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 0xdf75e0f8745efb7eec5a5ac88d4d232761993165589405b203baaa1433bbaab7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/863eb364-1860-4ec6-bd49-8a12fd00d4eb.json and https://artists.proofprofile.net/proofs/artist/863eb364-1860-4ec6-bd49-8a12fd00d4eb.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 0x620d3dc77bf6130d39f1425b4517b2d78e2cee0e4f140b8f98da0f4ba4ed7f75. 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/QZPEW2568010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ea675c2d5173ecb1469afed32e92a6537eab3c02926eeea1c1126604d17f13. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:36:49Z), 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/UKN492305855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d3dc77bf6130d39f1425b4517b2d78e2cee0e4f140b8f98da0f4ba4ed7f75. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPEW2568010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dc1ad7c7aefa3e6027d11cf8a00befb6bd2600b1a91eaf9f9e7cec88b4025b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:14Z), 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/UKN492402851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dc1ad7c7aefa3e6027d11cf8a00befb6bd2600b1a91eaf9f9e7cec88b4025b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:25Z), 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/UKN492402851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cfcd15488ac82a15267311cc8e10dc3addb09f393c821fd5bb14d778661727. 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/UKN492402852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe9e346a4d6cfd011169a2d9b606b9a6ccf6188e8c36841eb471a61fdc92c8e. 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/UKN492402853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe9e346a4d6cfd011169a2d9b606b9a6ccf6188e8c36841eb471a61fdc92c8e. 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/UKN492402853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c9e313638fea952ebd87dba35c2a40818b9e748f789bea7c9fe7c85668c19f. 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/UKN492402854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cfcd15488ac82a15267311cc8e10dc3addb09f393c821fd5bb14d778661727. 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/UKN492402852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cfcd15488ac82a15267311cc8e10dc3addb09f393c821fd5bb14d778661727. 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/UKN492402852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c9e313638fea952ebd87dba35c2a40818b9e748f789bea7c9fe7c85668c19f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKN492402854.