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 0xb9b0f47e0cd4c7dc440f7eb6708857853c48a5ee222345da5eb77643d4a6d078. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe80490e-fb5f-4f77-9e50-bb8448ab690b.json and https://artists.proofprofile.net/proofs/artist/fe80490e-fb5f-4f77-9e50-bb8448ab690b.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 0x5265e63990aaaaf957c32acc1944f6e458ac10904ff57a7656974caf75de9270. 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/TWAN70202019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c58ff9f8e005a4060734508a3dee574322b6d4fc2aa6e4bf1f877e3e4d3044. 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/TWAN70202022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9144d092ff6d6398678dd0ee50d6f088eee81e0d72897049108ab733a6e90bc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAN70202026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb4479cea83280e3a2a535d0a8ce6cb826375aa30acb804462a9bffecf28915. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAN70202027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5b70e696bf256ec7b88c414e738f9c44f55f0dcb097c71fe25b33a43e933ea. 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/TWAN70202032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312a0b65752ec4c44f57500fae90bbc5660986d54879e6e78298d1b18c4efd9b. 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/TWAN70202034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9eabff2a09a2088df904d4d2450a6fa57d4a2245347a3886d83e69ce042af9. 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/TWAN70202035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192324d0061440f09898a0b0687b3cadff070d896665cbb91b859e6f5869d40b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN70202037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb542b1b2cf1bd774d934f0d7c9c292b5979c82a8c15bedb50563a8dd84dba5c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN70202038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f9a0e0c98c13b4953030e940408cedaf2019a6e50a3c031bf738547cd8219. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TWAN70202018.
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 0xa2f3e5a20d46c97b6dace6ca097364ab0f4bd026e48ca54a65b7d1c93a5bcf66. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TWAN70202021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc358d0ea013b63cf41448a476f90ee2c1c0186e8dcccc7dfa029f90e303c1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TWAN70202024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d41c087b7c1c909f4932d5e2b924afdbfcea00ef346910e14264668609d4e57. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWAN70202025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4036e490946102a0ff0cdc47b714ce9c847dbf3334bf438dff5f48db718dc8. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TWAN70202028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ff5a4cc020838d12549364fb3bd22bf5aa914e4f42e847830297bf2eb2fd4d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWAN70202030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29456d81d6395e4cf54f7f5965789f17bf94dbdb2b2ad243f3c91af7435504c9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TWAN70202033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d62303587de5b7176c6ee19a17ba8d0b889b3566e22ff42b7340ea3cda9929a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWAN70202036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa283b10fe455c72521a79492ebbc66adbcca802eb5c7ad8ccf85414173b65c. 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/TWAN70201107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e68d82cbdc47d41d081dc2c1c7eb777b1aca5b6c016337d0a70c6591e44695. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAN70201108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2533bb156881936aa4e6fc59cca0d49a30d924e3c3f28233ca522e1494ebc704. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAN70201115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e99706936fc35c15e23c0f332cb65e4aedc6709b4151d60150298f0a611a8f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWAN70201116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9830fd066294a2f637a40aee8bb97d85ce3bef8388b1f2575ec059dd3771db73. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAN70201120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4428019990061b4afdbc9d5a7c9134983bb7a61411324b71ca8284364e902013. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWAN70201121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e5a9e43d57aee85844a1bc93ff6e81b020d28cb3b9f9281bf8523c3b2b54d8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWAN70201109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3d5a3a6bf34c052f9087653abef15d48c2dc4e0bd108379fa89ff1b6258f3c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TWAN70201111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b990df391a86afa2214567d6336ffa32927d8e8cdde8b47aca728accb08a99e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWAN70201112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46a2b55316400877e9005329177269820a80c37bcea59aca9ed5037d9815e56. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWAN70201114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb737a4d5f2d1d4c9b15d4e668ad53ab191462d3700162126530feec24a9f4b4c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TWAN70201119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476ac34040b61b21758c5a7a0fa944e8ce251775e57b88d8fc2ce2cc6ce98642. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TWAN70201123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b4c54d5fedfe94a2617052e0cf4c1004db8610efd1cd9be5e2d7ed790f2c37. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWAN70201124.