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 0x8c669b08dc677708cc54c9d6f184c84b15e4e4058530a4bd1f86646890e8e8ec. 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/1f69d530-af09-4c8d-ba56-f979f707510c.json and https://artists.proofprofile.net/proofs/artist/1f69d530-af09-4c8d-ba56-f979f707510c.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 0xa5216e4a75df63999b883de660f90ef20bd35cde20c647e5402daa6b66c42568. 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/QMCNP1500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7187fd92e2c518a3c2ca0c9665e527042e01ef584b14887e9082b0a4008b28dc. 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/QMCNP1500291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5699d5379392f2af399f029a7f79f5ffbd21e6f079d03be9d14ce9f90dc13a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ5AB2064020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bddb3ebc8e7721eefa410507140c7d18e7b02a93ea2a5eef3a66221a00b471a. 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/US7VG1812207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c12b8abf9a6080624b3a4d5f59cb02e2b3c9a456b5dc00cf90486d2e077b319. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:48Z), 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/US7VG1812210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49557d27ab3c456dc50a5219796abf34424741f18645fef7494f5bb878b67abb. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/US7VG1812211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77820043bed8104077fb179001b66a8ac60da633c3453c52ce61365eea001366. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZGLS1933561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39c20c72522c21d37f333ee14df76ac85f14c0c1081f802390e4a0393b90661. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZFYX1901543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca20730689a33821867613d95b4fa589671b0be3b99351aed15ab838ba939c92. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:58Z), 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/QZHZ41959461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ca155cded2f450571f6c0cd4503618d5df68e67c7dcc54863400d6308cad87. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHZ41959462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db2f23a1b5ac8d18e28387eef5e3da4381d1ea80dd94cc48b462051c0e7e934. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGLM2013559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48c82d3d6cde829372c05b3e5b22adf4b0bf95ae3fbcfb532888c1d04c02ff2. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZGLM2013560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f71a3a9c2fa6bd1cf997b022903f0c1524118d166c3bab9228c4da3b279dc6d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHZ52085330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5733375d8da0b82d36744d0f3265916f61279c80aaa51fe6e924ba0e17d96f. 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/QZHZ52085332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7901df5b731b81b1fb7ffe2ffd30df98e1b74eae7d80210e30362e82dd485fd6. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHZ52085334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e844e3e5299a52680c74d10ef0547a5f17b73af5e2dc376d4a99395d607bc60. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZGLM2171574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a25ac07331015e71fcfa283617ae25fe7bf78fb53d2448b3a818c65c7153a7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:34:57Z), 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/QZHZ32121882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd482e01e3accf2c6a1a5318b1bea78741cb4d8d39093dde258333aae750a93c7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHZ32121879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36ce13b6ac73ebb65f0fb249de8eee1946e7db44e79da8211f5c875b01bd103. 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/QZMEM2341814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be7a9d344126fc49ba33b96de0d9b25ece5e9a3627774d4293df36ed0fb8b69. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWT2288845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a157b7586d4fd95e13628aa23042ec1854a7f91a309e8fc346a898153edf0c9. 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/QZMEM2341815.