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 0xebe1caaf2d605eaa5783074d10fab10ca764dd39cf680f9f1c630a183d2bc613. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6656a26-4b29-486c-bf04-95e87ad304de.json and https://artists.proofprofile.net/proofs/artist/d6656a26-4b29-486c-bf04-95e87ad304de.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 0xf1c8ac7f6a6cefa328d7bbb5674f5e26defa0811a42b95a15472f137e813bad7. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:27:06Z), 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/BC3442400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa98a307f9dbd7f94baa539525f0df2950fc57610ff9f37be148a095424f82c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:47:14Z), 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/BC3442400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d47bc3f67f124a881ce74cb30e76b25818724dc07e329a8d6b5569c2d3f372. 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/BC3442400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3e1bb83eebb5d03c5a2e3d812d03822e5eaa115b7c94375c08ddfeb29f1f35. 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/BC3442400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63937dc90e5f890310c3a0eb184b281f610071c8d7a0b9d04313b8b93c63f06d. 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/BC3442400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45733422e1e0ae4ad4df3207837d534181ed34e3b029b0716c50c0b053c49cf7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:02:04Z), 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/BC3442400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2385dfe19e13affe0c066873feb346ea32a055184149767b298e4d19849c26f6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:11:19Z), 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/BC3442400002.