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 0x24931c3cb78affecae5c2294a701a6e2ed3da6306d0a4115fc88afa123b642cc. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7a7327a-dbf2-4954-8733-2b4f412e8ac5.json and https://artists.proofprofile.net/proofs/artist/e7a7327a-dbf2-4954-8733-2b4f412e8ac5.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 0xbbf2f29b41129aab75c489f96435ea137c1de552927ffee650dd7eae2fc212ed. 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/QMBZ92280647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2832c37f7918db4eb7c32fcea89a7a97ca3ceeacb0b55bad77284b296a3088. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES75E2300827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac4a18b0a4415d8e4cb6a9f2bd026c5380755fb4e8e0988f765504b944ade21. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES75E2300831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b00f73d3bbe23f58f865eee5baee17ae712fffb827a6c77051786dc8918a50. 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/ES75E2204660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda03d4226875fafdd61795eeb6674d3bad3be8cb17da619c740ed12cb57e66b1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES75E2206722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a00151e9920636301e4c964ffa26ab831cd1637ea63e1090494499d76c026. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:07:10Z), 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/ES75E2205758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa786c2961a0b6ae31858f1294e8f35de55d2e4bb5721d0e0e2613251f011cd7a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES75E2300834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdff157a1481b0278b6a9d39d8d2d3f196d4f08c0b1991e573a8d31dff326b2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES75E2300830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1fffccb49944a7381a7207fef14c1304482e079c287dc246183a3b12ba6fef. 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/QM4TW2312790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57bc12f525de16d925208461c32a85c30b43f244f3000189940a7ef5d63403d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62201033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1543f2403eebb9eb9129697224a705b0d4a72d827ce21c786a07ffa34fd435e7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62201052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0595ef142788d71e1a292eb5218ea1210fed728d11f6c7c3debb0048829946f2. 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/QMDA62201063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582509871969cc12818c6105d31fec70825778b4f4b32b839eca1ea558d2ebcb. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QMDA62200992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b7f6c8fdc53fc2887c310d61e280c3dfe72a00986a29f32880ab17662319f2. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZDA52230290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12b3caf43e29c8d03ba4817ff3eedceba3ff10341bf5f38c014cd9a0c42de9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QMBZ92257350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db005f5a07e73694e745a84c264fe23f8de0443b7a9eff7495922a51671dcd0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMDA62201051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92223e062fbaefbc6271fcafda77842648915a360189b29115221c657f9e228e. 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/QZTBA2206773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22e1634caf23ece500bed084c6366272873ee9686c2a3608190fc19d660f22c. 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/QZNWU2293500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319daaf652f9e7d515ddfaf08760316fbb8331bd1b41db738a38859b169d0f5f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAZ2227660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f1927c7c8f5c2de10cf9f323172ad28a319ecca416d3a2febce2b84e1ad80c. 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/QZTBA2206775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecdc5e7a8cd90ed2517a3b481c9dd1b6ac1a7c2d3879265cf042a7b430a377d. 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/QZTBA2206776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd100d7b2c0b28f863016f82cf255ce9bd24e17b2a290f07bc0006e949adf878f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ESA012221199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08711f7f82a7a467f543285f67a487d420b40b3b89d218351977a4a6817dc44b. 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/QZHNB2239204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbdf7c89497e8ba0e94d8d49dc215e311494fedba656688c7763205bb078b5d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNB2239205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df5146510af4db335ab0cdf921e99a947b8fd0b2dacd9f71448d753d1c32eb5. 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/QZHNB2239206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e567f37797246420018ee357b44c8b24aab13befb02e3db5106e7e325cf9cfc. 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/QZHNB2239207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ca371aece14946fb180368eaaf6bd462651ba2b9043338c86e51e2e3b0d10b. 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/QZHN72281476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036830cbde80d2b2b64f4e96983515f285d69c37a78cf9ee92d58227a246bf87. 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/QZHNB2239208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d917a58ac2272d86f9cbc892048661e75efc9edf55bb36a339c740500afab. 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/QZHNB2239209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f9555c7bd45412ca4c0d71c606141b6964754fc1f560597a8133e2ab9bf27c. 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/QZHN42244485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3259f9658a400271e054b738f0a7f06b3926ff54f51f3b06c5e7b9ab09db49. 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/QZHNB2239210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc506ae201f8df869445cbc9f3867f41cf91d7f90020cf23a8639d8e666a5207c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNB2239211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1672ef4ca0648a0578d85391bacb5f5996878f7bdeb17fb7f740d4819065b7. 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/QZHNB2239212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e810a8230c70db77ca58f508c3f2cce646847ec7a218c37124b1e2e5c20d810. 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/QZHNB2239213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14f3d35e125ff41efe73448dc21a549767da7c0dadd7091798e379d8341defc. 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/QZHNB2239214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b44fb0e0f75a1dc5b6fe1563a6e61fece6f0d9777184c984c9b24a1c78d7b. 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/ESA092206139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86debc6c45f0bbb3372c90e92d1c5e4faa91c5354264ddd08b556be5f630c4f9. 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/QZK6F2206389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e3232edca9f0dfc9db72ff6d87b0f5dfa275e7f0eae7c84d3f1ac216a2950e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6F2206390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c6647b68f46ac7b127547633780c763166d105075fbafa6c4757bcf8b1cdac. 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/QZK6F2206391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0146820f0ee70b127d980d5869149368bb68b5f4582c1259ee32f2da0faa91. 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/QZK6F2206392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481b7027057e88930c81a828fb36a0e5a903b1cb94b33748454ef246bd6ce41d. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZHNB2204662.