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 0xf02383a74f74a3832a3a98b72f5b773ce99192be6bcfbe6f50fec0e106013cde. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13cfc106-411a-4e95-be8c-2c93fd3f367b.json and https://artists.proofprofile.net/proofs/artist/13cfc106-411a-4e95-be8c-2c93fd3f367b.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 0x5cd673c9d003c73136c06007fe00b02d7594daf0bf702d6ac15dd6132792dfcb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:44Z), 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/TCAJV2513784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8328e887cca7ccf6f1317d1adb3881635ae4020c228a32eb822299201b566b4f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJV2573551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32af586df37d5382da645641d00a0ef37add95dc5c088c0e4b03b6b3f0b5d7e2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:56:50Z), 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/TCAJV2573677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67415c4a03e1dcd67fe0ddd137f770637c645c4e3e4acfe66dd3b9befc3fbc9. 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/TCAJU2573624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977a4874ab6dd9a84932e1326d725ec460f73cbba7960d925e80b04426b48de5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJV2573729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b6b9290e6af283f47d7b058ea3aa71832c91974f9d52637f41bd6d8e8101a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAJW2521890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98cfa15e0ef4c508327b2fd793119147f56dd6af25c5b3017a8df8b8e94663. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJW2521858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562bab288428b4963825af1636cd49e53512cfe230bd768ab7d66addf3ca0f02. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:06:02Z), 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/TCAJW2521837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95d6d33e74679e4eb01d53612d194fd015eaba92d0dd3e4f1b531a3f45e63ba. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAJW2521876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35120580e533471ea878de4c8d06f67199cae386cdbba8657343169a20a25ed2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJW2521906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0352029819b7b5260c35f7d0bf5c15b96e0edf763947b407a646bf4dcc9056f4. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:39:44Z), 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/TCAJZ2559109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488800b01c20ff7e2eee681a9aa71d35331803fc557d720fb572a6c4f53485ef. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QT65W2582854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a298e369a5299d61c10c6e84e38fc18549c6af854c2ca75d62d54e720d001f4. 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/QT65W2582986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39cdd46f7d37283840cd26e2eaf6eb58f584e9e3fff1a753f1ac8ddbfc7f739. 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/QT65W2582719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5a37b579a6bc11e4d5d69b7738ba50a69ef62aac28b5bbe29688f33b01e210. 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/QT65W2583096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2825eaca018893900f65983db7b384493623f1c6a5acd4072de954f22997d484. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT65W2583173.