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 0x64b5d2547dcef92578417e347a1a0133d26409fd106f477612e4a0c721b37ad3. 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/01c11647-65ae-4010-a269-2f3aeceef015.json and https://artists.proofprofile.net/proofs/artist/01c11647-65ae-4010-a269-2f3aeceef015.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 0xab3ab176a432c36d86b2e383a3050955575d80837cfcbe908680c74024f18b2d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ATBK71201486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a64bad7b612a2728e4122c5078b97ee5cd95fe8b1d146b92f13778c566de9a. 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/ATBK71201487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65af81d7b6fb381b13a8bdac6acb7111379afd1b1257639d7079779d96d2f2ab. 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/ATBK71201488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70ce4e76f9e6efaa5d987fbf6eca7bc017c0ba077d72156217441aa7a148a43. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ATBK71201490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d961d09933b8078eec6fc9449b9974c6b3f5172037860555e4be3ffa064996. 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/ATBK71201967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc68aa1dbb2cb30cb31e2c396148f6641004a8f2b2dfcb93a6b8be45b2a118c4. 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/ATBK71201968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d31618b90da83ed63a1639b5822b5768a2c3d7b6fb9fdc6e4af897255ba3adc. 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/ATBK71201969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5073a9de09bdb769d902a4731b61ea81901793040dc6010e436547fd921dc53c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:48:46Z), 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/ATBK71201971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82de2cb752e8ee478198c358c7c702346c03896f17f5fb9b0361429bd2bd64ff. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ATBK71201973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d03d4318cca4e3fc801f1b521c969f2103b3c1bed4d0be025f1efcdfa78488. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ATBK71201974.