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 0x844f7ccc7992c89cd2991699fced524595f22b6eda011fe61e2569da52a001ad. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/601c972f-e3b0-4d13-a44d-3e1c4dbe16c1.json and https://artists.proofprofile.net/proofs/artist/601c972f-e3b0-4d13-a44d-3e1c4dbe16c1.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 0x301fd284a47f4b0dd943b0338bba3f9171451f9dd051f7fe5a27e02343802eec. 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/CA5KR1827422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0810a6bd09cc96f36e54eee8ead4361c66ca7a7b9688d33683d385533fecc2. 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/CA5KR1572826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bff30d02d66a4db9145a8196370588851ce8ca4671f55dba6b422d4c84c5bbf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR1553004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0955861c7da73d5637b74eb0a1599efe76e412042f8d25296db5376e0280830. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCACH1513082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e80b2411f1ff17254306594aac8a1ebaf67234516954951855251f0a417620. 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/GB2LD0901681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17f24a22e842a351ac8819c03698cc2cb844c5113a11ff6d5a001f8f021d813. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB2LD0901676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21eaea5a7c61e9a3319a263e9070de7af9488f465874dd56e75511ea5a470a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD0901610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2670ad2cff75e0a93f378b2e537ccb12ac144d4a09ff3877643d341064e2adcd. 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/GB2LD0901602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c68813c6aa63f6a183072190c97cf763a5c8810d8c7fcb0d6f64c061d5f077. 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/GB2LD0901800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e80b2411f1ff17254306594aac8a1ebaf67234516954951855251f0a417620. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GB2LD0901681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6766d154c7c6c0333d4b305b270f7ac36b02f6e534a25e98903bc57c14d1e05a. 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/GB2LD0901664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67177f024b1febac7b2ed99a32c03b849c55da76083c1d4e5462dc654798f74f. 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/GB2LD0901804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e580e0ef041e111fdd9cf9f709797cee4201f650e04d2f28faaf34ab1e813a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB2LD0901603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fcf791bf773528ebd03ea2cc019b886d8e8b484a6a0c7e70b8ebb10cd495a3. 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/GB2LD0901805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e982cc164fca4c427732e59fef8da71f930f0d1e41bc1b084746d23aa0fc5bb. 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/TCACG1559150.