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 0x067615743130856758f6ccf36cfc0cd7eeb09b3d12c0c4641080fe681316712c. 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/d332c2bf-3938-4616-a964-4c12835c850e.json and https://artists.proofprofile.net/proofs/artist/d332c2bf-3938-4616-a964-4c12835c850e.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 0x0cc922a6e1ea09a59caed31baf375a99b679a590e9a37874d1fc7531b800e424. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:48Z), 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/QZMEV2285887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90f6c88a7f282583acdcea285e7923748145c46cd5e1e33279cef183d3f5a72. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:46Z), 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/QZMEV2285892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777d205c59abdb55817e0e2f712a85badebdd9b23c901d78222d7255b0e9b3f7. 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/QZMEV2285894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c20bbea420dfa8ca799ba8c0f9c3ddcd5fcd4de467205c7ecd1f1d04e22c7a. 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/QZNMX2233175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5867a004c5c7430002effac5431f213a59dcb625d61c08ed679dabce26c3d1. 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/QZJG52342978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd889a7b34e0678ccc45793a17357c89d402dae7f5c9abee5a397e9e2590f9448. 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/QZJG52342979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab25672903f8240d99cedd7bb1dc89f65b4e57c6d928339208c0b548b46473. 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/QZJG52342980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd881f5f926319a787649efa3280addc7f2be3af01ce247c14313ad0677e623d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZJG52342981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd9d9400f9252c04d4a094a18dc53accbb78f55276c70b9cfa53ce93e1fbe2f. 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/QZJG52342987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad052a80276068cea746a0a6af412023b43654df22ee5b52116c85ba26b6bd7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMEV2371423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f5b774a404aef2e2357abda9fe70704d526beb158290cade485a0f0e1c7d22. 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/QZMEV2371424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107525cc988cc5ba41bb50d548123f154e438941d06c00ae77be43285af35650. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNMW2341585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccd5690008feb45319f10cc8b9bbf1c1cb9830394ebb2648cdfbfdceb78fe54. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:19:28Z), 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/QZMWW2427464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab778848f2d45a6a8daf94ce414803c484d1b20dad005bd2321a3b82af93b45. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJY2404699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094d92d1d2a13a24450a33520f6a0efd5a66d24146ee9f2d735adce3ab88b67. 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/QZNJY2437483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0977611656e6755f6c6bbedf4bf720d3fb427e0b08fa419ecf76ea002fa3dd1e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:39:28Z), 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/QZTPX2418784.