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 0xbeb4ab291efe26cdb32baf63836cfa952aabf14317032cb2fd8d3c6eaacb1610. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1307cfe0-6c6b-43dd-a218-6b728301dfb3.json and https://artists.proofprofile.net/proofs/artist/1307cfe0-6c6b-43dd-a218-6b728301dfb3.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 0x183813b3a784bd83be4c8d0be906ffbb2424f43860ffea868836d1224ae25acb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZS652454378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb02eee8131c77d543acfb34de6b049a71842927031495d99887fb243820885. 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/QZS652464198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2af8aa2a2a4dd2cea229a7cf9c92ca09100d0eee9bbb7aa0cd065ef6b3c809. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZS662442623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a419faa85151bbce952847a6f3eed8eee7fca322046c101fbbdc4be13571a85. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZS672400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7b72322e58efbdc5b2976546725c94a9643faa7534196cd513f9afd3523cb. 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/QZS642450444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4495eceb1de90261fcf710fc4dc30aa6d049da14b244b4d6411a27377e5de8aa. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZMHP2414719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9f823da0475a8000f535001a0b3392a5ddda878b7913db9037588c32b9da12. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZS652458225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd6489a26e340b845c7b04a87a1da869422580539c548eb26a2b19ea503d8f5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZS662494031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadd4f23d9e4c5791d786f74ca36cf17e6adab8e58b4697d86188a04e0e934a8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMHL2438166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6f1cf0de0b6a917531544bf6d0a62531da501f909e8ed7ff734eba0b0c14a5. 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/QZS652425301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6766ca8eb258d3be17e18da5991aa29002d619dbbe4c095cb183f79078e80a10. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZS672491339.