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 0xc7b13effaa3272bd7abdb34017dad1bfbc8cf32dd38afdcf7daeb21ce0a6f47b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b81f6c9b-9132-4276-8b76-cd3e63b92e70.json and https://artists.proofprofile.net/proofs/artist/b81f6c9b-9132-4276-8b76-cd3e63b92e70.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 0xfe105b3cc0d6269d092f4a67a4fd7e2d80dbb05f9687fb35289702847bd26431. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX3Q92425288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91f64f78c5ac18acb6a3606e5e9fe9ac74518cb9bc902a1adab07ef17c1a906. 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/GX3Q92489037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd855b37b5fb6cab0f93d1c7c161e3cc4f427c018ae2ac0672921ddd4f2e1a0e3. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GX3Q92489036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f57a004ee502a19073fff753c1c5f8b88323411dfe6bca27fa37e8a3c1a225. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKXN22459581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ee921c98e47f5709051fabcab502f9079faa3174267cea33b739f1266529de. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKXN22474513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d13def583a310b29830ec5502f30f427cedfb6d135899fcaa13f1ef49ff28c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:39:05Z), 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/GBMA22422968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdce4649fd1118c1ca2cbd32282d11bc4d17a120573845b0e0e1234c5a73e82. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMA22478770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2593302f2b034e2284f6ae793d3d3936482c9edb9f55295c1794a75af5b88a2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22390181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782f35c8154669fc394618fd76d4103a0040453bbb7194e8d835883f91a9ed7f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX53U2345500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934dbddec8eeb174e50796835fbbe86b2d488e4f6e79064de49af897086fa509. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GX53U2400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2106e07c7db3c9c3cffd125c1198f7c9e78e0ead99f41e2095ad103b09d5b0a6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX53U2416385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc692b7d9e5adbd61d283d7ed0fe9e1f1f4b4e57ae15c6f307e5f90d8f546a464. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:00:06Z), 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/GX53U2481121.