0b9a258acde00e7e7a0d158a2a7a0e1397f7c5e6f4fe0b4006. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NOZK92301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538efdd911823f04ddebada5beb69440972e56836d30084ecfd99e4f78a1fc6a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NOZK92301090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc76a08e69941413e4f7b56a21957d7eeb9cbb652f51ec156e1cfd7b015348e. 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/NOZK92301100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2801168b6d208fc980bdf4ba5d1857f1248ceea0c943f91472efbca07a25f428. 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/NOZK92301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e744dbcd687a8694c93a61ff75d159596b5bb24d830f9706286add268071b5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NOZK92301120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418f4f2c6f34914691b945be1477f277891e5499b0855164883619a5e547d310. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/NOZK92301130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fee3382046546e7516fe51154a73883c640944dbb2d2872cfc05f1bf19fbdf. 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/NOZK92301140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7daa897933b08361f4d71e63a304c966982eb46821de554be2e042033635245. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NOZK92301150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1431b7a563251c565d58e210477bdcf450bed2baba684d0209e74dbfe7ef9d3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NOZK92301160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3abe2a76a009200373993771155f03b76cd5f1eaa8b05a13fbe6fdbf749884. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NOZK92301170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad9f10cc61147ac90344e89231a00f9ed14ddd42f45c62499848ebc24b2324f. 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/NOZK91901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a029d1b346136bc27418d69a1368439ded73ea504cd2da1cc5e2ee4a89eeb4. 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/NOZK91901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcb9b59f17f1e83accef2356418690c4ac69a856cbcdf1ca3c0a0d3d4e85943. 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/NO4OY1901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2001f299328e111ad1843f37a52160510060d90c57b9717c302df9c0c59657. 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/NO4OY1701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a72e1ac1994ec38d17b60bf397a7b3fdb2e81250fd58222424b7fde8be4347. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NO4OY1701020.