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 0xecef93663773ca92dac27bd401ebbea615d748afb22f5c7cedb389e8df9dfc5b. 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/ee9eeeeb-b1a6-4dcc-bfd1-9ce0959d667c.json and https://artists.proofprofile.net/proofs/artist/ee9eeeeb-b1a6-4dcc-bfd1-9ce0959d667c.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 0x9d168731b436e1a3ccabc9833d4504ce7a84edb5ab792553bfe2b97fd6866654. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEQ022291608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbf3ba0bd800d4959c2a8a1a4f9ad7e959afc3d1654c3efe9319a7827d9e864. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:23:28Z), 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/DEQ022291624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba14bafdda06ae0c0d4b0da7a754d0294d5ef6a79bc520657833e51de42c693. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFF2332286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3010d802c025fb5c57e32d8431584f5ab4951ba8854df58e16a9225d92a925. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBA2397151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5839adfa00847fa77b8c13771935fc05f9cd64ec9bb1f9a92c2c7f74a956dfeb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFF2332287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe597c75209a2cb269f02c0ee8a80e90ab63342f0b77af769e5fdaabc6202541. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBE2312741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd267f65122a4a7a29d95b1c9af7d2df6dc5f32fefba1d787d23a2a6aed00b242. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBE2310587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e0a176a0d0a648a4947ea2f227a7467beb9b7e7409fa15bf77095395267d1c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFF2332288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2319cf7329cf26c8deea3a02f5565c4b2acaf11c5d8e37104bc05db41b93697. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFF2332289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d7d69519214a2597d5b69d6f18c0f9e096d17afe530928dd00f306660fa20f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQ022275721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761c6ec2c9d097ed4eaf5c44cf388be942186b05a38b356d059f361eb87b0f3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFF2332290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78fff0b5bad19ad107904efa3a247039de07e611fade9acd07a6f52c9fbe503. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFF2332291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7921c57a26173a1c53eb2aa7833be666ca702f36a8c5acb52005c00503aadcfd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFF2332292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460ab4498dcc49378246d5f9e934b96ea626d2bf8e4e0d47fa37a3c62a352161. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBE2312744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6a566d09963adb25b18ac2fe68c3a2c50373c8bffe73784bb56aa9fa47cbc9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFF2332293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26efbc32442478ee5fb39b605d08eb418d5804c203da13c40970a787f629c8c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFF2332294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460ab4498dcc49378246d5f9e934b96ea626d2bf8e4e0d47fa37a3c62a352161. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBE2312744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe597c75209a2cb269f02c0ee8a80e90ab63342f0b77af769e5fdaabc6202541. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:07:14Z), 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/QZTBE2312741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd267f65122a4a7a29d95b1c9af7d2df6dc5f32fefba1d787d23a2a6aed00b242. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T16:18:13Z), 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/QZTBE2310587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3010d802c025fb5c57e32d8431584f5ab4951ba8854df58e16a9225d92a925. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTBA2397151.