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 0xc1dba8adb8fa7fce3339339cc9975e1cf70a31f99643fb1610bf7da36d415ba3. 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/50e53ce7-f4de-4553-8ee3-0e3c9addb516.json and https://artists.proofprofile.net/proofs/artist/50e53ce7-f4de-4553-8ee3-0e3c9addb516.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 0x17b72659e2c0bcd2bfc429065fae507c76b15cfe63310673e6e7188fc6dc1b4e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHB51900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50ea4317984d09e50d83305a0ff384bb94e5735a8e98ef30696c70263a7092c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:14Z), 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/QZHB51900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5616a1acaf1ceaab4a7f53259fe9bda83f4307ecc22ade5db2e66eb7399b39. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:50:05Z), 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/US8391900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26b6b292430db27e950f2757c3dd5e4f6440fc72d453e35886c1a128df72adb. 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/US8391900228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e672972f9d74ae60849d72793ec8240fcc759a04880e4150d46256521d7b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US8391900229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e4a32c0c00e0d2c0750113a88e214608ae3a590b33d07703f3417533a89140. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US8392100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc114ba98d55ef4ba3f8d9c050227b2e1ff35dedb561f3c9543df63a6bad5ee. 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/US8392100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445cd52210a8bb8b5f6f950c98f2814fb136c4c90bb8e104d5dffde42238028b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:55:27Z), 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/US8392100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83049f0d9ad6db1fea6414b7289b04159f1bca908a71e5c056075213a15b3f7. 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/US8392100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051ddcaa60d132b44eabdb812c1fd057d70cdc53571ae179852dbb7900de2087. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:46:43Z), 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/US8392100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d211421dd88a00e551fe4243df88e46e6858309108f53d8e5ca9fff05b28714. 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/US8392200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113b698bdd693eee0704cb6ee3e0694d3ec6f9fd8d684e7b4d25122753f0a905. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:44:44Z), 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/US8392100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b286e102b2aa43f1903e910b7609d339ced9aa0f2d883a53d0dbc7b7b789f01. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USA2B2319774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f830d826a1f0416ee5a7221bd691641700a1f098edce85da9cfcca0c26caf1. 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/USA2B2320455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a61b3d12e946fb8883613b5962d0eb00eeaa4c9889bf489e384b2d1f58b184e. 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/USA2B2400697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe80f973c809fe46d95d871e8d052d3917088a78e715bc3fb612abb7507f61a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2B2403655.