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 0x83170879e91cd77100b493a2d0a003693d172137be99958e8142cca918b0b12b. 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/f0a84a9c-44b6-43cc-9030-7e21de524d7c.json and https://artists.proofprofile.net/proofs/artist/f0a84a9c-44b6-43cc-9030-7e21de524d7c.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 0x3e12cbc0e507dba9a72e3b7b5f6e7b45f601679abcc9a708bddc35ca203fe803. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJY2167505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fb26d05da9ca640b27e2f0e7aee6e5ce3a10f324e9cb784046f8dff170224. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJY2167506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7a538bd634182af4484e71a76ab5112d3bbf4b9c704276e95d1d1be5d0d4a7. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNJY2167509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3eefe2863f25dd9c963e9f0c3e727c2c91ab8a1dea12c4ca09559186c64f5f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:24Z), 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/QZTPX2127986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131ee32e41ae32cebc7863d3e115c275260890e93b3049b6d5da96f47ea4fa7b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:23:54Z), 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/QZTPX2127988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77407698c00b59840364dee3905b4be71cf6fa65c02011ee9bfdab578d7c904e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTPX2139384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad91b61a9ac42640dcc1e8314e49cb6e4e9735b8fb5827f6def08e98e0d0446. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:07:51Z), 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/QZTPX2139387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d8a9e68760e98cfc5bcdf5a5aabd68b2621e71b73be69c02137e6c013ff60d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTPX2139388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d188db0d29184629809909687a36246b6835d257a526c37ec822b50904670f4. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZTPX2144601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9efeb11a8e9b9f5907e49a3a08ab66b3dbe61ea5b9abeb54cea76fa5ef3db65. 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/QZTPX2144602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed220450f4d0dcf83e1d078759f287d6e618db8ad36bdc9ae51022e95137695. 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/QZTPX2144603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46cdcc2dcda764734b7536d9eff56279aa51f4296ff8b55a0d9b22883032935. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTPX2144604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1db386c9774ef8f55fb410fb9f2260aa9c3f7d5c9599e523c61bd13089444b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTPX2144605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe425fb1ae485b50ad899bcf3277eced066cb2d11a36b248af13888187a4bb39c. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZTPX2144606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3257c07c596019c14a59af286c58d30db08e73521d5ce669cc6414358a8994. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZTPX2144608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29d5c4cd898cc396ee4f70ed533a166ce61b52eeab0ac009d5a38dd9ecc1bb5. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTPX2127620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cde9d4fdc713fed3bc5b267c5e8d6429c370d33cc96a195046e462c01a02d56. 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/QZTPX2127622.