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 0x863b79778c7b22daff6df38e1331ef60b96c2e73c49f98ecc666db48929e40dd. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/686e0006-e90e-4915-b670-b17c0d510458.json and https://artists.proofprofile.net/proofs/artist/686e0006-e90e-4915-b670-b17c0d510458.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 0xa6ec4d406ff28d293e0f3e42706ea3315d816e49095f6037605ef48bdba8e457. 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/GBHLW1703165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d6de016c71496d2fb61075e256046cebb2ea97e5f0c8834de2aae4ff86876e. 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/GBHLW1703167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40acc38190c621a6d19582a281e954b62a985147ec92264109e8c9968a96722d. 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/GBHLW1703168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04c2038626625ece67762e9c42a0a241e126a2087a1250aca33256d87d3863. 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/GBHLW1703170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61efc4836356ca3932bc0da2ad14393efde78bd08871180f466f4044aa25c46c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHLW1703163.
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 0xcc90b495d08cc958c90a136d15af775ea2a7a5067347d7172bd27001be0374e7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHLW1703164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf7fc562f25f9eb1158aae1b14c1ae2e0cdf70bf70997b457a916ad773dfb9a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBHLW1703166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874cfa34ade6b045cab2f1200fbb2f19e519906f5aa1d81a85dda5538eb44591. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBHLW1703169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b05c966650a634a21b1a50fbe06a1da48cc9d77ee2aa24c396133c0682535d5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBHLW1703171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a79c11ca82acea45d1f9728c5e2363004221a747516be757b784cb2e5f9e61. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBHLW1703172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc6c7250d5d5e51cd2a9fc35913445f80b128f80e0b1fc1ced3e6cca4188c11. 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/QM6N21762513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf11ea65c5fc6f060b1ffbeeaad249aa46178ff74967374e3c189bae0088d6e3. 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/QM6N21762514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c504fb271280e76c189a5188c1edd28600df4b496ff35c8549822465b3bf39. 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/QM6N21762520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba494f49c147f2a829c02d0ce3fb11c7fb789a93a9f092312f7a4407c792b78. 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/QM6N21762522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf387f8ad470a36480c5634b8407ed3c00ccb12cbb6bedce78ac2c71ba2fca2d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:42:34Z), 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/QM6N21762517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828f4bb641cd98b1172b427beeac1516e4146973241233902d10d871e0da9f97. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM6N21762515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01732b03ddeae4d92ee3d83549a1cb8397626e7fb23c6383fd302069e6eba28b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM6N21762516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fba5e0a5b3fb15fb57c98773827d42d5c151aa8dba2e210404772f3bc7ca5b6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM6N21762518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497644456b3fef5e27206b147ca5171957ee0f40b854b67dfe48ca56d234fc8e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM6N21762519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe640af8ba1fa34608bc345a3114b48353091f1d2138551c60a208b3e75152c6b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6N21762521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c13be41e021bec4f51c6584248b4f1c970b8eeee3fd6f5a43c35855f3a5ed8. 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/GBHLW1600973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54618e531340b4ae31d69b85e0f56e7e34a3f3e03cfda5dd995253f7511924f. 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/GBHLW1600974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256253a78cfb3bbc9ba2527a00c6fce35bdb7ac3433f3219870496928a3309e3. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/GBHLW1600971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03905cdc622ec84b9a01c1c02c064e9af30eb7feba8eff817c357535b8ecfc64. 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/GBHLW1600972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4eeb53cb154c9f1f0b57fa33cb0e76a3410a9d11935a57db6a7270a69f0452. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBHLW1600975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68c41232f6928f03f9d130f2b9e4048265d2477a88ca4cf8666899a2e63f065. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N21762453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c36fdfcc98f6e5938acf2fcab5578a44aebf6ea76982936595151e99283157. 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/QM6N21762454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699bdcd4576d74409b09a51dc3f7fcf86b1128f863ac1bb98eb27ad50734ab1b. 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/QM6N21762457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdfdd5f101c7750bd0b8f01928abb6d0469a27fc44b95d0b8a6554f2cad9aa5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM6N21762455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acd6895baf5926fd573c65dae2b32f222078031e62f1d032f5eda4e92522d05. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QM6N21762456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb964fdfeace416b2db6a9966ed3ede42a3db4364c07b30f0c98813d6878fbe5f. 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/GBSMU5772695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1db76ca7186f51f1288aae75bc0dbe186191c3e22e1c47f8f0498f2d1ef1a5. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBSMU5772698.