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 0x189474db47e5e9a5dcad1d7e674c2c38b0150aaee44a44f8128f2e9df5299fd4. 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/1b52d186-eb30-44be-988b-e2e812c6f2e1.json and https://artists.proofprofile.net/proofs/artist/1b52d186-eb30-44be-988b-e2e812c6f2e1.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 0x8443850401ed6e84b69e083219e12aa8cc579a1bda888a2b94870ffd0d76b251. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES92127469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca64801d419568ed3bb23c0b2640715a3fe6589e68822a8595cd3f461c82fe7. 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/QZHN42138186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b13eb3d3c57e9b4de2f0606b4cd0ff3fa408a8d725f95583af0957d79fa3b2b. 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/QZHN42138187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf720d4825452ff3baf8f8752950aec438bedd3aa66dbcd64d5eb6112ec2de8a3. 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/QZHN42138192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab7692672c87e291ddc3430d9802ff6373c0ad6c2b7316cbd4852d9061bf6cb. 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/QZHN42138193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1df99354893119a03271ff95e6d7a6288ebc29458de9e91a443edbdb625239f. 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/QZHN42138194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3a64624a3d68f3067753112e7a5432d3b654594c00d242b45f3b5636bd47e3. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZNWT2168809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1796ac1c5df93d011b052e2da7a69550267839124734700658aabf20c77f00a5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ42294953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c6938bf6b44536189853e74e100bd78b0ffbe6a0a0b9359ff1ff952254bbc8. 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/QZFZ42294954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3f1cd58ee5ec2bd0af357630ff4635c1e23c099acc119f9d972189a5523751. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ42294955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd064ffdd4c0ae14e20d8a3ba718162570d5b12bfb1cae9e1b90df9086d32a992. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6L2306759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cefcb1fb2e8b95fcc756204d01fa2dac6645b11f0024ba7fdccadd773a0ac7. 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/QZMEP2314107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bd9ff5c77f61fca8280580e162c0f51b89b4fc6c0cb56ab01264788f1ff149. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZMEN2333706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639f86f1df9327039f389367f3d22a082de68f72cbb311b0f3b3553f737078c0. 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/QZNWR2395289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe697475cdde2f520abc9e7373a080bd72dc28f5502f4a9f08e41160492a0f7b0. 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/QZTBA2307799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888607d7562938bdcb3f0be718d01499657e4c9e7caaf544bd1d8d7753608aeb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBA2307800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c12dd937052bb796425cf9cf51a6a7b1ca5407c19f4b1ac258fbf0c53ed5f8c. 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/QZTBA2307801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bf662e446a5ca2ff64317062c7f094d8b30a8c6ee14dc00b13c632814b2c23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBA2307802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c5d41a1f1d0ccda55a90ff8faae8fcc67fb59117e18093896f8091dfccae6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBA2307803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb09385b92b8a20bdb87c3b6193fc426f5430563905ab78372ccca3c4c689b6b. 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/QZWFQ2387979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e9754ffc64bc9af6b2b55535830fa3650b926b3094cc3463481e3e8f0bbf6a. 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/QZNWU2493069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0125800d6d0c034a164099ed1426a806ca412641bf88faeb05af0a800cb39842. 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/QZNWW2434807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b9321d666db9287dc7bd54a8d94528df14c4a6c3b4166f32e42416a2826430. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWW2434810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe114c921d29161e6c6303ee49de37db1c93ffb6befe7d1beb6948bafdab476. 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/QZNWW2434813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61f1d5243d2d5a6f47fd56d245f1323193d080e01253465320dbe2449e63966. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWW2434815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e34b2f5442c59b70d978350bb582dfe9cdf54df568e15e846ff315d6ec8d9ef. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNWW2434816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194692a321fa5ea7402648e3b522b6a973536107caf26e0a00ddfdb09ec78fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72416912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559bba833df7279aa566fe12a83c12becb1d4e71248e56a393986b18bb8c325a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:03:21Z), 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/QZN882421385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeded92c318adc87826829a7edc9504f40d72336f301a615afff6909bb57b8821. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2594798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935f7c432cb5c29a7aeedb3df7a50b3d44f33ef9f01b07350334ef561b3c83bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6H2250418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad68a49919b7b9fc2cbe37cc01b775c1efb6cf1b4eff4280c0ae413d4c5c1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBD2419385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194692a321fa5ea7402648e3b522b6a973536107caf26e0a00ddfdb09ec78fe. 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/QMDA72416912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abf9aa34bc8866cf316ff55ba512613ee56ff5da1bdbd692ef6ea6d6ba0e404. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZXD92300062.