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 0x288cbbd2625b6c3f329c53ee0f0f993bbf1a61b4549742c69269b32bbe8e1631. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/689232c6-94ff-4400-bcf9-fcada80aa7e3.json and https://artists.proofprofile.net/proofs/artist/689232c6-94ff-4400-bcf9-fcada80aa7e3.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 0x6565f4f49a22157bb6ef981c02471943c0d214f7c6276ddbbbb5696aedbe062b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:15Z), 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/QZZ662447501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe129d72c277ee0efb9b14524e4cebe0b4885b1c8c15eac3fd3c458378211b369. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:04Z), 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/QZZ662445029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdc64d3d50c20f66a174b26e9d0c722d2d7c9da773f270e994f039c6f754c43. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:19:53Z), 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/QZZ662458716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdc64d3d50c20f66a174b26e9d0c722d2d7c9da773f270e994f039c6f754c43. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ662458716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6b0f1ecc3a33c21863dc9dbcbd0ed3b846549ac607d160c0692cdb6907ef1d. 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/QZZ662478720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc62234ee653b04b96ad0ce5854a500f97db7fe42c4bc6ace69c56d2e59a5f80. 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/QZYFZ2424965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10315eab59b17bb7233ec762e2b0c84cb82ae70174023f17c59facc06496959. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZYFZ2433848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6752873ab483fb0ef9b773ec3a2b671d92daf4522d6934fea108606cd1e5e9eb. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZYFZ2439628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2eb8971d20abff8d0cd9720157c4dd43305cbe740dc55da449e7cb1b7f78d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZYFZ2487303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d02336a7e7667e3ac606867dc39fd01b0fd0856a21340025326f43ff3ce423. 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/QZWDW2470674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cee2cad39f205d392b8eae62cc558ca05b4e8303a424bdb76a6051e61bb7ae. 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/QZZ662472528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc879fa380e65baa9e1f8267ab92d98a5f4134adfa66de8c34b91592c0d372106. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZN882559880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8ac635a0e9528ff7003085379cbb4fc8dfc40b2e9aab3e15aad46ae37e504d. 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/QZN882559881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98199ed0b01f18231442986fafbb153370243dc81b6a059390a94491fa1ab9f2. 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/QZN882559882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f29e47d003f385c20e9a8b474df0965384e1cc5c0c7e4215f76ad65032bca73. 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/QZN882559883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f4c38a7a134901ae3c3741e5a2af6776ecf32e33a354b87696f099d9d6dacf. 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/QZN882559884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e45494ffe166aa79c2f2c58712bde69595d536a4e2410017d6bb9d592af32. 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/QZN882559885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc14ad9230a44ca18be980c1dc8d5565bc550096143da34c164f2b1fad5b371. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWDW2534528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e56326ead5e9dae3d393b4856f0c1c192ec41c689176042ebba1774f377fa8. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZWDW2534529.