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 0xa199bc3d4eb1d1bf9a712dd1410dd2233d9a8f4ded232ea8e6ef86cf0f4f2ee8. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ab66ab8-24fb-4c96-a9bb-2621a5c90c7f.json and https://artists.proofprofile.net/proofs/artist/2ab66ab8-24fb-4c96-a9bb-2621a5c90c7f.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 0xa45178daef7de92adaef1cf517088a2b143cd35f888bb5f3d72434618f85f030. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/IDA832500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d2f288d79736c65ee339636a33b811291dca9705a232802742942905c9a16. 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/IDA832500287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9744c095fdf69342b6482cf4938ffb59f48df489947262add1b443604ee6eb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/IDR012509272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43e85b46119df344bd4c8d2ab909a4276ae8bb428c61f54ae1545d626cd3c01. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IDR012509279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9db7528ca4e4d067df88565a041a03de6e2a4fd849eb9dfa59ed21d4c36a173. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/IDR012509512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4b3dc1a861335fe76d8257a9b329571b3f6b8716e62894bb67dd9f13b56c84. 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/IDR012509500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7747668de1bc6a5ba64f71777f102707fc6d788d9f720e64399eff7129ab76ef. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/IDR012509481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96d2ebe9e591e751934b16bde70606dcc6bb310e166452505884036db71d29a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IDR012509482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf956194dc3c3ca004e71e7e51ad1868534176a291e3e37e659b9fa8a5e76c2a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:19:29Z), 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/IDR012509497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c94e2589021ec8bc9eef8f65272671fbacb88636997390d423e53dd72ef1409. 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/IDR012509519.