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 0xf0475ea704f2806138e88e3c8b6b7493dacf83b4fdbadad8ebe75ada10bc0a5f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98c95301-d78b-43f9-8e31-60f13931d313.json and https://artists.proofprofile.net/proofs/artist/98c95301-d78b-43f9-8e31-60f13931d313.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 0x7aa4db5d3e2353971af7c9efd8fba5f4070cdc34e884bc8c20b3b95528142ee4. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USLD91730600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6868dd5e309e37d37ef8bb1498f05cd2a68c0080982f42155390f8c4506771ee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAQOI2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64d438b52c0c23ea6ea51a444db0a907ff1fa712de1b2702210446548b2513e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:03:27Z), 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/CAQOI2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb3291acc1237652ba509eb180ced3f560a78210bf8b0a877529b3525942fcf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAQOI2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728440a685183e968ec35710227314496b4af1d2379b54afa20a9f302ae08086. 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/CAQOI2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a63f62a8f2ff7b56d9a79655a936f42b6b9ac1558fcbd11dae0f044c488e37f. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:58:33Z), 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/CAQOI2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3caadc9a67681291da6ce8905d3c7e4b1c89b228e95dbe2f35cfd8185ed68e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:09:46Z), 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/QZMHN2276932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56dd836e0715b0f933ac3e03f6b68d67130b5b2b9fc743026bbb80bb0e1a649. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:29:56Z), 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/GX8KD2270925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138f86b9c54067fa8f8aef78ff5ae8ffeb046c74833e421246a568a8a38a4ff2. 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/CAQOI2301875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87691b9a3c690a563f3ff0eeea57ae09fc4c7a965dec12293921da3c117baa2b. 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/CAQOI2301876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a72c931b5a03e64dfe0c9ed35bcf8d9be104ec715e388163e40474542f0c87c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAQOI2303015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97232c8198113b6905670d03b3da82c37ea83b762e38a6acaddc2258988c9e50. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLV62306314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0336eee1bbe511abd76ffee8bca99cc0822f5abafbd2589a309a5fe899215446. 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/CACWV2498147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333e24305d98415c43f200f5d55afea509137c971b883c477a58e95b2f3c509b. 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/FRR642101031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81267ed3693dd620a929c5776d127238a5d80314a2bc6659712f0ddfea6be5a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM4TX2449669.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5de1afe2013bbb473bfe73bf5ec9fccd29af4533e80cb3ca2407a2bc5b6b51. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM5LC2200156.