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 0x23d576092a4a298e4bea4cc3e97d861a67833032c482e00c83cd590940220fbc. 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/f8b5e185-ad7a-4939-9e3a-618877a7c45f.json and https://artists.proofprofile.net/proofs/artist/f8b5e185-ad7a-4939-9e3a-618877a7c45f.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 0xaee841a3368ecef555ca65792f3b9ad2d421fd561116c0b9a26065b45232a1ef. 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/QZYHM2417081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5964259d58d9de9336028b866cf91d98a4c03da32599a48b6c5b2b6df404de. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:34Z), 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/QZZ7P2546255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a1eb33a2fed666d72311f456b608c1936439385066a68ba2dc4f17fed7cac. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZYHM2417716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199bcb85bbcec890affa6f0228f0b89231513c59fe360c5eb49924bf34ef0b39. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZYHM2417718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae04efc1f2a5bfb6402dca8ab9f72edef355f2c8edf8677ed586fbf3ab8c12. 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/QZYHM2417721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421b988149d54dfa4c9efc99def14efd1c4f21f8ca083515e318aae21eed091f. 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/QZYHM2417726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04122968186879a218405cfe720b3f536faecffd3fed57901dcc4010c506b7e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:46Z), 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/QZYHM2425760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdd378565f902555c982c603e2d7d6ac28dad17916d899ec4b49f1a6c451283. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:09:15Z), 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/QZYHM2425761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc9da8b3dfb46efcaa427fc63321df5cc644e8dc79965c93174e0ff7223d7d3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZYHM2426413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba7aaed3722bd406f5ec3269767e2defb9a1e2b14e8da83ca3dc794f8ecd751. 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/QZYHM2427184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407a6197536e17c44a48362305c7a3a7c7807487c61c9db04ce36225c6af437b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZYHM2428304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b92f9e2cbfa3ca832fcab78ccb0742528d68250b7ef02460910c67ee4e30d8. 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/QZYHM2429215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc191cbfbfd0df7f5a4aa0015fb9c1d4333c4d01a353af9568496ccf326c2bb9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZYHM2429217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c42da596b6f501f997d3a37e805a8452fe6fccebe1b64bb5f27666ab543c31b. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZYHM2500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58849f37c4e1d03349e76771cd0c82ae46c0efcf43084f66625161484df0e3f. 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/QZYHM2500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dd13ccf5a41dbea0d02f1c79597f88856f35932bc59ced5dd73895cfec77b9. 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/QZYHM2500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ff9b9b1d17332ed52d1f2b9931d87550da6cb82065335d19c13922c8a8b424. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZYHM2500791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ec394983ac10ec0e8e4cf6e69f05126814749c42ff6e6a4c2bfc0767bb8c8d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZYHM2500792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310953cfa6a2147d8dfcd75ac72aecfb5c2921799e5f3ed5b64eafbc27ffd8e5. 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/QZYHM2500793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0027759cd9ad748335e64dd3704d2291281dfaf96213f958b90c564a691c77b5. 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/QZYHM2500794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21117c1ccdf9ac487009697d8f18f6b095ba8523310da36668c7bf9406e7d727. 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/QZYHM2501438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aabf9af28486cd1770198db14264fe470fd015b651989a08510421c2acf2dd2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:07Z), 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/QZYHM2502213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33531568d1f53233730b7c9d02c571f3a76d49ffad5179cfc05162229e7b00c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZYHM2503624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67002daf0e6d9190098269a5ce631c0b6b8d9c12cacee023a38ea6296dbcff95. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT3F32552213.