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 0x6932690e15e9a046c8d7ef9f0697cf3c2363f23bacf34f4b7a790050ddc7c3a2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/930f6c07-500e-4384-b8c2-ae1f7ad3bd66.json and https://artists.proofprofile.net/proofs/artist/930f6c07-500e-4384-b8c2-ae1f7ad3bd66.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 0x78763d922e6a60c41933de28ec0ecb969469fbce7cb1441116954012d82c7391. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:14:13Z), 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/QZHNA2002238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f27fc147489c681b237a17ed8bc1a5277b697adc1f426000146ac70b83968ee. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES72196248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7121f72f17cdec2c4c87e5bbc756389ab3ade0726f9e80c35b0d8b890bdef9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZGXC2200596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dd15dcf61672af119ba3453613b6af1c61c709ef9be247695341280ce5f446. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGXC2300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dd15dcf61672af119ba3453613b6af1c61c709ef9be247695341280ce5f446. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGXC2300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96eef01651a4481cc112314ac15b58f0b689e0ee92a6b9cf2d68f89aab9c0bf. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZGXC2300868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f7791ac5689a6f996bbf92a6007bef2d8007512785b0fd4ad00c91e6f7926. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZGXC2400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeb137f9ab1e59502c008b7d7b3bc7d2912078ebb5c2a7d63a6868ab4c260b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGXC2400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f7791ac5689a6f996bbf92a6007bef2d8007512785b0fd4ad00c91e6f7926. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZGXC2400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeb137f9ab1e59502c008b7d7b3bc7d2912078ebb5c2a7d63a6868ab4c260b1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGXC2400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f7791ac5689a6f996bbf92a6007bef2d8007512785b0fd4ad00c91e6f7926. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZGXC2400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85128f4b030a3e7d711a4f70c84dadc946d48de54f7a9c05aa2b3b39811a287. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGXC2400586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeb137f9ab1e59502c008b7d7b3bc7d2912078ebb5c2a7d63a6868ab4c260b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGXC2400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605f2ca91da05562d0a75c570ee5e9e3869bb13982703dfa8dd3f6bb20fc55d6. 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/QZGXC2400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2bdbdd6e1e99de76e7b5b1d6c93075c2e29deb4055b0d78e444bb43c9c9915. 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/QZGXC2500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2216318bd3c152bfaf83bfbd704b75fdc8fc3685fbd7d774e164d8dc0e9cc9e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGXC2500514.