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 0x68c97812386776b4978c1bd845612aa2a064b7d0bda5b79e16241608608c3ad2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f47fa6bb-40c0-4a38-b2be-2421b2515697.json and https://artists.proofprofile.net/proofs/artist/f47fa6bb-40c0-4a38-b2be-2421b2515697.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 0x4f31c6d4f308409a9e97b0c1514af723cf00a5c87fc41e47325e8ea7ad191bab. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:01:02Z), 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/GBKQU2364735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a49ecc631e12d1e131809a783fe4abbaadf44afa4dd666357984caa8fca891. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBKQU2364736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b7a6fe64d6baec3afb5c81d38503e593dfb43b8b9d3ead499de27c26d504d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU2364737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ed723d9c62962a8aeef79a5d916b71389f789150c9ea9cf388716836bbbf0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:03:08Z), 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/GBKQU2364738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98af28dca90acb1a33b5a75f385a10f3e77c63ad33085f61252b3c467993f3f4. 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/GBKQU2364739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13556afcca5df8c10e5348b7b447c35495ef910d76a3ec1e35f60a17719fba00. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU2364740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71eaf53e164227c8e232605b1fcfe507a3ac2e9d89bbb8482ab1a23aa46c4e6. 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/GBKQU2364741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841ec2e86e8308ab6e79e777db3c7a612ac177973205064929943ca2cc31ce44. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU2364742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf5af29851c3bb74c4d89e968a5cbb3ddd635dcb909ba6dab3fd1bd26ce737d. 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/GBKQU2364743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac9f6060eb1dc741de0c1193ee39d535b006323654fc7c139bab48f995931a3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:07Z), 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/GBKQU2364745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379c1431a58bdc382db8a1aeb3c1aefbf0434bf0f0a82b307308527e7d946cca. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKQU2364746.