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 0x2dd6ca58ae501a056e0c5d5eb3905a08c53b8747e4db4d6179e8b4de5c2f29c0. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc0f1ed8-699b-4da7-ac68-5b680a9ad574.json and https://artists.proofprofile.net/proofs/artist/dc0f1ed8-699b-4da7-ac68-5b680a9ad574.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 0x4730dc6e88d1020e0b8118cc998bd490e4dec11d83cbddeb188a704cdad18987. 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/CA5KR1950413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3548c47203a7a186c9e83aa94cbb996b952abe997993774dea28ec1e57c597f. 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/CA5KR1950417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59399e8ed50f213b355174a9939b97b1c74c5845f8f82004bb1b28081d87a827. 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/CA5KR1950420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d307a3729ae0bd07e5534f37eb2cfabd98b63298f7e88a22f1dc6a8c8ca070. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:48:44Z), 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/CA5KR1950422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c993dcf15c988218d3e837011d6ed417a5d0149b3a778e58622fc0e19e4040. 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/CA5KR1950423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5173c7fe839d94b5ca6bbb69f1d7218fd7966ad80969d600329c6bedd737136a. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/CA5KR1950666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26531ff42a6493d7290c879d192c339d15baab736a6cda519b032742b72fc6bc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR1950668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0aa465616bf0c4a9fd7285edc51a913c7346b4eb31b21fd6c5b70d414ead86. 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/CA5KR1950672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c9f3c51ca6cd530ab60d3421246877ebecf183061562e2da69f3c20872427a. 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/CA5KR1950676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13790cd00e1a916a9639699476257081f99cc3d54d17b4d25bef70d507df64cc. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:23:18Z), 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/CA5KR1950691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cfc16ce03c1063e2c374a355d03649a25fd4fdd15b0a3ccef61d57c7f492c9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CA5KR1951608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1895021be17c0dccdd14497d99170a4bc519aaaba1fb6b6cd8f4b69627d1257a. 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/CA5KR1951610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1db00f15d0cc7190b7d4bb6e44ea39a25b0373a6052f8fb5633fce7d6da4a9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CA5KR1951614.