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 0xc762046e477ee8d2b51b7e163cc8224ae33e037a0b895ded396e484e09e87280. 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/e0d50fda-57f1-4b48-becd-4d199e6beaa3.json and https://artists.proofprofile.net/proofs/artist/e0d50fda-57f1-4b48-becd-4d199e6beaa3.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 0x9eb8949212e1227788162109f2c86932423bde60ce9f4f97bb2822e24a14fec2. 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/QZES72393366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1e4f3ba1bd86c4066bc37bf446fd674be4110c7dfefadb6c82164879661b2a. 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/QZES62331616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e9c49e4bd40bef8a86cb90c42728f0c07cf898d9a93d4235d8bcf9a46d556. 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/QZES62331615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbc430d5972ff7a89cb4db0984f865196acb77606f4df9ea2d9c7a43e5df55a. 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/QZHNA2484012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e3cb4852464a3d2a4c943aa29246581940bbc69b9c7c2a7b861bc5382e0d30. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTAX2440362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a09449a093da1dd819ea2c913cc88b227e7d113000eb54e02b816b9e687034. 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/QZTAX2443573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1077ee92cbb614508a5f07881a2fd65ce5d15a7e7ca1eae3c33c64e29b617764. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:16Z), 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/QZES62357845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e860c57992885ea1ca5853ff802ffc4c089ebe617e3be91ba8aa265580ce2ba. 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/QZZ762531580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc62ffb85f6c049cbb8aa51dae832f309f62197cf7f567e6190da62f116526a1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZZ762529045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059d86975daf9b810eb581d89b9aeeb5d74c01fd4658121c5538cfc2e08f7982. 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/QZZ762531579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73455845a99cacaeedf6da483078a15d5565af6344a1d282a3dc35311004d748. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:07:49Z), 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/QZZ782531645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfede199e70373c468c71c0337a0b6b0e6e43dbd0d00376104b1fcf90d0b88b. 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/QZZ782533683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9daece7a458ac03666ea3509b420ebf713ee76067affb68315af30808dd549. 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/QZZ782531638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a803b3d72289dd0c18c6b11fab2994faa243ea207d9317b8c271931247bd74. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:03:53Z), 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/QZZ782531667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0aa6ba2743182b4dc6729d25a912435a7b8ae79adae2fc00aff56371586ad1. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ782535481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e702b56fb889ba3c0ae6ad6cf79d766eee771f2e9a82e4066de4354290268b. 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/QZZ782531636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc163774b737018807b312710c53897b0cf84a1f892447aabac4b56b5c00c228f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ782531634.