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 0x569f2be4d5e2ec209fcd4c27e026beb3ebcd814f3f96ae97e00b37da9445e139. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cb5ec6a-30dd-4ecd-aaca-204e3df207ef.json and https://artists.proofprofile.net/proofs/artist/4cb5ec6a-30dd-4ecd-aaca-204e3df207ef.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 0x041906c71aa6fbc0a56a932934584493f0125a8500829dd8e7f312f44c39c5f4. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:27Z), 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/CH6542517725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd748be79b94f6c447a0e49e8d66ad1551cc425b7957a52fcfc76d55cc410736a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/CH6542517726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1394350af63fee6d71f3c4f7a3eb61c502c0a599ad13806e4d4bcdcc914de82d. 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/CH6542517727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c18b471697b470a23eefe7d52abccfd53a172767eb53fed5154e7d1928c985f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CH6542517728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece252414329823986f20801abf6eab96de35d8c93020c8124b5729d37eaccff. 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/CH6542517729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcde0c33898f1c0b9f31f411216b1d1a79c1bc60a33e5421af5f280c3b863d1. 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/CH6542517730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192104ad0eff1180d25656d1160a8354fd7064b530d0ae0880abd1a78d911a32. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/CH6542517731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f45659244578ff43c39f78f900043ed1d9f195958b2f9c0d0a03f3102a6d0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:36Z), 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/CH6542517732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e1621c543c62c5d3e90326902e9c14222f1b22698a5762c4633b3618a24bd4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:03Z), 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/CH6542517733.