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 0x8390c2b85656adffb4ac16a59b2226d0b443dbba1f30f7f81327e0d121f916fb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ec62e47-fca6-4fb4-9c17-728b1324ff38.json and https://artists.proofprofile.net/proofs/artist/6ec62e47-fca6-4fb4-9c17-728b1324ff38.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 0x0a172692dc1300ae4356aa7261011d72686084a6ef7a9f2d6c85e6b9a077663c. 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/GX89G2235685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62b5b16619e72069bec32419a2265de7cb61f47460534801322dbd06133ae1e. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GX8KD2213313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5b7b8b08ba10367034476599f79f93626ae378903bf7e97f81224e50836aab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GB8KE2315812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663daa9cfcee8148e4db8783ac6842f42ca14dff10b420e3eb1754ef203993ad. 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/GBKQU2364180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab71f2b4593a5a6ad416240aac68fe2a430c060a97553b699e71495d4696f9e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBLV62306410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5893c104aff8d38442d406eb8569aae05cb8a3cae183b9146a5accb2b5c0e7f2. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:04:55Z), 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/GBKQU2388522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd1a6c4a2d3023c06dd8af3157a26c7984d0b24f4e52e8546a71cef5e2cad70. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:33Z), 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/CH6542415425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dce4628ebe9a7167726a5f4257df62d2fe5e3c7858fa4d62050f2abae648e88. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:53Z), 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/CH6542449935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da9e2c530240607833d3273c8023499548443a65eb2e70b6830a1cc5ffd2983. 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/CH6542472936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddb4f149aecbba1683a7af9086e3f5fb53877198abd15caeec6b2b3829f6f4b. 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/CH6542468952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482e5bceacf0cd7657b87e6b1f8552eb3e26e69be141ef2fda5d80ef010d7647. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CH6542477220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ab3bdf4f97d428a2040f9b1c37aec94433e2a7b56e3418d995a57303fe9445. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:30Z), 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/CH6542489326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f94574b77cfdfc774a309970a1e930d90e835ad11c9a95ba602668ef9bf0993. 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/GBKQU2501184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25df45dadc62eb92af4bd756e5bb537f6268438b7608ea356b764bf3513d8949. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2367795.