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 0x6c1fc9c8bc3386413f603d7514169aeb90bbdaef83f0b4f1e5fe0658c9617f4c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f223ece5-0fc0-4bdf-a11a-68e89839a8d9.json and https://artists.proofprofile.net/proofs/artist/f223ece5-0fc0-4bdf-a11a-68e89839a8d9.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 0x8f30dfb962dd105916d89fae13af986a564642876920feeeb659c159bdd56926. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:26:01Z), 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/QZHNC2526338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cf2aac8ed8c18b0da6acb4d0ce04ad00d2c0e9ffaab4978d6666d04587501d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:06:59Z), 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/QZHNC2523811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f000bcc6bb934318e7c373a4cf85f586e84daae6317d0a5785d23a646eb12e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHNC2518677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1f9e2e513de649d5e39b474401d98194a50e0523234242e1da33e200c0fba4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:43Z), 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/QZK6F2502115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b32aa1b00e23510b78b96f4023f34e51000a55c8b102857ecade03009b1365. 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/QZMEM2524416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2728402e09e9513168ab89a2da6a708bda094de19396b3f39edeb1cb24bb884a. 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/QZMEM2524418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d66ce4d03fa86d8841c11bcbfe43e6175b930b68a8f27acb06333000ed60d48. 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/QZMEP2516531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c394e36d417b2dbdd8c22f97b94f1ec510994b87b3f817c8f009538f23893. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWR2543254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d667a8b506ecff3346d0f36802981c8b94f338ddf3a03804dce7bb9da91794b. 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/QZNWR2545576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdcc1f01b3992eb53593427dece4be934766b8e18087b5bd46c5252ccf09669. 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/QZNWS2548394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5c65fdc50517f74614345c8402f889c4f4e9e66a3e85f0addb397281932e56. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:37Z), 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/QZNWW2532004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6515febabde1326b1127f209f38abfbb18906617d25c47c4686400412380751f. 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/QZPLR2516155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db0ea3741f876cb14ef7bdc66e2902784644c48423cef0d5776f196c8f47e73. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZRP42504101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef5313ebd552fd4b80b5efe18a54e5eb830b7026c2b466f787b1b4f26d0dc11. 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/QZTAS2515195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470027ea2ab761168a4da3f96657baad4e4119a98d6942dc5961c0e29493114. 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/QT3F22513090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7382d4ff83ab1d2c527aba6222267cf3e20405317deed8defe05e13a5628d2e1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:44:16Z), 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/QZTAZ2554165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54075b6e2798f2471ac6c3e227240e4f314f7bc9ebaa2e56dca02cb4ea7d50b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZTB42542863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26c7c2af4c4456ab0fa4f01ee82ed8d014d94479ef0efc5321f7de765901c3a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB42595369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8925316e5688916a348244ab7aedefacb5be45b83d9adb3357ec746205431c47. 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/QZTB52548587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a56bc6bab2efa2579277b87f63305814e51024fe27eba579f9ec7130c64b854. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTBB2500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8717fe32755f1886ad3efc621aa85274ced10fcc381b8d51ff5c92cfcdf59236. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:30:00Z), 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/QZTBD2532276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d3830a27e596b21b03a628f6894415742da3f62ae5bf8caf3b4764b09e1ded. 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/QZWFN2512212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a06d53716304c874d130b2f2fe5069d6b0d2f8658d9455b7cc819e5182d925b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT3EZ2558908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93b718ea1635b3e7a24aa792977b9f138e86afd2f7d09a84531add8ce87b431. 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/QT3EZ2558910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da95a617c553276fd845164edcdbe6397949e1a7befeb64c1b2c9f12833b96e. 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/QT3F42569200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4db40c5d9a7acb78d98f7848b670731eaf8826ae4b722c1730fd1654d18fa5. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:11:08Z), 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/QT3F82591718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f17e1910a272fbf4684e8cf57aff96804db78ea36e94fd124fe29b8317cd35. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F92511432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8cd9a03c3a72cde0a1ff14414857268f0fcec49b65d9d511f42e5ad8edcd9a. 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/QT3FE2534945.