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 0xe826dbea30950d20d4e1244005106cdd5783d93f8f3cdf8d233a5f26f0a3b226. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85703ef5-1c5c-407e-8258-60b85a8cbe44.json and https://artists.proofprofile.net/proofs/artist/85703ef5-1c5c-407e-8258-60b85a8cbe44.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 0xb631e83a311243c7f44fe446b602972ffad1e6088b644a1e6987fc567b247a25. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAY2223270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e93d295b4f60dc385cbf54cedb086b811583bf5a10f70b26376c9f13634797c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBA2288783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c095608565122fbb2abf29f1e56b75381f8a53a90c34eb38c469e34d17c6c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2386357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63844d5b6e7f0937817af9d39cc1fdd9d6577c994b6037bc95491d655510e610. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6H2347464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93535cba71f19b820cd76f581038ea4f2c27dc82e5cba0fa2ba4c6d5d7cf4eff. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMEP2368066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3547b8bab1489b7b8265c3efefc89c113d37806252287bb428c2388abaa21a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWU2326253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcf1005d793bda33300ad2128e9956f31f584dfb803d16acb4a2308ba72c516. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWZ2347738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19343af4a571a0ee464dbe4acb437f0824d173eb637d4a3ec77ac9b3b284a542. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZRP42310915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b43c953356a766a84ef8d7f37c6d982b5fda0de0bd126e3f5b386c80be9d91. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBC2395124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d7f66c4fe567c6b21d89e8bd7063fb29bb0fbf9a5ffcc5fb444a04236369cd. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZWFE2347613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a3a0a370d0549f2125b74eab53633d610f243f43e154e33d1a193794165ed6. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:11:13Z), 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/QZES62491534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cb8a957edd87a7540d8ff77c913df1711ec475b0fe8ba24749398802669c7b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN52409021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd5a87f1e5dd347cc9bc274b574e604221c11cb159ae9be3f6860235ce29379. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNB2461485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44778a2e4afe80b389777a159bfb460136cf761ac7e669c8014ec9b28487a59a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZMEQ2416198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff52e1af017cd10ed362778245089903bb1d82dd7df01785cd4c6750a34cea6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:57Z), 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/QZNWU2466973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db9ecc4a32eb5579c5c7c581805e2b568fec0deec46d403153a7016c30ae5fb. 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/QZWFN2449488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a1c2cb1fe9e3cee5727d80c53d7ab655c2197aa7ba9845d4245594c4a43cce. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:59:57Z), 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/QZWFV2420107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6c8f49fa83fc1c4b1c75c05bd652bb6098af82abe4add776797ec8cb27a044. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:24:59Z), 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/QZK6K2566920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72e8ff0979af30fd9367d07eb71b521d74d992eaba1d2ba4d1127917ebdbb23. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6K2456769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019a94f9bff4c24074c89ebf1c629b60bbd1ca1d25bfb8091bf76f77af8eeacf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWV2377799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51dd42e265ba4809d27fbdfac86f60c563832241d3ae3696bc9a88eb292c09. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBA2361904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019a94f9bff4c24074c89ebf1c629b60bbd1ca1d25bfb8091bf76f77af8eeacf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWV2377799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624b3f8005db899438af77fda5cccd69c0140386a1ade8fb3a11522d3e5d40bc. 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/QZHN62407428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd059df9331496a20920d9d00dfb79e85cd088bc974cea69828a0ef7a450a406a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBC2358148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1a854e2435032aedea3de1cf4596fad9f28cab930348ce47413ef159762887. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZHN52422015.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ada713897e0ba3f8f0d96b58818d8eae30880101d7b855faf1b062658e34a79. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE6QE2418265.