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 0x9e63a651c4f7ece56b3f2f635a07c8070f9fc01c190b04b9794bfaf128eda945. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86829f45-56ab-44fb-8c5c-c70f5500ac79.json and https://artists.proofprofile.net/proofs/artist/86829f45-56ab-44fb-8c5c-c70f5500ac79.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 0xdc04baa6139caf629317fd2e9ff3923424176af47ffa7b2d1d29b54ce69937ea. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR0Z50085954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0f04c8e6712817f12a4396e0fe4a2b9a3cb1bbbff775f93bdfeae6aa6b27bc. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:03:31Z), 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/FR0Z50101519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f05fb8aa6192923686508d6ed6c0c42bf1225d8c7de65f4fdeb0e08be142cd2. 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/QZWFF2302323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98aa11db6bc267514039dec4ba5e04ba54cfec00f0cd27eaf1c9342c1c75892. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6J2458821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28f61a282cf18c813d4c360422f57ef90652b746327b111a873d4ec690b06fa. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:27Z), 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/QZTAX2482120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980149545d55f6d9c7a49b7af548cb52128d7a7aeccd4686d7b7e27717495909. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB22493694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa529d88692b215d78e6d7d4d00ab968424d11a24165c12cf4155dd43633d1f3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFF2493414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9168ac17a378a8c594a4321168520b68320efea8f616e80e805b2f53d6871060. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFP2431932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75174f617d421b7c103adee673f39269222938d024c63449d8ff16a2c23fed00. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QT3EX2486771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e69d9fac582e9b8fbe3e0b2df9b2211832e52df2cca1f24aad58ccd52d294b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:34:42Z), 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/QZFZ42559668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338c73998407a74f4cd7841b004f3c431fcfab0cd9f7a87742c5263c426dd5da. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:08Z), 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/CAHQJ2566719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9454b983e0482bd69e30ed6e22fb3f99c6fc1f84d4e53b8e541b5127b840dab1. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZES62544087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74080faaa875be371a1a37babe238bd1b86f5dde47f593027e16aa8a72886a8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6L2585843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf571faf4d8807d9d37ac3099e11cb38997431d513a446bc82633a9ff2290a35. 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/QZPLR2574458.