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 0xde411918c2ca95531f338490e49e4eeb4a0e64ad7ac4907889ef0f14aa1d54f8. 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/79499800-5478-433c-86fa-4ff29ee32f29.json and https://artists.proofprofile.net/proofs/artist/79499800-5478-433c-86fa-4ff29ee32f29.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 0x029ee404f0d404474de8bce152e249d83306d6bd74dbeb86432549370564c9e8. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBMA22469378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d22247921288971305c289af1826c5061629511a42adb0b6bc1a0e3700d622f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:56:46Z), 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/GBMA22469366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ecb1b3f609e23dd18b6d458dd8593ad5c6ae788a5a90a1ff503a0187c36778. 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/GBMA22469317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf243b05e3aa4812d186d73c47573c563d7224cd4014a67de43c6f914a9ecd546. 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/GBMA22469391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453d7fbc5635b0bf8b21801450065485261c224bad282a1cb222a15cbfdbec3b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBMA22469562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc883fe90a4ac42e58d1e438450b12f46cb93166eaab86580e8a0cfddcb112962. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBMA22469566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7092b5d46f4b89a9bb903b6e2d678a7eb395c990cfae4d3d80479e5839a8c42e. 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/GBMA22471365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26e9ad06ac9492ecf10722aa2eaa28725e47505b079a53795231f9b244466e1. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/GBMA22471427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a9774bc558d71e7002f8e3a9b12921001055894fa70faec96b59788023e448. 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/GBMA22471723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab7e42d77cb852cc1dd5c0e7fdd0798313dff5c1d6becbe9f4af5007c5574b7. 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/GBMA22473839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d25385b7faf2dbb9e0fb63fa91b91033124cbdc2e111304b1e72bc51af57781. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBMA22473830.