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 0x9b22dcfadc657b59105dd4e295637e2e814f712a46c9e3aed14bed3095a099df. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e83a52f7-ceed-4e93-aa3c-5a869dbf7d9e.json and https://artists.proofprofile.net/proofs/artist/e83a52f7-ceed-4e93-aa3c-5a869dbf7d9e.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 0x28ba040d1e77192e57634375c552c3d5d278228439acf73ed7de4424e15cb8d2. 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/BCTZZ2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f4b48ca50e4d64f8e2f6f1a7cd2ba4046c011c8e88177a95249f142eceafce. 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/BCTZZ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f6a9e88b9c9adee3435d24c70a4a48fbb0a14b1ab0cf081896bf4dac292748. 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/BCTZZ2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f85f9282e42b1c192e12724a175f9c193b9bf5364ebecbeaa3711fd7e41c02. 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/BCTZZ2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0868c6f096e921e2954f89a37f4321fc0f363bd5fcc58b262684dbd40a0cec2a. 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/BCTZZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a49184d008b0b68cb1f7c2319f64de7c06ef75c2a449fdf48df71cbc0d4a8. 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/BCTZZ2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b10c8b1aff1e18e58287b5c6701905941c2f5c7c19308dd4edf9040b0cd364. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BCTZZ2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaddeab0e21479752f6182b66d1c3310a03174b1e415c5572c52a02527a686f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BCTZZ2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd6e15c46e44d3b87404cb5363c170bf0f8ae4205f355c9787867bc7f002118. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BCTZZ2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8a5618d83ac92f6b4124a42b8d93315b5faa5a1efde440024d1452b59d75d3. 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/BCSA72000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d52627410b2d8ed892569e4e5a35b84d3899dc7cf49040eb676abd4cd4b51c. 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/BR0WR2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49b78646febafcecad0d46513e5d1fc83b95b6a1dd47eeb30f2d240ba5c77d4. 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/BCSA72000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933895ce93779cded4b13a8f83bc4524d056a0a849a20fb8d925fcaf381ec67f. 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/BR0WR2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b41d1996bfb636c91e1dd5e5579644fa105940da2d303dae5755dc1e9103d1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BCSA72000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cd1b42d3953a6528667133d61b7e36d18f0e2c02a4b77346614d45359a687e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BCSA72000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10160aa66be550af601719b8d2044488f3848112ab13ae78a4cb41dbf0a8ce5. 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/BRN4M1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81145afc96e0e9df2d93cce8f0e76537e37a25425a0eefb1852d935c8f13021. 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/BRN4M1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe5dd8bdc16528b895eb06ea22579d38aababb5b3c6be7b2f67ee936e126420. 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/BRN4M1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e0d64e31374c407011dd5e81fe02e7d4e43fff62002add0bd3c4e2451f66a3. 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/BRN4M1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf61f03ff4e36c2ea46a79f6d943587196027687935d5b2d9fbcfdffd332293. 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/BRN4M1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac4c585627ad4a5119b0b3aeb8e0932ad856822438a6b78f419e88799b5203. 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/BRN4M1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7334b1a3d5f895875e49d667f06e2652fc755726ccb6e9afaaa0f50ac8d0002b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRN4M1800004.