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 0x132fc5402cba6284df305a249df0d45e0448a1dc921b9515e01839c3a95da77e. 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/a1fb9641-4a21-4687-a03d-e4c216cbeaf1.json and https://artists.proofprofile.net/proofs/artist/a1fb9641-4a21-4687-a03d-e4c216cbeaf1.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 0x6f81422094e4cc384c174ac5dba9adda4f167c759043bff1e12360b4565216fc. 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/SE4RG1914906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe159bdb2cf4e85ea0ef2416b78b014bc928798bc8a845f1e401a81486c1d035d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SE4RG2042110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe935e9ca9c9486a5b6e1425356bb224c5cb397754b0bd97ee29a6c083faf7278. 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/SE4RG2085009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fecebe143139cd13dc86849757f501e16c3d8e274a5ec504b0f4d5fd6425ae. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SE4RG2085012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baabbd000a4f75135d70e86c357562f2f7bf9c443aa67bb01bd4f6bd3d9a492. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:02:21Z), 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/SE6RB2016102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906e3692ebb7fce04f93e870a668a061a61a56566a4af2764a5b6bc58f25dede. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6RB2016103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc892a8d4eda659f221338a9ee122e572a46b5b91b85674c5da79d2e0603c0b73. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/SE6RB2016104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d5fde985e066a0363dcc8ea5e15bfc617690d176cd94ba0166275654b87900. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/SE6RB2016107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b172ec201abc0d470ad64bdac014f99e00daa1d905ad484b572a1a926e20f. 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/SE6RB2016109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf8e93bf7ae7f0d0a227c1144400586dfa16f9f5695a97aec3909bf43ca28d2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE4RG2143704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b58544f2ffe1a60720bfe293c1bc43382f1917889184bc0d1cebb47512a682. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE4RG2143706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe425fe6975611b03febddd716f674ce7626b5ca352c99ea8545298e1d093d0a7. 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/SE4RG2143708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f56cc9e5273feaf15bfe4e6a0628aa43db26eaec9c4e7ea2161a0acd7e9dbca. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE4RG2143709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7159aa7ee8e5c3609ac99fbaf6c4bb12ddb99738200ec08f3527a14dc599bc14. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE4RG2143710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cede3dcac7807b706adac336537bdf486173972319288cb08381862542455b0. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:03Z), 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/SE4RG2143712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa02353d7ce883098352787285eabe56d7f20f1c3fe1960d8c58190705042bd6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SE6RB2201300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb62ab8c5dc8e3089e67ba9624fcadb137444a1364e33520c467e83548131c3. 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/SE6RB2201294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749f23416788e67f2a7e433dcaf731fc07589f34da173952077350a9eabbc2da. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:10:24Z), 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/SE6RB2201298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ad97fab31125c7f18499ca2a192abe7dbb27f119a57feccf5c068c530cef40. 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/SE6RB2201302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d289ca74465a13566fb83e8e8e38ec39a20a1c1d138eecce4ec7004135388d4. 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/SE4RG2500748.