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 0x42c98e36696f825e2a88e2dcd862b0a741d998070441fd6abd62ccfa3892f6a7. 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/b2697702-5794-46a8-bd2b-90d327fbccdf.json and https://artists.proofprofile.net/proofs/artist/b2697702-5794-46a8-bd2b-90d327fbccdf.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 0xd6c81b1cf6ce044ac360c0c3e3db53665ec276de5394d50eeeb944799e5e2086. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ7Q2425095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00efffd29da0a3048782365bb69de77b63bd7557a247cc2e8931978a9ae30f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7Q2425096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0e3471bc7964a9ff8ab7900bd22fb74bc5a6ec551693c2a76a7624a7d41eac. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZZ7Q2425097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84d584ad287a8a9c611fe04c0db50df13b0106763b181fcef630c1e9585111e. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:43:20Z), 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/QZDA42564619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd26f30631ca55e0d454e9cb884be29fe4993a16f63ab71a5c33baf4f5ee781b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:26Z), 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/QZDA42564621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f14ad6ef3f7b06e211c298897333de06cb7136d519bb348577334cc8d06168. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:36Z), 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/QZDA42564622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda09ee72beccc6e19a65f9f5f8b0522f0ea8e0664dd0ed652f1e7cca862fd4b. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZDA82524464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928a172b22291ceab9af2f01a45fb6319b2015f21062d204bc928e9d2714684b. 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/QZDA82524465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98cad5d9c9048929c83bf094812054fc698fb4e7a5fea9ce6df091f4ffcfa92. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:24Z), 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/QZDA82524466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9b7724c0cc16ad5914260bc5862b75d0c2a52fc22f732a98b39b2c33b673e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZDA82524467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8aaa033331859a10fb68de75ac30934c445f2db779823f3b161cc047e1d376. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN62505185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf9b2dcd27e950c946d5c64ece7e485cf2e1f1122d923421323590ca0eb883b. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZHN62505186.