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 0xe7138c99e3271f30a93bebd07221c66cbedade34f788095ad1d73b222b941beb. 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/6f023bc4-fea7-4ba6-8403-acac30d6e2c9.json and https://artists.proofprofile.net/proofs/artist/6f023bc4-fea7-4ba6-8403-acac30d6e2c9.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 0x32e3644b1f59bad6c21b142fadda692fc0dcead9cac8db5ad72749e1630d9ed1. 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/HUA612202862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0281fe3c445f903950ee464bb458c9f700cfbff7233fae87503075622502647d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HUA612202863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7505bc6154b4a57d390b74934b0787cebb0a19a6b92a6ae8f601852eb18df172. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HUA612202864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f365ff853494e91b6964f995687e19789abeaf7910ccd3919cfd706af1d54d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HUB751301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe21d8af0c8e5152aa8c8140d479dd832770a3f3ea30ad31893d8ee84ff553a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/HUB751301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7535ad5458d237f4cfa2f26511afc935080d43af91311f95d121877db6f9d09. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/HUB751301008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb09681be37565402623ba192a813bdfae828de17ef755f36c9da117b26d64. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HUB751301012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9440bad997292ce98e914df566c5dc9d4b7a00afdd6f008bb95f8bb2bc9b5d1. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/HUA611500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0450969756729b963b81b9ad2464fb1abe4a52d6490caa2b550b7f971ca415. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/HUA611500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362bcd52bfde06d73202900d3d9f954b5b0daff4de43ac2452a05cb18133a8aa. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/HUA611700591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05800fb10e75a4dcc5a8c97abfd85b268d0c13e9c0d2a36afd910f35a04afc4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/HUA611700592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46df3778c71e04543b295e06358fcdb2099ece1253417c6ac813eb6f49f4a0f0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/HUA611700594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcefd59e0fb02317f8e9a3e6c500eba2e8eb6c667d374fb288ea7f49a8db6266. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:05:20Z), 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/HUA611700597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d597402f4a18dd6c08ef1a90e5c89dead72f907a8459a741a2fb1c53289447f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HUA611700600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a992392dc2fc6a8c0b11b25769cf4f70bb87e6b4e4f8cee48bbeaba8fefe3ca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HUA611802379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2849acbf0f278ac1a1e7fa76f434e35dd7b30d52d28761e1618b1986fac37c. 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/HUA612300537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40f30919a1555b21aad4d3160d6d4e597a2795d90af629ce63b9d7642231859. 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/HUA612300540.