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 0x22c5e4f2b2f33e520f8aadce5f9a624cff93f989968279dccba44741a090b6a1. 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/a208cfbc-4550-4a6f-ae3a-f6fdf1a2bb87.json and https://artists.proofprofile.net/proofs/artist/a208cfbc-4550-4a6f-ae3a-f6fdf1a2bb87.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 0xd6f7cdcedadc63128ab0dfea375769e11497746e7663b62e3762f1da5a84a055. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/BAA052018214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacbe3051be28a71ba6ca026176fce9a85fa7f1f4a0d26de86412c6844afb029. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BAA052018219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c5509a87c28457db2d98a3f1129c01efece5f8ce028a8d5b2d22f234dad5ac. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BGA671161088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab589ca2a745efbd807b0997de624f23c92032db1ec14a1326cd3b71ee44458. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/BGA671161089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d022b1fafd1e73b4f37378e28664aab1ce8bff9e82e5020cb4c322c5ff53c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BGA671162101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c2ee336bdebed75209ebef364afe05e2041419c75fbc4ea1c4b04de68e50d. 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/BGA671162103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04cb07e98c69f1c1e50a9fe339135c832bbb3a9967b1395d387cc65247025b0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BGA671162104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad6648cd5a0fd12d93eac7d1ad8d73139cc917daf7cfd958a7a7f1ff67f270. 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/BGA671162105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57ec7be6ac9f278cc8c702a74189cbe35bba894f3c08e7c0a79984a43f5b869. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BAA052549729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edf22c44bed1a8745ddcd5a3f9015af3a03c9c2355118dc79e6cfa40b3ffe34. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BAA052549730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc185753509f5f0183bee946dca4f26fba400f208fa331c3ead8b2731df3eeed6. 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/RSA181343152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5966132fcc667a79875f2676718890955dd502777e88a82cd73f7772a373af. 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/RSA181343139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1a782a616645d80744ab77cdfce9be1494c4c23c7c5f044c3b3479df597c85. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RSA181343145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13647d9c5c4886c1064c7dce95668b851cc861ff52cba076ec6930988fb326e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RSA181343147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a25dc7240a5b64247b3d5f5733ef86c2f4f5ee9ca7122e8f8b5fc239068b8a. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:19Z), 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/RSA181343149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4c9769672c56a48a7bbee01d6c958c455726e429c3240660626999b895633b. 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/RSA181343151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96df1be265cfcc0b98ab3073558c9581609d982d28876eac3057a66ef84737b8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BAA052231933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb6cb699a2df0e3716c46a5776d259477fa19aef0b08c6fe25d1d06e2470e88. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:44:38Z), 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/DEKB72514641.