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 0x24b70bc05f4a020da86a9f5dce10b9ebafc07f93b07820d344ab90bb667377d0. 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/3f19dbea-3898-441b-a618-94cb0da75d3c.json and https://artists.proofprofile.net/proofs/artist/3f19dbea-3898-441b-a618-94cb0da75d3c.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 0xdc22254ea2bfd978bf5a36638aed73b44253076d650181163ead5ca507751204. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZFZ52030734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb23d5d8da62b8ffdcae61255ce4a85d12ed0bbc50456cc9cb14eece874e4d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ52029987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba780ef9cbe94d4013c1be3a278f910f23689b7961ab400921c864eef8024c82. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZFZ52029990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a34bb2d11207707b45139f69e54cdddfb94e44a5749d7fdc6cdc3cc89b79fcf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ52029993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a584ae0fa0521a29dbe494b34623acfad8b7588f32fad8e73d8a8280a72257. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNWY2073347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e838cbf1a8d2c974ab23186134936742c20c47a556308676ea74b7d98b4eda. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWY2073348.
Marianas (A Collection of Ambient Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979e0f5979dcfddfc5fbc580efc85f744688db27cde29bb878563e7de96bda8b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNWY2082841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7840ebd60b85456bae58f64a6e91ed91eefef9dc93c6d92a9360cd4acc0e2ab. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZNWY2082847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ffa6fe0aa786046b9979f02bda26e3a25708872bcac1f002c66d6a0c134f6a. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZNWY2082849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b60e85f6ce139dddfbf7fa0164bdc4c73bd49d7eebd469836feca71c89e520. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFZ22147744.
Metamorphosis (A Collection of Cinematic Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2dd2c7478d1802c2b4a65db7d4c76b1c252cb79d0e7bd66e36426fd03bd7d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWY2081049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb986b3ca521e442cb11bca37882bb478eeb66201ab1a790bc4c11f438b119673. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNWY2081052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0b57c58ab950b14c9814d5c8e159a6a5b7cac07fa185fb406104b5d69d7532. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWY2097953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ac2e4025452836c632cb9c9a298db7fc463d21cc555194ba5d909b9dab04a8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWY2097957.
The First Noel (Holiday Classics Revisited)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e1c0435e4d224f2a637b3d656bf016fd80918835ecc480da32b7957285810d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWY2096100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa346a5bff80f3e6d283790a348944400cf59571451b553f15b6d43d755a6f09a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB32242634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5237d88bd617b80af165446d05e373b096ca0cdc4ef53cd052ccb91caaf2108a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB32241239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ee323b8303ba9d028c4d0cec1f480fb8815c69fee75da07074767cbde3e629. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB32241241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60736a70047d7dd2330cf283dcfa13d3d21cbc15e7a5ad7eedd03da98f892175. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZDA52459650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de92ba75ffa003d006e0c1f8247078e0261243dd6d5d6d00823fd6686bd7cb5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA52459654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee4e6ad56333c9b90ea78ec5195d147243464a3fd6f31aeec45cab6126e1d67. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA52459655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55179cf36a2e8a5c8e800fb695dac1b139689b83249278893919f83063627f7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZDA52459659.