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 0x3eb5113ff11ff1c552ba5f70580bbe795b1a4702e950c450df62359c2cfd6fab. 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/099b2601-c5b2-4c7a-aa0f-75b7c78966cb.json and https://artists.proofprofile.net/proofs/artist/099b2601-c5b2-4c7a-aa0f-75b7c78966cb.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 0x3904feac3a66ab983b88106580b2553351975766e1791cba7b86894b0c332ea4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:46Z), 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/SE6XY2124216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122011387e522790144681e65320cbc3699d816025f64c413a9b72255c809268. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6XY2107478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999db1267033e5678a7945de157acb0c3cbb4027f105d6e74c6655799ec0334e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USLZJ2267042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa063605a92c663fe7637c42164341f773c72aa3e608e7eea317797a8164e2bf5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:26:53Z), 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/USLZJ2267043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc4bc08304ca5db0b9c665afd05ec330bd823d75306079149b19ec5a6cf32cc. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USLZJ2267044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82d4eb04d54cff678f786573e28ca664d3da18794ac99032c649963d7085328. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLZJ2267045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f10e2260c03a89e36f02f461cda01d940cfd2f4816a7c90949566e9842d798. 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/GBRKQ2214294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c63fd53c2827871bffcf01550bccfdde99a4397125510a2fd0736ad4605f480. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:49Z), 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/USLZJ2234259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c79bdacf1c095f4cd4cc4de448a98b4f19b92cd6ff074b4900f4baa513b40f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/SE62M2191789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f634faaff862ab11ea9c7a7def49fda87fbe46aeaf494ec1f9429f2a63f40d. 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/SE62M2191790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e7b968edbb412d72544880876cd8724d3b03c3e06f840ead3abfa122c35488. 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/USLZJ2234277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccba0da57c7fb857c30ecf32ef7534e10d1f3aea061ae7f74fca7e432dd58d6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:03Z), 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/FR2X42342511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7834817747e434b44de82b2285c61794bc51c7d839e1d9f1f2c26e4d06b28715. 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/QZTV32373043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa975678d4a724bd400541364621a06a3c1e55ad5808cd0d9cd8c8b04d882d70b. 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/QZTBD2411706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a78571f5eb8d275551ef88bd1606f3bce0c2fc77827b75d0d64c0d629417194. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTBD2411708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3558dbb3afffaa646c3f8a36dd6ec13a620912071091198621290c3561ec919. 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/QZTBE2431102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed73d2d6017f18b4f1c5b1251b9667d3e986343d04a10f24b8cc6495fc6cc00. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ782492765.