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 0x53ed4f690829fd9e6b15f38ee606c9c9552926a63b5c6715b0a02dc78c61fcff. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5054247-cc7f-4137-b93f-92e727bed2d6.json and https://artists.proofprofile.net/proofs/artist/c5054247-cc7f-4137-b93f-92e727bed2d6.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 0xb4040e9420c53af5de04e5aaed69bae122d1773ab559c06effda66ffebcf311d. 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/ARF249300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047be7fa3903eadd3f0d36bd90d84ca715d5afc33aa8023d7d08d955c7134054. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARF249300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebee0fb323a1fd7d7edd8713b8c8e991e62473807975f594a3a41225e227a992. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ARF249300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4989812e1c36df9fb61660e09ac6f37b2c76e171796ab3aa3009c6327ecf5ecb. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/ARF249300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7803d23a950409e107dcc1f6f7864b49fd9d0e68c785a606624dd65a30948e36. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ARF249300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579980662bf06cd5fdd9bc158ae57feb1f496e2cefd7934d3e96e9d5246c330. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ARF249300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4984527f3a5175afa390cba06869320c9bcabd4e736b4e588f78beb84b6c4050. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:58Z), 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/ARF249300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbe3a72c07ace3ddbb14087a2a32c9567b3c65e1da967c2424e574386d1e12. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ARF249300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821b7f4f7c05017dfef68270ac0b288e7d3ba3f1ff4e3ce806dc75ddf2790ca3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AR8L71800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aca06daa12ba830926aa2a40fdbf72093dbe1f8255213129fea595bc4777155. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AR8L71800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8460bd7e37e29a5fe859dcb7bbda70f76ee25a52acf70a8c39e984e00057884. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AR8L71800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5439863671eba3fcf6953041aca49d34e8214482595259a0b2f60a2deb3d6c1c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:37:04Z), 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/AR8L71800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03b17df334035f334e19a09f2187f3886dea2cb12e7550a10dd503ff00fe118. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:22Z), 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/AR8L71800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40306d13038f48c7460abbb7a3f1c24ae4c8da1f8bf7793fc1504e6c6714ee58. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AR8L71800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc00a7bee327da005f72f7fa501df9b1187ff6aeb2d9ed231239a5b1c7f2af3. 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/AR8L71800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a9db864954fb79bb5bae45e4aba72ab6a381ba9782ac50cc4e7c26be4444ed. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/AR8L71800070.