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 0xca193c35da3c493c5d31278228ab5dfcd00027e0d42102cd9ce850d5b7fc2dde. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1d2fcc4-0e8a-4bbf-8722-74b01f650000.json and https://artists.proofprofile.net/proofs/artist/e1d2fcc4-0e8a-4bbf-8722-74b01f650000.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 0xc769e78ed2af39828a6e839584e0a0252e41a607ae81b7ff2780305983e99cf1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:49Z), 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/QZWFW2410981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa376befab63d78470597c9a9bebeb521c5d25f524ac784807bb36b4cb5099529. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA72585216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2860d8f46936a3a1ff08d2874f705918eb25a69122e680f2a0ef33aa20e8d181. 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/QZHN92512892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0973f3ed86c264f860f8bcaac990bedc7aeee25a2fb7e8178bf628dddffca. 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/QZK6N2574829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbb07fef9396bf16c984604e464bef70a4adee6098c8e30b105b38a435340f8. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6N2564076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548bdecc7e1c8fd07577ae43a88fd4a5061b27306b5fce8a42b7cbf0257932d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6H2550742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37385c3ac704675f99af159172a6396d7e72d69fcf104ccd3f1b4ca61214ecf9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEP2551922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d9d6c73a8b591fea3621f4ad66097d84a46b939abbd19a43c9cab0f54206d6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:10Z), 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/QZTAS2592176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe447ddd5282d5a42725c55cb9572e55f54dc4de703ec3b6d0600c253911c9be1. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAX2507884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ad42aab80fa171b6e16540fcd3dcec5da104434331aeef010f370f7fd7a7c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTB22536929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07b9f59798c4627f5b9a8833fd7f473175684a64fd41f780f9566fd9a439948. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ7N2510992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cd8e6f77ee2f23838ff3031b3b63eaa5670eeedf93e3d17d3cf775a9bd3ae2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:51:00Z), 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/QT3FB2567667.