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 0x52675cf9930a57e1687bfcf36b9cc4196fb8f3a94734825ef15744785016a4dc. 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/bf3e6cf0-3eb4-4bcd-bb6b-5c4188cf200f.json and https://artists.proofprofile.net/proofs/artist/bf3e6cf0-3eb4-4bcd-bb6b-5c4188cf200f.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 0x040453f3b8340b7f54394103bf7715b1b707316b8315c57c566d7c1be7e41a1a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GB6TW2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33847e1a62adba713eb09e80a67b605992184b8909e64d1f9f086ec3674cdf27. 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/GB6TW2300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26320c9b97a085fa6baddfc030553c5b345b46064590a99d3f43fe1780557bb5. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GB6TW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a09130373711039eeafa9ddd28053caf1135a522bee5af221c4ad965df6faa1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB6TW2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c596005425c417bc80d78216f8b5e71f3084c7a2153aec41a5edd4f5a4352a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:10:00Z), 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/GB6TW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26320c9b97a085fa6baddfc030553c5b345b46064590a99d3f43fe1780557bb5. 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/GB6TW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c596005425c417bc80d78216f8b5e71f3084c7a2153aec41a5edd4f5a4352a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB6TW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040453f3b8340b7f54394103bf7715b1b707316b8315c57c566d7c1be7e41a1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB6TW2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33847e1a62adba713eb09e80a67b605992184b8909e64d1f9f086ec3674cdf27. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB6TW2300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33847e1a62adba713eb09e80a67b605992184b8909e64d1f9f086ec3674cdf27. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB6TW2300397.
In the distance, where it doesn't matter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1872705a57281d87200120143e680e141cf44e3fe4e9e17d5e20354982ef0dac. 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/QZTB62247376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa33af8642cf8a779318f2de8edbd0273e5b706314a98408733a2bf7eea49642. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ22317979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf32e940bedf08400881f64d20b31f3ad578869aa852b991d9a61177f672f73c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ22317980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0378ef71e0399eb99ea79e3db0e0abda5056d897b860b301c63d23aee59e31d9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:07Z), 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/QZTAY2238080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3704d4b615733224f3af216d26288e916af74ec95d1b1dbfde31faaf4d04850e. 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/UK5EV2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9091ccdd9429ba87f814f5c494701a26174b3fcb487f5d5f8bc99f95c8faf587. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB6TW2400266.