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 0x316ffe8190f55ae92d10f220d01ce3c5ca97a13faa4357e4236ea65443148b39. 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/5065452b-b47e-4fe6-9079-9da5f1c8813b.json and https://artists.proofprofile.net/proofs/artist/5065452b-b47e-4fe6-9079-9da5f1c8813b.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 0xe5f5f858b7bdf811a31373b17876410c83777e9cbbd17dd68e7ea463a764bb46. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN82229482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfca7f61ca84c13f86f7acdabf1112d19c9ad16b53e118aa7d2bf96833a1e890. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHN82229483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea55e024911a7913c8e659186c517bb29605ee087307252df42e4b56deccca77. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN82229484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20713b4119793ab2e97fd2c923e0d7e5f771876ac9bb7be75c3df1c02ce2afba. 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/QZHN82229486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627f5fcf55eec700dd71fc0c08e2b8f48e9f9811cc5b8afbf1163d35e7e51db1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN62281278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66d205b18a85f93005746771031fe06d51d846a399016e7bb3fc03d9f97f7e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN82291682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f36ca20b1fd82a27ec5b3b7432a8c6339d52939ae8675c507e19498c62c38a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZRP52278231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd462bace5fd701343fc143f1a472305941d65316470384d582c6d242a0fcbc9a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:11Z), 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/QZNWR2314277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128f1fb5461b1f8cb7171069e8f1346eebb85520119230e20a6f876b9cd2632d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTAY2384178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ccf4c7a116b3374751de77f05014e53effe91ba08afabb3846610d5a42dfce. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTB52386490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07fdedbad102348be04869c685ad211a0be0a3f80f49677a10e7a90c985e825. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/QZWFJ2349505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89cf1cb9a558b3deb2f031e1d6da4294d6caf8d24dc195503b48d1f9efc51c9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNB2429905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c281b4c2fad1fc892f1f0c6b9e9ab93b2080c0bfff58f1b6667d736db91c5a. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:36:28Z), 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/QZMEN2467014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a59a8e4136979b7da3e719d02e2bb331ccb8b55de913ef95d8425e89b9e695. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMEN2467017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfc4abf69246971630cac8417f1c6e0eca6e4699bf472953d4c514b2bdd941b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZMEN2467019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f55d38508c05e70ece7887d87d939e34ad371c3c83316540950cd7cf183323b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWX2498427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7501edc8dd244ae69778cd13a02cb4196631bffadb97d98a8bd8f2d7da4a71. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWFT2477319.