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 0x8a630af9f4d5f731f2593f2c3c20ce8366f254efc6dc78462a3b398515f930f9. 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/abc2067e-429a-4c50-8d69-ea1a2d4c2505.json and https://artists.proofprofile.net/proofs/artist/abc2067e-429a-4c50-8d69-ea1a2d4c2505.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 0xd5db23c709fb3b07887b64981158a85229446482cd8be8b31d22d984bca67c86. 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/USHM21184730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf539a70381c408f611795d4134b27bfb25b3982261a0510d858d4d252f52fe43. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM21184733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557c7c3dbc3ea63b80cdd28fe16415dc8f6234c6a8091a04fbd9f7fc6642f65c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:58Z), 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/USHM21184734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106dbeaa23930b453147f0ff7f7335a5e086f3f7bd9f0c978ef321b74f23583b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM21184735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0441c6193ab87b5d6ecf5ecbd221c949d2867902b7e487575c541f81b5b83f19. 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/USHM21184736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15579e1ea2f190cfb8b320c61b148c0133e3363f409497e69e22dcbb15e4ae9d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM21184738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de81dd1e6e9c41b048255ca38b2ac985d24664a7f5da5c2997a6483a2002a5f. 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/USHM21184739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed8932168ba1b4e8ddd983e9db79cf1e960d297736c0ebd433b23002cb967a0. 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/USL4Q1777364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6bbb657174954e0d5c16d8d6be87051af222b182ef500018425b08d1d5c19. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USL4Q1777366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30c753ada87533239c1d1975ac3b07e943baa0a69fad05b1de84f7d379dc723. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USL4Q1777367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00c8606bdbd475456b32e2aac756e4614012796589793966b92338acd119519. 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/USL4Q1777368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf2894c7acbd7c4fc5d847a95a1607eef41256c469db141c11fb2dd78751ded. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:40:43Z), 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/USL4Q1777369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954e656f573b1b188df6c23551ce7ca32137d368bf2b0e32d8e2870add43c60f. 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/USL4Q1777370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33e6d8cc4ed79b4a52128a1efd360a282e88f037caced4e97ddda4d17ea23dc. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USL4Q1777371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2d7780cc5edc417e39e0f8f71cf14b51b8720258c50cac4745ebc7da31b7b6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USL4Q1777372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d29bf2d52a4eaf16bdf3aa17653797af43ba3e586fbc8e992fc7e577b7b8efe. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USL4Q1777373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a51754a1d93c15dd14060613a05cc00e8269be02a4e93ad7bc0b4a448d7aa56. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q1777374.