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 0x24315ff2261d2dcf7da8ab9a998c3efabd44e6f2f89090336ba1cf718c464dab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/531d69a9-319d-4932-b7a1-47117f837efe.json and https://artists.proofprofile.net/proofs/artist/531d69a9-319d-4932-b7a1-47117f837efe.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 0xbd08a7f0d3dafbbcb50ca77c63829ede466ef52b9854e77049e96166a7bcd4f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAU212000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffefe4545740724000ad640b303446ec573575bfd62697069fac1ab10c9707a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CAU212000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108d06012d37a9f4acf955d39a887c1065a0795566309d5b5eac4f0bce5b9579. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAU212000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43dd9a23ea01ac8fbb88e01ea64bf4b173a78a56bc30a72fa39e812bac77b58. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/CAU212000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c65f6aeb9a00d0c95b2ba56b2fe178902858230ff82cd88dd6e698ba87cef62. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:26Z), 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/CAU212000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a9d9cd9ea672729dd1ce90c5f12c46c35f5c7be51e3f6937774b0ed5a4b03. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:57Z), 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/QMPKX1717739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c641704a9eddcd414326296082143c3f745941461b6791b11f57f92820b19b1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM24S1839245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd26b42f398f7b4a83df9cf35a2455e6c95adc7632e27c20eec38bf7fd765de. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:15Z), 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/QM6P42096110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6931020efeac79b9d7e72b40dfe06ced1b1cb8a29aad467e44766d072f898a77. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZES62448542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf684d735716366ffee7b56efe0509bffbaab86d89668e92bda34ecf17c2ffcf1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMEN2498069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa166d3c791f960f2d3ec0cfd2f93c5f0102e8665a4158bddf49a70c5e29413d4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB62434221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4752880a75dcd105964efe8ea89c18679be88199040e4aaf563950c48efba2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTGW2405896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31f0fe1da77e5fb824a34f72bd9390ebe694a2056671ef791288b92bdba22d6. 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/CA5KR1839343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0877c48981f46afd0f8d985c375df74264af37ceec70cf32403605231ff9e500. 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/USA2P1551604.