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 0xf4fceaaa361db79b7e84f747499cb467a8abbd23acdcd8eddacb7c0d0c82a6e5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74774ab7-ef5c-4490-ba44-67f9451229e6.json and https://artists.proofprofile.net/proofs/artist/74774ab7-ef5c-4490-ba44-67f9451229e6.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 0xb21b10f24d87858882fa89372556312b3161065f8afdbec0cd6cdadddad92db5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:57:28Z), 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/QZK6P2166286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ab027857ae62f37ed8f34bef2e05630b234f5401211fcfbcf9831554796edb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:14Z), 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/QZK6P2166287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a4f1797ad072931aa8182204ac3191da8b0fe177d9f8064cc755c8d8f219e5. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZK6P2166242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2021c2a36d6784ed24b924884599a61bd8aeb8c49b76bf9ca2acbad8f4a8fae9. 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/QZK6N2116564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9ed4132aa1675d5211133b01ae2ffaef49a68a23569c1bf6f02dcf095d557e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:07:56Z), 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/QZK6N2116566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9044c249b1f08e1947867feab91587a45e072f2f677389975891fb9edfde7ca8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6N2116568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4538c4da4b1dc01fe4b87eb5d24ec96cf4b4ee8e3787285f1ab07a94c8ebfd02. 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/QZK6P2166222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75244be850333760b36e60f122dec1c57dd7a1b3487ea585c11f8e174597defb. 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/QZK6P2168093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fda0926b2c45bceeeb4143d707f3acaf4f4e4608e72b8ffa89ee50ec6309899. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6P2166261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b7e01558ebe8c23e00c3664447aff9aeedd8095b12a6486ffdc98b003d243e. 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/QZK6P2166247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1984de374ad50c7652cbfd8985aefab242078d0eeda709b3be9ca4d7e15bb4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:07Z), 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/QZK6P2166213.