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 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 0x4ac78c345f2069a90fb3b36f12defe079aa9ce74f979cd51a20929a34ad81f0b. 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/330987b8-03b5-4f64-8350-08c9797ffa94.json and https://artists.proofprofile.net/proofs/artist/330987b8-03b5-4f64-8350-08c9797ffa94.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 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 0x118833545131f9b3f77235acc82f4b09bf2e3638910c06c0923a7b5a52bbb543. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/SE5ZV2000802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3902a6a7fbe1b008fa3ee0e0b07bd089807ba7c7a1d6124387b6c2d8bc093d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5ZV2000805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b664c516c918bf103f72c989b69e25984c68fe3ec9945b41584b5668ee1be0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGWX2040191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dc5597e36b50211b94abe05af3fd24f450ae37ac760c6e242b3223dbc476b2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZPJ32110407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e5ade359aa11336a58dd0ea3ad7b2e1e9ed1aa5388de89a17c17e6fa813e43. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZ5FN2247450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5671dc367567e1bbef41f6d66671016aba2deef66ef5c6b7d0ce7bb5a530370a. 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/QZ5FN2247452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da0e4b480ae327ac4b7c520263eba927f2303e065a881a5b874396350984fde. 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/QZ5FN2247453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bbc77bb44b7fa301332e2752a1bac601705534f7df575a04372da8a4673b23. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZ5FN2247455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80539b9bd73efc083c675a3d7262749439591129d93ebbdf0f13fad15d6bc7e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZ5FN2285371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb110149dabf71fce90e2cc6c2df907e92893fe707887251eea0e10304bca440. 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/QZ5FN2285395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2026ba44de528330633b275c382b5aefdbcd96726e99a457439b550e66c038fa. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZ5FN2285407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4720c46cd5326086a7286d5b9bf72bfe8e9a512a27df06f6ab3e6a198b8e79b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USLZJ2232653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505011c1349a087a87e2fdeb33bb9a6d343d5518b17811e04b8d015fe0ff7d54. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USLZJ2266033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d69f0c5d6d16ab9b695972c158976bd44504b4c2506f84d9d632fc0c74d81d. 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/USLZJ2296324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af26daae40e4973b6d219e39688ae4b4b120c8e09502eca5d5b725cbc22ab0. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GBRKQ2213088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22748808613e78da87a2325d7b4c7d20fb44adb68884479a00fe53873de0b58b. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBRKQ2213089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26780182dea2ec478217330712eb49262465b99cf2355e5455aac73cbfcc2644. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBRKQ2213090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e09eee1dbfc7fdbf2c01e52f76083605ff4a45909318d0c6f00874b01537a5. 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/GBRKQ2208298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98457f457c7f6886a12b1c0a2484c2f9e971add6cf6d833bd6573b0db34b3af. 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/GBRKQ2208300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22dc75e328e2462d12f9fea1f51602f79c2a882a90fccf05cbea99fc184fbb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBRKQ2230343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f272986fc23175eae1fadf6e26418fe1bb50f5e056496fec67583af31775d5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBRKQ2230351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf872c9aa29f47d22bea55598cae0caa86edc136c4f457313eab8e6f0fb1a23c5. 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/GBRKQ2230352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c530f829f93d5e50917cb18a825c5edaf9ff171e4b0c82783e9b641dd3b6b7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBRKQ2230354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb420c6fb5c92dbff7a01f36f777aca997bafcde6708bb37dedd72f394467e561. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GBRKQ2230355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84aab8faf746b36f17fbaa333f13bd2345e7eda384a27014496d55a8261ce580. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBRKQ2230356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91537a21ed101454dfe48dc22acb1385217e3a6b4330132bdaf59b8819357ccf. 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/GBRKQ2230358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ce9eef45763b47f8ccab6be5c01df5e68b839f595669db59c855499f463953. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBRKQ2215919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e1733aedda72c60c11b0e093c2936c77a9fc006c116160b0aee72422fa573a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBRKQ2250961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1015782a6b884de2a4d380080171e3045deab4a6f854d20903e9b15cfc5bfcc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ5FN2226054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101021e69a04f0ff556317fc8b6a39c6cd3bcdbd3e9188d90e5dda78c0f0d3b7. 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/QZ5FN2226055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a7d6174fa332f50c21f712a9825968b4de044bdc4d5d8709784cbebedae099. 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/QZ5FN2226056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811c1d0b43607d32bfc150901c43d5aad168465574b3ddb20f8fd0ad3a4d3ed. 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/QZ5FN2226057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21ce6ef76e72ed30e99e30a08b171b11630de4865c4fbe3af0c59b5a1c24ec4. 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/QZ5FN2226058.