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 0x0adec624eca5107a39365c8cf805ccd66cfd700f95620186665df960b3a2b3e7. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a471e7c-6947-4556-ac82-d08d30e2e4fd.json and https://artists.proofprofile.net/proofs/artist/2a471e7c-6947-4556-ac82-d08d30e2e4fd.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 0xabafb445af577d8ef01a3b4c32e332d7bd18b7b908523c9858e25098514c6c90. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM91327181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceea30b2818919ab7375b7e9b33c09d00ee984f46a38c589b6358746c7488f1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM91939207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd824fe99ddd5f750f31b19d216ab9fd7520daee4fe89605d2b05d375427f012a. 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/USHM91939211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7064b6521b1227faa917d02199a9a9a1c1a7322acbfc83fa8d595b1078488579. 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/USHM91939213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7d02cd059e870f27978ac5a092186dfa9906b0a0b65eb0ded12881cbbc1717. 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/USHM91939214.
I've Been Everywhere (German Mennonite Communities)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb675736cecf83d11ce9baee1a5ed9ac1ff50343d946a84a662406e96017123ec. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USHM82183891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd0a5bd8412d3631e4351241910a2d3548f61e27e1cb80303804c85112ae73f. 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/USDY42388669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa015175479b6834902b70a7a5cd21a650cea052b61e7e87f9baf381a8d19258e. 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/USDY42388672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe468a9532c93cc99cc8eb1f0d82a0e691d67863547abba9dc19568aef18d00d2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USDY42388674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96bc09d766a0ce3d861b35fc22d7d99872904405b6fb050661023b54751374c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USDY42388678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b42f26db51eb82c78241f1eca1adcc6bc0278eb01e11b7e57cfe744fba6b6b4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USDY42388679.