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 0x41943a779fba307568220d490f610340624a07b3608b43f417e2cc596d556f8d. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4cd6a40-f8c3-46bf-9017-eddbfdbb4ea7.json and https://artists.proofprofile.net/proofs/artist/c4cd6a40-f8c3-46bf-9017-eddbfdbb4ea7.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 0xdb09033c8e4687d8eedc47f20dd76f6deea550f1075af4fba2c889bc31f80c40. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/GBMA22466218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee101eab73bc7008fe348091d1199051bca59ea1b211e1adcb0e66630b83e8d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBMA22466219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0c3d7cf1ce8ef7fefa0664a5c0e986fd89f61a2f29d4ccf09b80c4b1ca5dab. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:05:16Z), 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/GBMA22466221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fb5073c79bd49ea9b19a9bd7eefcd1b460b7c1c36339a9e8b1b51650eb7d8b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22466222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a82b4522739494f9bf4daddd84cf32d7a78fa0c3f7a0b82015f442bbbb80201. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:28:43Z), 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/GBMA22466224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0adecaedce94d4ed316edb98f0d7d643d67419397330ff7ce94fdb63cfb265. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:39:51Z), 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/GBMA22466226.