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 0x92eb36523479216bb80fa0ffb91d546ad4f1ef75af0fa69615935ffde0818af2. 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/88efa390-7178-4238-896d-0a715121c753.json and https://artists.proofprofile.net/proofs/artist/88efa390-7178-4238-896d-0a715121c753.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 0x1630defdab141291c2e4a53928c8a78525b420959ad39b11ae9c95bde532c2aa. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITZJN1800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e148b075f78e205851abbe1d080135f3a156d6a2b60305e2f8a995b4b02dee. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ITZJN1800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102c6d3fdeeae0fb33e2f817a56494fbabd18595fe0c3d64c8e8d7d527f2578a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITZJN2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23be97a3ce6bea0e3e46c07265e2739c8431b470f422f483b6ff3459ac8a0e2e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITZJN2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba7dcf09a3716df21d76a8c99c9f37838d9848b9061c26c5dafdf1894b01c48. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ITZJN2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99068d8553344b9dd9276e65ec7ca942efeb0ba3311992ead2f996e77ba7aedf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITZJN2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffd329c151cd509d662c17860bf2bc61cb7c8243c588510b638185eb266e311. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITZJN2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb280c40879abf2d250689d6497d4cdfc864730d11cd336980321763235b013. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITZJN2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6e3969162e99424d10405ccfe7af43915737fbbbff01656eff7fd26f6eb5a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITZJN2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd921ed1ce8865f00109ff9d170cfb01002ab84123c77db7d9f8cfbe7af5aa2b3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITZJN2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf893bea9108c339f9586d53d1d1d77dd0977c53bd9694396556986c309a5ed. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:10:32Z), 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/ITJ872400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940762eeb3ded360fe2447d62c19a16c40879141ec6feb101e2e30ea23fe7a12. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/ITJ872400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36f2f5baa1a9aa3b2deae0cf245723a74acdf53830743e325e46a4f82bd24b5. 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/ITZJN1800064.