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 0x4de29381b0cbc090685cffd9d9aba5e8e77cf1d5f8f46b493e4865c5026ed8eb. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2317ac8-928f-49fc-9a94-bb4eb5d49984.json and https://artists.proofprofile.net/proofs/artist/d2317ac8-928f-49fc-9a94-bb4eb5d49984.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 0x26695b54faea0ee924101079031ae81f769cf6ce98cda0d85f7b4e9aa7b2c848. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USHM21816723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc54801631ace4599d7f30e20c60ba7565b071ef4b9ec8c8889a7dbf84e885c. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:20:30Z), 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/USHM21816779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85840ad5bd89cbac5295863f515f5b7fa33928e86b8478afea1b2da23f1b6814. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:37:36Z), 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/USHM81865122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bad71482072241d32b7eb29abb50e3dc8eb104cfa2b3f648b27009afa5a15f. 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/TCAFN2141131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626d4e08fa3d2486fd5bb28184a453f9b972ca06574c411b81b8e2428c7cf4cb. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAFT2162431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f32c181208b8d226f317e6f56a05974e49b86ca05720fbcfd06825d0f604b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:10Z), 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/TCAFR2178176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c5091b6a74e59093d90f5adfce7ec5d3b4ec91878a5ca8d56daae033843981. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TCAGP2264426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3080587f06f35941b6bc405ee906067eefe3821b6ee279787d8b75660db0adbc. 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/TCAGJ2231936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc159582ac2a34aef957c8a0f3c0256c1f46ad6fdee863e7e930ba2cdce0d78e4. 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/TCAGG2226541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9e6616ffee65098d1e978b61c64017d01abfc27ca283baf17870ca494a3acb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAGX2348356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516235aa61e54292f69ecb13c6e4fec28d42aa7b2408ffe362a79a479ea99eca. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/TCAHO2371473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959c794b772518edd3111d0a1dab3aadf7017f76b4bc02f0ed6e93805c482dff. 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/TCAIA2406250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479da73023a20ba80953c0c26129066cbba3c7164761b10640d487924f0c239a. 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/TCAII2412628.