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 0x11a494a425c4b50315c322fb441f7707417812c7264e1887dd023c068cbf8bdc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d490fe6c-f47b-4e61-ad7b-5836a960ee18.json and https://artists.proofprofile.net/proofs/artist/d490fe6c-f47b-4e61-ad7b-5836a960ee18.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 0x837ab74f1f553419be377891c343181a595c7718d94befb0eb6e30f70019d131. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:47:40Z), 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/US7VG1758893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf48c8f0658b89958b24aebc3f79fba869c9744c3520d3be54c7603e79a68c41. 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/US7VG1782864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb04fba5730bed1c66cd1bdd0e94988819afbf44f5e0f2baeae8d5473bea182a. 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/QZ5AB1737974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3570d2dd65d9be1043284c4ea8cee3dc7847774dcc374cc481c4f3f6aabb99b1. 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/TCADK1732653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163d732f992cdee1c5c90d310044272079ee3a8dedc263d5d0422860731fb372. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:54:43Z), 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/USL4R1825108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360370ed29e2e8b9a53e868cf9b7e872adadc9e06127d7f8de09c9d33505b8f6. 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/USX9P2091270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4d6a60ad96de3aa524ffeee5979230af53054a87776d241973fe97c9e19b4e. 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/QZES72189700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50fabc0364161361a7b0456f352e8e3e61ef2dcd773c1d07693acaa71e9ff9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZES72189705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60db6b1ab2d4d50e90e84a3f05f24a43e9d63598e115cab89b9f8ba7f3557ac. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:09:43Z), 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/QZES72189706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8b9235d96f25ce4359a289fc1f4504282642e8e19b68012382bd5c4183b9a4. 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/QZDA72217665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956044a351805ab7396511a258d5cf110668b3c5e6d966504c98c859391ea23d. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:18:30Z), 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/QZTPX2283352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749cfd7bad87508a07e67fe21359f1d88a7ef7bf6ef2d74334d1e80b804b8478. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB42262975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8405f29d712d6b06ae7350c05c86e7b1c4d2cc39885474ca502f5676f3ff5402. 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/QZTPX2556195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0e01baed69ac64c3e0e640ca7512ec30cdced342ef6b8eba147550a946dfe9. 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/QZAPG1861371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2784155b48a402f1f197caec2e8c5e9b32ff2ca058a573cf0766751eee35f50b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1968864.