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 0xc759f1373177ceb5f8feb99f6b549a6a3abc251fa783b09bb2dda974454ab044. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/476bac90-ea7f-468f-b244-de585e63deec.json and https://artists.proofprofile.net/proofs/artist/476bac90-ea7f-468f-b244-de585e63deec.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 0x94e8d1845011d279e93dcf4102f3914ecc3f2cc65fcb1ed52172fc172cf7dc7d. 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/COA7W2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa617b1237f2865a039be8d131d88fae34ac0aa648c468d353067404df6e630a2. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/COA7W2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f33d48e31b6bbe4374185c62052aaa28a8e109cbe620122cec07a53ed4321e. 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/COA7W2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe714117dc379c26e1069d14eda7e4c3cbc4be2a15eda2266647c53f520fec8. 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/COA7W2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81793a32790868703506de35c8f2ea3ffb061250f0ffcf54aee08437dd65a38. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/COA7W2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63fd7effb701b743bbba965b8d3a40206704cf5ee1aa6ce6dc2f02ae7fb29f7. 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/COA7W2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0dc7836e6b5aa3a470455efd91a05fb3951bed8330c7bb6d0c785adbef2d75. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USL4Q1733646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b68c2ee18899d796c90fd1d7fda335aa25afaa5dd59ce2bde8778f1efaf94e. 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/USL4Q1733648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49a9ff2289fca6c82a4ec3fe27cce80669d13f8c611e0603bad213783c2c710. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USL4Q1733650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cc2ee86e73a8b55c733248de43f49cef0095eede4ca223232b5cc16c1058f0. 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/USL4Q1733651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603fa33828908155fc8719ffa4aee1a7f5045e643717cf149a4a719afaf9c2b8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZ5AB2114115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a2b221dec5e34119d96a6e7114a1e9e311a3e0bd955175c66285272e429aed. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHZ42030104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2042a200b6fc96d5f0ec7ff7a52a4a242a6e0fce79157cde39ea8dc0f31cab5f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6MZ2008246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84ace578cfb13a8810f064d486a00183372b61727e00bd0278dba887e42f83d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNJX2078244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603fa33828908155fc8719ffa4aee1a7f5045e643717cf149a4a719afaf9c2b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:55:52Z), 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/QZ5AB2114115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878e461b1c80d7b1ced213f215af39259b6a00a3b59029792cdf2bc7c747ba80. 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/ARUH42300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508bafbd75e75df8f5537d41f4ec4eac99002e12fc3e040b94dda2e3e5623686. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/COA7W2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cf1d22096e9bd1009383c988bbe39216d272e68f30e05c5b064f673ef9fd35. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/COA7W2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b0fb61cd04e50105350e2861cf78533053fd53c983ac26f9db52a78cc68f89. 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/QZ8LD1959511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad09708035e977d462e3bd34c2c778e4bd2f371af39002b5960471311ecaabc. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZHNC2278747.
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 0x609585f705b8f4e252255355560385abfeccbc84c3cb0d7b2339a5fef316704a. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZS7J2361882.