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 0x43c87e5ccc14f8b2a51373f8e5358ac05404e86228e043de7532beca67d5b482. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/830a5ce6-dba1-43ff-a5df-553d900aa88d.json and https://artists.proofprofile.net/proofs/artist/830a5ce6-dba1-43ff-a5df-553d900aa88d.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 0x98df082e74029a1e3271f97ecd666f4a3f13503ccc76a6557c623c68c385d634. 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/TCAHJ2330995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953699517745fece05037757fa6ed06de4ed203a8b707db451f39c3c308e4bbf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHJ2330997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1546469f3ff262715dce49745405e5490f6ebc15350188f54706828ebd6b23. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHJ2331008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218890e6d71f3cacebdbdbe26afd55723535e2b6c668e4a7b001d074a2faac61. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAHJ2331015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa331dc884455d8fd3d5ceaecac3fb67542e99b165e62bf53d971254453438c00. 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/TCAHJ2331017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcaf92b7b5de6c8edec52d1369678249de68eda96d7168721525f527fad6922. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAHJ2331022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfe36a8b583c58bb284a92b96057b4e16ec22b502cc3941f654e95beaeac295. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAHJ2331035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cda9ce901cae08f81eead5e245d7ba76354bd42dd9b43a98750488223e79598. 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/TCAHJ2331038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e8279d0a2f17b882d6f9c3883676d9d37459b0844bbd999059749d1ac47f36. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHJ2331053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97024d5cafe3fe4ec0e5174d9c169d8332e28396cd6058cd324f867b308b5fc. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAHJ2331055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3c685a2c9ccee060e25407df6a6e91ae35d3c57a42c0aa903bbaefde8568cb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHJ2331067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c4e6715b7a13d0ec6227f5900e2d573ddd193ff5fb21120e2ce79fdbb13e89. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHN2389938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef19cd0e0fdae350f2c28e94bb80b37bd230495b8f0234bbdd0f2683135081e. 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/TCAHN2389983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131ae7fd055f871d5e6556fee84f222a5972757bd2f3848eba2e8dfecadb3411. 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/TCAHN2389813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da617f2ae88071fe58524300df6c59b6b12e727b29f848b9cc6d5f3b68035d0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHN2389903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76502a9abe44b73901121994d85144fca41d0a00e28ebc8841dc5f93952e90e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHT2316867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fe02fb939fc9477457fd39c8b966ccedd7c95b0895ff3b46b880f906195388. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:05:02Z), 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/TCAHT2316874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2104aafe464a66df13c33fede273d5f81c6f682b299afe4e88bbe8f1d2265bb. 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/TCAHT2316880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11b9fc45339b6c4ee55aefed0157a1336435f6c33c57aa6793d653fc84d9689. 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/TCAHT2316884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bc6023223b473107350d3c9c2edb62002130b208b84aec33084fb9942d6072. 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/TCAHT2316892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d1ad538d15754a1ac1bb1fc447f6d75feffc22c83a7e258405ff06fafe626f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHT2316893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8365d5fbee133888946fed192e2d66cb0cc26ecde346d0db13d9ba66fe2763. 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/TCAHT2316897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb085d380fa8719db8e56516eac7edbbacc26551148541da6f4eae9000766d85a. 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/TCAHT2316905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143c5dc64686b1a818add9ab9ba628201fb8e51e92f3e8c7bf312d5850a45875. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:38Z), 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/TCAHT2316909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd99c9e991e81b003dba802f0f99861789fe061a8e8be48c47bca93aeb447c19. 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/TCAHT2316911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742c5d7f822996e1e84eb8806cbc5cfe4d6c33a8f7becf6b358643b32e3011f8. 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/TCAHT2316936.