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 0x75fa0f5897eefdcae6d6d35e7a946360e2aabae1e2eef09d4fa4d98759b451c0. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fb1e7ae-61c1-4003-8021-ffe2a2144348.json and https://artists.proofprofile.net/proofs/artist/6fb1e7ae-61c1-4003-8021-ffe2a2144348.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 0x2e2e0c09dee91b750fc965dd3eb3bd2afcbe81b11e886090af02be72739475cd. 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/QZKWA2317404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe23a4a234b2bd9a998dc7ca93740b06a2bdb1848d972e5f1b5c781313e0a02. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZKWA2317398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b330c72037b469bd52478b57db0a7311796f0468dc22c5184251640696f94f2. 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/QZKWA2317407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703d281e4956bee378c5f2cb6221fa3cbfe12b0cd8af1b509e7f451bd996963e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZKWA2317399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8462e792bf73d6820c314c8c818d8171e753c64ff7f152e28df27a8ac7b65da6. 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/QZKWA2317402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065d7a8940ab4c7910ea038992cc695e107541fdd2755acf676cd70fb4f8d486. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:33:14Z), 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/QZKWA2317409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdca3d408bb38ccf942b4e556cc7c77c9fd3433d23e8fea3e17317ff882bda88. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZKWA2317410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a37a6b676a11daf6f85579f5267cabc39bcf09a29e7e0d180335a233cdd368. 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/QZKWA2317400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c91dad7120e68d5913f9c175d03f5564b30f4dbbd77645fa9162f4a21a0d70. 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/QZKWA2317408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692b989d3d7f2cc7f2be25cde3dc9f2fa8e3391745f4810d401fb563facf7935. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZKWA2317401.