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 0xa41861416c89b71f82d08f239284f5d24a3d5c00c4dda2ed752beb671514689b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1ade73c-0a21-4d78-b6cb-665319557953.json and https://artists.proofprofile.net/proofs/artist/d1ade73c-0a21-4d78-b6cb-665319557953.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 0x1503e167fe4373809c22b91a39e2528547bdc793a0ecd7d1256743cd309380df. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJZ2532431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7589528456bb0cd53c715980450e2cb271ca9fa73d2a7ce45e4389615b5560b6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJZ2532430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd661d64ff4a9ddebc5ccc091478c614c2e1d9f70faf4278d2dd605c7e8e8501d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:33Z), 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/QZNJZ2532429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b02fa6079fc09dbca3d854cde47cd5e216ed8a3e27226d2ae75811913f7e3b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJZ2532425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82389e477c6f1561ab3745685907c1c6eb647285fa50a773f7941f994c86279f. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZNJZ2532428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff616c67e16a813bd195765f3101e83564e999a6d2deee219afd1f874784eaa. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:50Z), 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/QZNJZ2532427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c154577bf3ef9058ecb410de4f456ac2d0d71b05c8f7ca0173c581d46bf440. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:48:53Z), 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/QZNJZ2532426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50618a3c8d443adc96ef10915e9d0582ec8275ce0f170729f5beae06a6fd7f3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:12:03Z), 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/QZNJZ2532424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad2200e04c3239f41cab19b3e8254dcdf0f5420dd02c032410ee4aac26377ee. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJZ2533046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa0d25d210f549bf9cce00b6b8e49bc2ea465d17056a8183bca23335be9cc78. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJZ2532423.