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 0xe3ca2468ba92045709d3a1ebc60489f78870157b16b5db7b98db2bb862d42190. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/998cd2ca-357a-4a28-a594-ab22f6154a17.json and https://artists.proofprofile.net/proofs/artist/998cd2ca-357a-4a28-a594-ab22f6154a17.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 0x8e3d35821436e3b7472288faeec6eb6c8e9fe7e5a888d3ef865592576fd3e09a. 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/ESA011716200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5ec7c6b5f3517d5541ebada03e0c952d71ee54873ad28062eea654252728f6. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ESA011716201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2e07bcc9a5fa149981d8a64ef6091506d26ee2979e3f05c9d7ddbd8bc00e72. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/ESA011716092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d94554fd134bfff81050b23716aa0b6bfce2743369c3b78a351057b24e21ed. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ESA011716093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67fea85df46dc8564f2d2b29e2298f0747a9b864003612d278c0fcbc8b5cc4f. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/ESA011716094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbf3e9cf742edd492f17c8a078e6ed7b3e9b0b2eb3c484541b135348d616034. 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/ESA011716095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6883eda4f2530ab0b6197079ef5a72e849e6f4dd9d94e1d2dee523a05c97c3. 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/ESA011716096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438df406d0d9709104476dab9aeeeec0a4ded2837fe67e94f1d98d48a4bc72a5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:14Z), 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/ESA011716097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170a557df523253ad6b005e60f692777c7f4ed6edd02648a9f9a9ddd1287175d. 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/ESA011716098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e676fd3cec66f1bf61dd57237946e070c390bd1bc3c06f9283696f1e964b76f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:44:38Z), 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/ESA011716099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b3034cc3d148a0db7adc5a2791271beea01a6243836b0fe324453da505cb7b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:52:24Z), 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/ESA011716100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ff7af419a837826b0944cd21723a986edd05e6ee8a623386b0961f97cfd12f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:48Z), 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/ESA011716152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3125adfe38fb3ae69f1493aee3f90c3515e32b100586befe576255c9b06395ea. 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/ESA011716153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a87dadc2663e82f317a3650b71582367d73e2913824a04ed6612d1d1cf5489. 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/ESA011716154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa656c26e854db0b241dfb180dfcb9b9a8ecbb0e13b6528849ff5eb814e8d7fd0. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/ESA011716155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcba5de0dabf318e04e8695e57dd7317c4f0e5efba472b2dc9f93ffe324eff6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ESA011716157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1942b2db16a0b763906297e9b42c121900f10d923a8c1d7cb414e0f6078ebe2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ESA011716158.