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 0x2ca0da29e55680955a69e8727b350657383ec62a4fc974c2c8e2f5961fa08dde. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10d9609e-1f2f-44df-870b-2ad9dfc717bc.json and https://artists.proofprofile.net/proofs/artist/10d9609e-1f2f-44df-870b-2ad9dfc717bc.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 0xd23a0c8b460b1c7a022bdc4024a57b3b929709522cbce4ad4b247dbe69d9ec05. 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/TCADX1849269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046756220d9f780c0c8b53d997a852a47942f9947ae892be7ac8de366c62be23. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:37Z), 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/TCADX1849243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165e2da1e40ea09c636a414f7d96ff51c67fbdff48e9ffb8920a655877077faf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCADX1849233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89647fbe146e005070efabd0bf0a5bf25a097e33330000254fa3f9cb889957ad. 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/TCADX1849235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9769b4da9543d95a8fdd1e532856ebb87e02571d43f81493cbbeee6405298767. 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/TCADX1849251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b29776aa68b6d4032a956543d76872ed54736281320bb75b5e19abe21ca15c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:20:04Z), 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/TCADX1849255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa62fda19094a1f9071b787d32c975d07a6b690829e6416311f50ab1b84e7db. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCADX1849262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9d8dd8b26efe49693e8517048264932ca368bf0aa8f7ade734638d9d129bf2. 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/TCADX1849266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca68017173a132839960ee341085922ab863ca678fe54ed82298027bb0e1a3d4. 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/TCADX1849268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf421be25b586541b3aca98bc1be6c4ee6ff61ae288fa8b9df412efffe3986b78. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCADX1849276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28f2e85538e16eed53ca537c96ba968fbfc96daaa88a8b4443c01ab1c9c3633. 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/TCADX1849286.