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 0x2c104304f0824ea5069c6750361f5fda5fb429c6f27c5b2f02e52bdb7255ebdc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb70a71b-6337-4924-b57d-24433cf7dcc6.json and https://artists.proofprofile.net/proofs/artist/fb70a71b-6337-4924-b57d-24433cf7dcc6.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 0xa333e2b4c38898fe4123dfdaec60c1fcefe0c81098f1c4824d7e61a0d75e8900. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ52157122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9453f61b09990e88c094477c749a9e3029e3d62c42a2239983cf56dfcd1b2843. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZK6Q2174445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398379b6c19db4e63b6e882ddd6100f4f05bb374a3237db6b1de9cbe179bc889. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEM2125341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee985eebfef7181de90fc973c9d7030079bffdc3ccc2662a45d0472531814f3b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ42217519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a22421c730055535c0354c35ab6126c855a2d64550128f685f53ee19e18b38. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:24:45Z), 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/QZFZ72324162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77757f53e99c1f780d6b74958fe77df6e1bb3e92e88111cc6fb368f092d3112. 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/QZFZ72324799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817820de974e74a8747445507e5bf1a612166b74f37eb8ef7d2aad91fa17ffda. 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/QZES52490458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8545a34a63bfdd8ea9841735c3eefa330a88a2dfa095727ee7d7403384307073. 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/QZDA62334169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ac4d697a6dc317e4fc5b9bd6249135d7b80e286a566eda02471ffce8a49fb1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:49:37Z), 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/QZWFJ2442867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf071040ce93c5f3cd9d5a85a530bce210a7cefbe356e0d53467f26eb6904e930. 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/QZDA82387280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c1a980aeb62ee4c08f670bf386f8c9210aad79761d66d33ba52cb8a1dcbda9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:30Z), 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/QZZ7M2404340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fb74ad3d61dd73fb7ff5d7d2afea137998e94fe93a2c7eda54de93f0c328c9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:23:53Z), 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/QZFZ32567048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67445b104f52edb0e0149dfd3c77f2cbd2daa2b29183ed95524767a5eed1ca1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZFZ32567049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaf5b7abd7748cfd59d6c6e2f2f6a13e0c879a536a554f3a94fb2a8da2f136b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPLS2521892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32c8fcc4be8366e4a34242f64f4f740bb2300176625d2e34a88251c398d43f2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:34Z), 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/QZTB72591315.