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 0xa9f573fb043a24fd254a7a06642e2f571a22e63048c7d1e8d98620d9de689329. 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/d0d62695-6fb8-4c45-b210-e913d93dbe7f.json and https://artists.proofprofile.net/proofs/artist/d0d62695-6fb8-4c45-b210-e913d93dbe7f.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 0xb83f678806c7470ba4022cdf259e0b8911b2b845a2f7c8ee8743faf2b622ecaf. 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/CH7812225038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75c93cbab9d70630f31e7bb0e6ed715f5e528775a6a7804afcde28f8a7266e4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/CH7812229241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83f678806c7470ba4022cdf259e0b8911b2b845a2f7c8ee8743faf2b622ecaf. 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/CH7812225038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e682d72a02a25638b12827dc0604266ad52aa5d576f78a06a622f8849632c0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:42Z), 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/CH7812230810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75c93cbab9d70630f31e7bb0e6ed715f5e528775a6a7804afcde28f8a7266e4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CH7812229241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfd8f229c072413a7abd37edb6d4a9bef4d6c853ca17d93341309bee7e6516f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:01:01Z), 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/CH7812237328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca7d58c3543f81de28ea87730b5d474f150210f76ae7319fc3d9a69d8d3a18. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CH7812348298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b2094b9943e0c7a755bedee8578ef2fdc6583f98923009706c119f28e86a2b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CH7812350749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd517baac54268ddac17290f2fa1b934c731d8088810c9d76c862885f6f97324a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH7812349581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074a870a6d6f9747d3428525ae35231ff4834a6037667720b453bc44ed08871a. 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/CH7812233191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadbc7815b15fabdad1cfc4e9eeb9b76d0f499b6bb1978cc7aec5798144f00d8. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/CH7812357537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415a142a969640c137d0937e1763fd996c45dd223830279d0356353b1b898052. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CH7812402270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909dca89c698d81843527e5b5320cf24d6f8a8705157ca1ace8317765e0734cd. 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/CH7812538057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6633d9832bc656ab3286f791c843065f71bfd18f330823ae75ee866cf57bf3. 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/CH7812538058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7b097274da1785e6d99a04996a76e22e2baa2399623791cf448fe8f98abe44. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:01:48Z), 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/CH7812538059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f94d05c0d6aea8fe793f0dd0b5e06d1bed26300bb207c15f3fcfccf323e06eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7812538061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456bb267e909c63193c7d51bbf08b3bf054ef3416b5569c2a802f3c2b50e9584. 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/CH7812538062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5967de22a7f206e03c5a649df34182e0e9893ef3d4a55c3ea37cc6eba0b98476. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:47:33Z), 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/CH7812538063.