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 0x90451542082435a7e956c99e348afbf7324a2fee5b6438434ccdfe53d43916d9. 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/41c589d2-b8c9-43bd-bd65-9aa21fa0405d.json and https://artists.proofprofile.net/proofs/artist/41c589d2-b8c9-43bd-bd65-9aa21fa0405d.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 0x734790c6e0411ce49b619961eabcaf701ea0d51838fbfbb94b0d460a378cb5c1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWU2412508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bdc9e3bbf7aab4563caa90a1bcf6e39c8d9679824be2df2ecd1e4ba1b5fbd0. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZMEQ2416836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ae4ff2e081eab27e756f5ee9492af0aa5dd6f503fce5d85811eba9b5c30270. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWT2483795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13347e80a22536e3285c5abde487df9466e5900cad642c3430e2dfc28d86014c. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZMEP2452993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff9ad2379903ad58279a4813bfc9e967bc31010ccd4aa23753c9e8fd22914c1. 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/CACWV2502481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237cac1bde960663e62aba28dac7b82048b08399fe0eddbfec72523652f37189. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/GX3HH2363050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322d6d8bfa4f5df3c43dac6d2ea198eb96f51dddcb286cea58f803cc2ce548e3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:19:02Z), 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/NL9KR2305233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a286927913ebdba2320765d9bf3b9e6809eea83e3c058bf2eefbe8ba1ea363. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/NL9KR2305237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292000044e0155b065febd2c95b8045726d8181f2788a59b3939c072746a1f12. 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/QZK6K2432268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cefcfb2dc6c9b7dfe973bd75a75165e3131f156684b98c91d2cfeb49daaef97. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZK6G2438456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34280658b4ab4843afb4f3a2f3f7a4f4618f5f968b64535da91f66beff47ac1a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWX2446194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5a419f083d0b32eab0fea4afeb802b63642448b286a6e8ade436d7e2bbf67a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:32Z), 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/CAENV2567262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78125d01bb34f6e738d595de8a216b333dfcd4be345d842bf9a0b5b37d60c4a. 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/AEA2Z2558345.