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 0x8a7989f4ebd2995c8a7436ca3c81445024f21691da767c11b781d06961b8bce8. 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/eff90ec6-f52d-4da7-8b39-720861d59e7f.json and https://artists.proofprofile.net/proofs/artist/eff90ec6-f52d-4da7-8b39-720861d59e7f.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 0x4f212e2e4f692c7346e6b38af818f153b084f23015ada9d073c4e148bfafe0cd. 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/US83Z2120936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e5eacc566aa3e7432e836070bc3201e49c17e877f8dd2ea268badf1744a154. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/US83Z2120937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa385c3735254765cbd98719d87dfb7b69186da3802a6cae59309d088c141053c. 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/US83Z2120939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2e5333639fd4df8ba0444e3e0ce5c4817a582cf3bbd4ec29a3ee6e6cb0df9f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/US83Z2120940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b395821d68d1b72d0050af62cd044ec9cec8b586cc546f6ee5087fc4be08de. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEH741918228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2a4f0e9463046b6c37f76426c2dcdfc2c444b7698b9db0117439908f319255. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US83Z2120943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2774fcb3c8cbec3e87074dfa706b0cc767d91a2b4ac973a38e3d23b2d49654. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEH741918278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a54bbe2fe45cbdc4619529dba54beec092e52cf6b6976a49102463f6d6f4b7f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2121138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9af8ff313502c05d02a1ff2a388e048411d33dece029a8693b3eb5aa85dc121. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US83Z2121143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67296416353f700f8206c0f70c62b57da85ac3c36211d343e701fc37502c6c9b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:48:16Z), 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/US83Z2121148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7182194b79b020de7f3d4bbd8993c6b988ccef2ae481b8927a0113f3b69fa0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US83Z2143280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7208cdb3a073336634a5e96dafc19564bf8e6d6a6da189526c8c89b2e7ac3b5. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBKQU2231099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc72a442ec357f5c7eeee38a1f56382f4357d9aa037a1a5a4ec74ffc3b4c8d11. 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/US83Z2471602.