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 0xb0fb35c0eec6335482a6837ca4a1681d1179989158ab8533bd96f7d694d520f4. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b41e87ce-ae82-46df-b920-cc16770ae10c.json and https://artists.proofprofile.net/proofs/artist/b41e87ce-ae82-46df-b920-cc16770ae10c.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 0x57e12785ddb037dc49d51b34c622e2f4184f2554cb0ae2351c89d9bd4b6ecc8d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBQJY1301216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb5f495d27c8b9c73d81b80e80f183240b4f6ae6582b8d40b1037fc9fe8c416. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:39:53Z), 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/FR6V81887777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6880fa00ff177295c934ae514fbb62b1ded0761c475e58a1e70e02c3d3854d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2066205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eebd84595f81d9b8abdcc9d9c0d89adf1d609fb1315c6a0222e7bf2744a268. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CA5KR0022076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb347c6ff89227dc09c75269a061c8714bb24a6c45de2b855ed13ed68bd1c24f8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CA5KR2448193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42fdba0cb5dc9b89caf861ee0c2c81ff9b7b696f1ca4f246e0781d4e9e45d6c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:55Z), 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/CA5KR2478350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8647c79978aa2c7973dd1022eaaf6a3e3ef4bf33cbfc45f6e2ff77ba437e66c5. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/CA5KR2501784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0473c4718ea82efc5cde2650a4165746c31de3be88e3c0ed4b6628cfade8845. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2520078.