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 0x4c6c2e00e91e188d2d15b4640b7a8f2e89e484a9bfbb1573d255b747d7282a2c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e037387d-7b18-46b6-8a69-ecdf9f20798d.json and https://artists.proofprofile.net/proofs/artist/e037387d-7b18-46b6-8a69-ecdf9f20798d.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 0x447d61f99918aa9a463f31c2cd6692df57847161f47fe2cae83b3053ebc0b714. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ52039038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a89e2a79cb370eedd1cb87c6f3571086acce4e91e72c409f838143e4e6c933e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:51:15Z), 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/QZFZ72009220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87e3e62788d62a3216f8fda97814bb2ca41d1969255873c43772e5fbefef5a3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ62074021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fb4d5669896c56368664ff5b3a80738b36cf5c19067e6daefc705145c990f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZFZ62084812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2351c5165c19a1808c48ba53ea1c38279bb5bbea937b5c15d399e4209f28a75. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:22:05Z), 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/QZDA52090691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d174a243b5bb60f9a4eebbb2ded63dcea8368f87101f0211ef06c2fc99e13d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES72038202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa8c59214dcc2bcecaa623e199efeff8f8027d92be551e2796b4f5a436eb6a6. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:51:29Z), 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/QZHN52018522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110052c48a1915ab6d1f7920fa3e9b6be92506dd3452f05b7f2294c8515b7ac. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:00:31Z), 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/QZMEM2047573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac60b03fd929728105c6a7d371e795364caeb50730c1af79e0280378b580cca9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMEM2047576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c908efd048d70b330333997d9587756f523696faafd0e9c933c5658a2c3ce86. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:02:18Z), 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/QZMEM2047578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04282dedb6eaa4646958a56d2684308c62af3dff17f9aeec2f59ae92f5c254dd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWW2034897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa632aa043e2517772c9fd543e629c80e3dc227ee7542e1c5cb71fa8f9cd317. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZGLM2519649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcb7b8fe328b150c73a4cb89171303b9b56b523cfa1a3a19f96d24225fef0e8. 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/QZES62087505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7cb2650db77c0bb2d4d4838f2b8303d8efbcb07dea1748da27379fddb9f4d4. 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/QZES62087508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa946dbf7fea97e9a0136d922ed2b59c1e09ba3213e28c88c1da61cafe936749c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHZ62234463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ef457fa004207571421e977cc85880052468bf3403bfa47c4e5235c7576a5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:57Z), 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/QZTPX2229361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda90d37c96ddcf5f98b8e2ec6f3bc6684496700e9ec8ef08f6ce16eea4e85df. 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/QMDA72266982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8301dd2afa7ab4cf00de099682fd4a999419518266cd9cfedc8e68a67d84ccf8. 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/QZGLM2358027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fff870619be74e8c960b65e43aef49406c52ce9e1ec26e3fe3dd488acdabbf4. 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/QZNJV2326231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeec71029c0f47eaba5a0e4e8d5655d55a4c8e58b66703111fdbebe246bf7bdd. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNJY2425078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbdbd27ddd962df10fe1e47d82bebc6f73fe15d4c361dbdf7e2a445bae23f78. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:36:48Z), 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/QZNJY2354400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c7dddbfeb4b25aec68efe3e00108b34567d4f99cdb1f5528efb94a674b350. 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/QZNJY2354403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6f20874523de7d6897513cf44f3e1696ddbcf71c5f3ac0ad2ef650b8a1bc4c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:43Z), 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/QZNJZ2400855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe14c5ef3deddc4ac911965effadb6ba912fb2e0ce2d89bda3b4e42c0d7cf0a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:21:17Z), 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/QZGLM2519858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ebb57b50308bc89ca90dfe0466d081097ada0a51a9cce85552759589dbd29f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN62055444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3b1f6d935829e41d5e23304620a64af283bd68f81aca88e44fc01d9a90e61f. 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/QZK6H2048389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab812998d55d50471391178de1f654d1c69db95ee9aa11de274740c0b292cda9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:17Z), 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/QZHZ52025423.
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 0xcee85f8a0827b14229a2f90ef2dce60704e877b32c32b4055941a80077732eb5. 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/QZK6N2201301.