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 0x9d2a0a97a074dc608f4e9f6a5120ae263e0fda221ea8b827f4f09c8be5b775e7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce2ac421-5962-418e-9d98-a65d66fe22ee.json and https://artists.proofprofile.net/proofs/artist/ce2ac421-5962-418e-9d98-a65d66fe22ee.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 0xcb2bdd008a6a8836cd32b611cf19e0d26a3dc5b62086ea58cfe1a0d1f402cecf. 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/GBKQU2362046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11bad5ca15a84c65dfe245941efc7e58a7c32814e5170bafe78154f7bb82446. 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/CA6D22100789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555ba5f2df86cfb9c6acaed2d06707f336c955d68f407063be8e51fdfcc7e273. 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/CA6D22100790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8dda326d02d9d12ca3c6bc928e542e287fa3c4812ff0bee6ccb35cf6b788be. 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/GBKQU2431539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ec48f3b5d941d0d8a41e3ed9617094c7036011df5eb1f0e8cb7e0de4804405. 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/GBKQU2431540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb78aca71827ac645e7f2483249b3d3fd36896f95bc8c9b9796dd5b117d5ecc. 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/GBKQU2431542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725ff4295b8dea133065a2a88b4dd0dfa696a9bce4b5e319c50ec743b93ca013. 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/CA6D22400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4c0d1f06772425ed0dbd0ee81d9d2055bc2633c468ad7e010ddb55d6d6a97c. 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/USA2P2400384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd778b5637cdd67b47b04138e2650dd860c21f8f1d117d0f3522b8a4e56fbc18d. 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/USA2P2400385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee72f5435abd114361a105a6530244f2c1f9a774156fce7114454abb256e960. 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/NLT2H2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0291c8bca19174eec3f81b79a0d482e5bbff4591003b7aefd47456707835567f. 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/NLD682303420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb6b179d06ec0dd6dc5d5f6bc9fbf841de21dced4bb7852c14a6e23e05b9124. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:28:08Z), 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/CH3132317690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ee5d59ba5a11a11ae53e94654d90430b2f36a4a321d4e70b657e7c7fee237b. 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/CH3132317691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd2949ce05258256be7f7ef84a2360933e9251b639f990177220690e62fee6. 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/CA6D22300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeed977948ebe7a9276a47673715d66c4a094b921c949967e806bb5ba8eb4aba. 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/CA6D22200528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aaeb76d6018ffaa46e7aa5fb1789968c91144bd1ebf4c0288cb9bd98552126. 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/NLT2H2200586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15251d9d196385f3adad17548b6a569c7865cb3f3eb0fb40ac167c1307d62a40. 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/CA6D22200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7d07e3f51d406dffe607acabde154f0246e0dd46caf7826e6f07ac5c69811. 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/NLT2H2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d75f75dc090090fe16b2a27e69668d58128af6626c87524b2a65c6102110c5. 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/CA6D22100884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3124d8758e42e3b2f1e250442f85ad5531a19bb074846699f5566ccac1c6fbc0. 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/CA6D22100885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed14d4b8d0f4925ed4a2c587f10e2b12fbe2846fdc0854c2d31fe28dfcbf5a2. 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/CA6D22100886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149efa6a0eb51de2e3c21c694b5607f62224c8488b72c18c65556b82d5ba39cc. 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/CA6D22100887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bc2a149c3a22104e5e89f5cdb3c5b55cb0d42f93886054c602e6c0767b6365. 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/NLE712100794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ee52b885cf1227df3c2cc33fc6a0887efa5cef8228279bf0254032ea2eae2f. 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/CA6D22100630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8c7bd96c6f6e530e48e5e74f6c2b2c13d1770d8d1721e66b3cfc4c55a87221. 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/CA6D22100633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f892f4d4a461733992a1ececf1f9a7fa68ae37de3d607511d2a85c5e000909b. 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/CA6D22100634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1c182031ebce81525cc6713af13fa232bcb11123dd38b13272d459968d3ac4. 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/NLD682101219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17eecdb96256680a46b6dec0699edd23874b05f6fbb49f1fb1fadf099a0a37ac. 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/NLD682101220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3850731895d30ca0a88eb76c1995632ea8537e28dd3194dfea1fb23df9f42845. 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/NLD682101285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2943992df22e37511a69f501df369a89bac805edb88ac6f2cdd301b2c78c2735. 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/CA6D22100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bef2aeac55f1c433481b00a22a84f9dd354d07f4f63cafeb8900ae9f03771a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CA6D22100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9eafbebe6a1f13d2dd776840ec3d0ec1cefee152e473f79367052c2530880c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CH3131915590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfe393714ff6430dd408d418ca30de11c2046d44e95ece6dd48d2eaf4a23633. 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/CH3131915591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400ee60eb4c5f8357439e140c53f8c18c51b338583df61d85ceca387d4606467. 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/CH3131915592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bd80c1c9f567f4b13fb8982b37cdcd2bd53758120474e3dba85018be427765. 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/CH3131915595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296d45b1c012e68fae6bbf37a7d90d4b33e3df80d0cab3113ac461e322aa673f. 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/QZFZ72095280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779dbedf48ea67907fe82e3cf20302e13b8e71b848df6aa65d0d50a5dc58831d. 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/QZFZ32081512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779dbedf48ea67907fe82e3cf20302e13b8e71b848df6aa65d0d50a5dc58831d. 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/QZFZ32081512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b09feaa50da05e99e9e266d7d69a2b9fcf41f3cec6a83c5ff1b6aa03f07af5. 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/US83Z1922725.