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 0x1c7af7f3191b62603f9d9a08752a0aaee66c821779952330d130d0e07bb7becd. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d97be7f-2998-4478-a6c7-4995b0861896.json and https://artists.proofprofile.net/proofs/artist/4d97be7f-2998-4478-a6c7-4995b0861896.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 0x271e9b6cdc4a951fd6f370ba5ec1ef1861ca4e7ededf502fbac9a4c1f0d68f23. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/CAENV2570286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d207bfca31a8941fad1b4ae1c7e9e49a3d19f6722821914d9606bf7e71dd118. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CALVP2525893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b2058e6989941e63ba5623d29aa926b78d1f2f1cd38e187f5c0379a8c25f22. 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/CALVP2525905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf747007d382cd9f5ba81e880a90f82c94009b580bb02bfbb7de5e96aff11926. 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/CALVP2525922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876653fa38731926d06304fd8da40c75ee39ad8bd2a1c65b5387ab1ef8f13011. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAGOO2582235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d613de66ae94dd263486400e810d56dbfe6b975b756434ad0cf9deec11f4d5. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAGOO2582236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e36c92d31b5a15977ce974db2e97d9f942a3228015f25e19068be22540d1440. 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/CAGOO2582237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546945fe23a3233114748c7b92bb1d5c20671ecf5d54de08070c21024fb0ceff. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAGOO2582238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317f6ba6663fbf2f3267c0e11ac73569101941b877a8cd450d27365b7af18ac9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAGOO2582240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a5a2356566e1449ee59aa16441b96a82120050b1181e632f3c60a67661f1e3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAGOO2582241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8009b729b37bf7066f1bc8c67448e84b5f29fc49deb279850f06c785256f375. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CAGOO2582242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2242deb40232e35a5be956a795fcd30ff4d7420d9cd0f0f5c1b98eed02cb153f. 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/CAGOO2582243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782c3aeb4a61eb098b90a0b087fea868266cd52eb8f60c42835904d0addc7a41. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CAGOO2582244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21589d470e1d33730a3c5f86cc2f061e189f4bf6b4947028e31c7bf74266ff6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAGOO2582246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436938d81724426495c76c3759cc4fab5b6a8e1a001cfe2ccc79b816f79aa508. 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/CAGOO2582247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3275b890ca1c5d086c4d5a29f8df67c7111f8cc64f0ee5a26b45a02adc78147. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAGOO2582250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa91f2637be2394b121ab2b211dd4a617ee2741dac8061b7a6d64c3953d2f76f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CAGOO2582252.