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 0x039b15da5cf63f79f8be438e85f5c6ceeca150ce2c351d9bc63932e6817a64d9. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23bd6550-52ff-4bf8-9a1c-edd49ba73d32.json and https://artists.proofprofile.net/proofs/artist/23bd6550-52ff-4bf8-9a1c-edd49ba73d32.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 0xbe4ca0857a9d5c955702ead105b6bc9fcd5ffed8ef421556ccca68ca0812f07d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGJ2426730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddc108831bf80e80a015819113b979e7e043248f0eee029c06cfafadb885916. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY42445846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553006c545a1f7b9881f39845e6b08728b11b7c4324336a9d440469586d63502. 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/USHM92427298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490a7b62973eacf9a10aacca3e4da7e634400c6b69dfd28be7948e4e3f8bd6a3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:50Z), 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/USCGH2589037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577124f54cd32339d6ff799cd46de95f49a2200467b3662b7a9155f00ad11a88. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGH2589038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3128225e7b4884382c442a354ddb40f3929a61a2357cf23516902a23d3692e6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH2589039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5984ece21f29f8f71cdfd47bf4e9c5539645225e4dca521db18967b6f8738521. 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/USCGH2589041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5d0a3982088cc97c57399a74df3fee51b0f570fd70dbbc2db73b6e14e06c60. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH2589042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788f5c7179224751e3a27b3f8569c08ae8ba5690b987f86b5c2219d11f04bd40. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:10Z), 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/USCGH2589044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044b357b66af0c065909c1ecc81cad080de478cac026584677b164ab90be451e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGH2589045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcc4739099a08608d0f7900b467e8c95e26c6f05226d00bd59b4553256e4e32. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:32:13Z), 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/USCGH2589046.