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 0x34013022d491908730cf24a08cfa04cfef50de01963bec5767865a22094f1f93. 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/9349b29c-1138-40d8-bdc3-1bb118690230.json and https://artists.proofprofile.net/proofs/artist/9349b29c-1138-40d8-bdc3-1bb118690230.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 0xde64ad59886aeb2306459b9da3caa1207551607a8098f83ecacfcfdafaf147b8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:28:45Z), 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/SE5Q51817346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3c10ead2e1def3a85b1c18c6cd88d3c667206911b66101987be743e80ba48b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE5Q51900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab036774f7463f15ac607d4fe848e131c1d08eb8e5274405f2d1b7d2ec6ffa4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5Q51901061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947275abd687217c594ce575fe70b108941abe9af9c3b4f0960964817ba34d4f. 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/SE5Q51902092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e5df2d2440d16e52965a97aec06307d15a89fea5e5ec0b3a28584fc7bc2232. 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/SE5Q51901674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dca49b915ab6186f30c71e3e5a3e510dfa91f2e001fac1ba7ec49fdaa34461. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SE5Q51901935.
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 0x82fdb555a8316247dd888b18b970b5372818df77038d883ace9d7de91c47fa0e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/SE5Q52001820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0924c29f93a5e442846b9cee22eaa8245069d4fce44e188cce4dab8b476ef517. 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/SE5Q52003869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc00a2222e37a269fe7050dcb53c7b2b58219aba26618a3595c2664a90701b2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5Q52103340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d42c8c3e4e0c4370d2e8c5afebbeb2132759db8c60e7b44f7ff99d6d358cbce. 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/SE5Q52103029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548be67f9697d2e8ee4517bb741a3a139553b12a1bf5bb5cf9e0811b67bc80b7. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/SE5Q52101903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8763d31f1d23d75fa0f2cc5d6e96bce0670d432ad352f39621d8851905ce49. 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/SE5Q52101898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc1ea366f2f520db49559d4a666841ef6332dd7714d39541f10467ff7c56112. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:12Z), 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/SE5Q52400211.
Epidemic Presents: Crates (Guile Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62bbd576b8939f0a91d5a6f2590c23b5f5e5b94a2e7f3ce193724759916eecc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5Q51901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd4db8914b0625c3d8bdcb1dc211c89e303403471ccf987d952156e6d107bb5. 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/SE5Q51902093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713b70483071916e10cf436b551e9f70e5897329185fb104a078f4016fe4312f. 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/SE5Q52304873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ab935eb10bf981827644c4283e36ba2011813de7c046e948af771f87db080a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE5Q51901675.