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 0x5eb0de303cb4b7d428f3b5976ae391a7266288096246b556c98adf8c749ee926. 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/3d818fcd-e904-43f5-aadb-f2f077e3eb9e.json and https://artists.proofprofile.net/proofs/artist/3d818fcd-e904-43f5-aadb-f2f077e3eb9e.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 0xe62c8199ffd44bb09d15de43988171afa45f0f1de443b157df8752ebcb6e2ce6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:23Z), 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/TR5780800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f8e7de54e9034e98f808635e6b225d5f9f3e0e61f44f3aca62d757d9bf3815. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TR5780800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebe550630bd6c29a7bdfc644e65771a3849fc5c5adce7c1745eb0e7bd1afa14. 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/TR5780800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc20aa1754f54501b13792431b4e74bf24e65d61af262e55d0445072575faef. 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/TR5780800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d1ab8176594d2788b13ab46167bfa349053098ae51cc42a88fd36ac9e12ba2. 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/TR5780800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd675d534d499f6bf25da6cfce814febcc730c29d039901196f3bc64f788f638a. 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/TR5780900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49e0406c82dbcde3d70f19189519381f15db467760d5b2497c94492ae374c7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TR5780900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb398515fde692830c55664c3a3e1737029772a8400bc4a40c463586f416515b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TR5781000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0622c4d6086d0c4a9f98a702d174c0f4d6fcc76523a49e29a369f46a079bc49c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TR5781000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde6d611bb35d02b6dc6f9283ee9d60bf4222ab00f9cc37e95655e0a4c150a3c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TR5781000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1083d424db84e06d4cc8a582fdd61d7e806ac2f91f66ae01e6a6921a5428cf. 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/TR5781000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fab118faad956b992045bb31782437c9e7b3d41171bb915f0b29fe7016ca19. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TR5781000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe778cfd810791879b642ba34ebfdf2af46d73a51c883bd6fe16b51f1eeefc8f9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:02:38Z), 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/TR0550600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afee385a9bcaa3712135858a43b918f9b05af0b3180868852aa5a058ae92239. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TR0550600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf34f59f5ed93aa5abba3d5d757a59aad66e54b6109983773f0889334b767ecf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TR0550600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27468ea4be535db3bd3d84f2ce63c43f71511dd2d9b01bc6dd3a95a737e13753. 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/TR0550600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4417cc2f53ff7665ee42bfbb5cb059328b4487d2526530c985ddf6a96f462f. 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/TR0550600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e27cdccb874958ace367338618808a50160a89a684688f3507d13d8bc497b0. 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/TR0550600051.