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 0x936b016f00c826bebc735c3ae424d372a525b6689a7548fc56bcc7ac7bd4f3a0. 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/6a741eba-0dd8-4399-a6cc-fc91a55bad77.json and https://artists.proofprofile.net/proofs/artist/6a741eba-0dd8-4399-a6cc-fc91a55bad77.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 0xa05bb64704207e3c90a6cb3d05f1bfa7dd41f667bdfa7e3821ae56b086cef98e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXJK02300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194a6130a83bf6fbea4317602a15a1ef1acd9723e46602aff861176a1c3d55be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXJK02300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d5b56b6f25215b5789f533ba03842bdecfd6ab1d0d4ee67084b329ee52db0e. 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/BXJK02300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d726d3afcbda5a514d98ebb012fbfec9bb2a0186e6c9d98cdbb1e39cb25479. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZTV32213307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8801e50f1a967d573785724ead1d451ddbbcab11e9cbe2c517841114f9698d13. 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/BXGPX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfa94d5c2c4b2fa8ec13810b6a6d70570c72feb875316029466386f965e3676. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXG6R2500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af7b5884a07492d8d87c303afcf84e93aa21ee6ebe31dca3e62acaf0086f38b. 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/BCJUX2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885007c56a6d75faa70fd7f04ff0b6f3f61681be159265fe16c3464c10f1847b. 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/BKGFO2417021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05b5eff53f7bd6140967f980d036249560d0b7de85f546e49dfc3e5474c179a. 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/BK4DA2321380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3333e2aebe94919ffc0b429b1b45ec85dabc40313c51563fc536b45c1ca59a12. 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/QZWV32322140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f43522111a342a354b9f689cb5b081deffc3d83b86ff25e71cf8bed68dd18a. 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/BKG972300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1ea0d92b66c4c43bf16357763e2844f884f0a09cd14b88e5d72b6c2928ebd7. 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/BKG972300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf8805bd10bb8469c7720abd78ff923b42e41a77212ad14405168823d29690. 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/BXJK02300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7996bc07e58b4472746da5ac5a779aa241f9adf6c35d4473156b06f8654154. 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/QZW9L2287338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9052d4ec5a411fc50d100fdd8cff22c6997c3b4d5c7b5725aecad54e3eb1ce. 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/BCA5Z2200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8e6a2021fa1d92a0b5b441f0614d8b79377160d042c07da8f033f469d725de. 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/QZWDD2260449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae61ed11246bb99fe8952e77e61d26345deb76517d2a7f3363979008394dfefe. 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/BC3PG2205284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac31f563f7c5393aa2d8624c7cedc9a4e7539a0df38453ea0e530697600eba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXTQW2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4107cf79664511a61847a5e98b7aa49402ab3344c7bcb36b9844b4f7966b595. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BXTQW1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654da2e5e7ce2a86236b3a5635f9450fa68e7b999b7df4387069ad17e2c61686. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXYA62200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f43522111a342a354b9f689cb5b081deffc3d83b86ff25e71cf8bed68dd18a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BKG972300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ca2e4fb1dbead920ed982388e5ae419e4ad8f38adfb8a42f03d87e0922352a. 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/BKG972300005.