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 0x58cf581244a969f8ca7922bb6a84acd34ea4db66884c2be5617391a8d972d739. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d94c3cd-71bd-4fc2-a640-561edb667837.json and https://artists.proofprofile.net/proofs/artist/5d94c3cd-71bd-4fc2-a640-561edb667837.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 0xe618d1a656e9f522800260643d02ff502c708779ececeb445e149c9f2f48f6ca. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SE5XG2259736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1814d42b7f9f4b8c6e86841e8db84bd6c91a1ccbc78dfcd66540926cc3897720. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZX8H2362612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8968b7a36761ce798e04288fd4b08ed10952a5bbb7b6c325c7f2fa9407732e. 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/SE57V2401063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd74aa889e5c94ec633718f20f9eb76cb88d50b40002924824054d82fae0b973. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE57V2401064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563a5d3d27575896825e9b610d00e9d0c7359c2a4458fa65d977f71cf406f238. 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/SE57V2401065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb35040ff7fd3a3320011aad73012c88de916a1a145c3e09ee40fdb4fa26c994. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/SE57V2401066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf618bbe20d2f8ac4c65d20bc5e10dab03b96e4aafd251ef0982717ef2d556a50. 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/SE57V2401067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2dc8f0fd61aefdbaa91954672a9cb9e6378c8d1b2f6f3560ad40e384c28f5a. 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/SE57V2401068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5933fff3333a36daa7a5c5a9efcd8e78f9540022d10ba4e62c179862597411a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SE57V2401069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2413fe3ff130993b0c02b74e51b3ff61a5bf27ab7b0507d9f5b11ad0b4a49e6a. 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/SE57V2401070.