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 0x39a72cc7b42dede19ef1573da701c665ac18d7036e0aaba572291117b014e6b0. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/545e2e2d-32cb-44a0-92a2-329758bbc38c.json and https://artists.proofprofile.net/proofs/artist/545e2e2d-32cb-44a0-92a2-329758bbc38c.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 0xc96608f76d8c1dac97ff07020e471ddf9f799831484e1a3868de85f9ebbea611. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB52236513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea00d44249e2cc96ab16899e3bccb2b02eccc5d5cd343831bdb950a12d03f3b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB52236514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deb248340f02824d5f79b3773a48352b055e9792d53ee8a04cbc423b83dc3c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB52236518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d1bed0c496b7e5ce0b4a6e77231a7a7c89a238b7679aaa7c5be70549d863c6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB52236520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a5074d082938dd4d62809fbcf0038c87dff18679883b39c6c2cec48aa97eaa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB52236521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0b833aed5af9500a174f0a6e0f70afcd5d4adb93c922c3841d66e72b99e1c3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2216938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f42d37d9987ec857b63368d7d27d433bd5beacf9219d89e99a4c6d69043c3bd. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES71G2216939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6706033a0f25032a3648ce3a00d5f0a79b14acbfcc4c15eb80e7280152498949. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2216940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779ec858371d579edc590e2cb7cdd7364384fbdd76fa1b279837a2c25e8cfae0. 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/ES71G2216941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3115ab1b404bfc9b01252b77450888cbb8f733df902268c9b0b63938a6c03054. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2216944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b59c809f6bab936615b805f37b032f067461f503ceae678702cb4952751574a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G2216948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93f7dc68b5f2c94fc11a93aed5bec3146f48d0a160c13a4a33ed7515940d730. 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/ES71G2063533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687bd6fdd2858663b7f90491507002304b35577c0585478630ef050b187bce95. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2109871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f1b6ee2a834b16b71de0c15df46fbfbe6abf23cb3baf461b1fe38f3e15ccb3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2109872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4f7351f232b50378bdb6e2c222c9f4ea3b0f3249bd9fa10919a00d7b80e80a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2109874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339fef4ea7690de241f9506dda60f96d8ccbe7ff52f122c8f311bd3055efa06e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2109875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd348757ad9e78ef6409af4521486827acaf815b926f3687183b584cc9c0cd59. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2056810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a301747345ff38110f97bf9f063a0b4284ba56a79619cd8af172f46b4b0e0e7. 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/ES71G2223899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc271839455a604484b8ee1ffe97c153f45a852ccfd6e92672f50146be714a181. 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/ES71G2216322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10e39bccfd9137660431769ed6aca40dfdb9e3f40d71b6c870cec5b21cf29a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2218058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a301747345ff38110f97bf9f063a0b4284ba56a79619cd8af172f46b4b0e0e7. 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/ES71G2223899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe70d6f4c17c43530c905e3faef4cc1aacef05977ba987484db9bbd6117b2e2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2239869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4560e939b88ce35d5f19e1df360cb0d240eeb67a1fdb23d2b1565ef34dbde5. 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/ES71G2239871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef980051b8ecd860759ac2958349305d5c7334740697088e06bc76770a3fbb06. 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/ES71G2239870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc47bd80ab467a4cda1d30a2a206e388607689d28f4a7297bb10a62836ecea26. 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/ES71G2239872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369dffdaf2f4dc8eec3281930c0f8f332e8af27be7e440aa2091eb2174502ccf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6QE2455591.