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 0x51bec805b5953b5251ffd4eccbcacaf3704089f2cc6842b343e8c87467cb2670. Chain 2 (Bitcoin): anchored in block 953846 (2026-06-15T22:48:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/013b29cf-cd72-4373-8cdd-7caf9afd9d58.json and https://artists.proofprofile.net/proofs/artist/013b29cf-cd72-4373-8cdd-7caf9afd9d58.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 0x76a17978f1574a331bc90713123a5cb0dd0be5c75f0371bebd363b6dcebe7bda. 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/NLCK41402287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafdf4a15fb56230cdc26cc1f0434691102fcca78cbd91afe86a7f47cd3ea525. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLCK41402288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2396639b47bf91f7075d4f91afec379bff36dd75633a226ceee353c09b9072fb. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/NLCK41402289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0874b892393635e10980db4b89e81ca480311058dbdd1cf68f0bd7425fa5173. 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/DEW871704969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4014dcc7e4f8190282ba67d1d82b70c61e1f94424126c46eddc30b6b47416451. 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/DEM091300235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3ceef092602876be209f329ce6aa01d58898183a75e2306def31b8dc4cb556. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEM091300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209165f136034d798f3d8b3a8fc853cdeeeba5ee525e64918f46e35fe3051e61. 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/DEM091300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93885553c0fff2fbe082f71b85fbb0e8fc990ba8ebbe1391f33cb62c3b11ab08. 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/DEM091300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e139d0b3bedd04aa3e8fc073437289ca024d688f8226f6fd04c29fca21d7f03. 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/DEM091300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bde78c95a109ca1f90a1749ee276d0a571ab03f898950b31ec32ed057a9053b. 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/USA671200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e2942282c9cdda626a551132a1d5a408921a000326965b16c94a8a051c5c9f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA671200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0532bbcba332af0437d25940798f3d45640e31ee37a6a70fdf6d4501ef7e4f57. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GB7EJ1201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc405281317e55e5657348a3045e4568f2ae5b81d8ff97738433b4b795f20d5. 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/GB7EJ1201033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c976db6318ab763a03e7b3168099fee6b43abee7e69728380856f378349726f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEM091100158.
We Are What We Are - Balcazar & Sordo Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147b53ac017b24c2a747c4b7cdb8ec544c435ff7e8eea6e9731170c7e9e77788. 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/USA671200486.
Warm Sun on My Face - Sascha Dive's Sun Worshipper Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a0b2548fa83832fab34814f0ce52a05371d6431cd4a59e7faf4a3aad3085b. 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/USA671200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5da6c27f99ca8241e434964a8f82e53ba617bd49d3109fbcd6dc5fa12a844d. 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/FRX991586865.
Defected Radio Episode 121 (hosted by Sam Divine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadfe534b290ccc8feb3dede1913ce2d828c296a76ba4e972b82ebea5c2c0d9a. 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/NLPH51300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fbc3a07c752477c6ab4d5c480348d7d6818ee37b057f6b89741520c3054f67. 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/NLPH51300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b32fcdcb68e2b978ab3d74c35a9c3d7dcadfcf618a393bb61893ebbfe37b46. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/NLPH51300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd56d73e3b8038bb1e9e461bc4a5b45934f469a7e6d56e3a15464e6dcec0973f. 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/GBBXG1500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab686092b4d03146a128e2c511664068b2c98f8a0fb5420c24b7568ee673f3b. 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/DEM091500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025c309e5655d267c0035184331773854bc39a0d6abb66b0526a74c696cd3ba1. 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/USA671200398.
10 Years of Hudd Traxx: Now & Then - Pt. 3