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 0x50d6ec982d60930798379ae76a4766e155a7503d6753dffa1e0573e2e990608c. 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/2fb3e4f0-e9c7-4dda-88cd-6ba9815bf303.json and https://artists.proofprofile.net/proofs/artist/2fb3e4f0-e9c7-4dda-88cd-6ba9815bf303.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 0xbae376866ea95a541e8cd12087811da9bf08e01328a3270607936db80e571444. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:27Z), 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/MXA3V2418347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32383cce5d93ed1156224bf22d3f3d4570a900f3b6f2b2f95d4d10e19d45259. 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/MXA3V2418348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e7e883373d2cb0c5c81019ce7c10380d86348346a415d020db30e10de5c18a. 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/MXA3V2418346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b6f12054d364c89e0d9bc03b3ad53cd11ff00ea77b4779a0cb17169f48d70. 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/MXA3V2418350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06ee9bd64b3f8e52642b140f33d89581ec7d7039abbac730dcb5ca6e030e975. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/MXA3V2418444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c08bd633ee2f0245daaf4f73fed64f8501a6aba6a09ca9a5a1449cb0bda05f2. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/MXA3V2418446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452ea93a62835da86116bef06dea8eaf64c0b93bb5e2e5aec3ea482eb8bd20cb. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/MXA3V2418447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d6cf184348b9dd8ee52189e6b1321dda3321b68c5f88c0faac0ccbf43fbb37. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/MXA3V2418445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748ea72e3d8b848d6fee00827438081100b099bb066665f77e98032660e3db43. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:52:51Z), 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/MXA3V2418458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115001c3b6a2687f11231fa95fbc3944a0cf5d899542ad5a16d26b5c97619b5a. 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/MXA3V2418454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1aa0f49e9176d1cdbcba1d78dbfe1a5df039612e217ecaea9873d17fe3e395. 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/MXA3V2418457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76c239834d08282473a40fedfdd5035a6f1434b1bf1aedfb7677dcd2afb0c3e. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:00Z), 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/MXA3V2418558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc290f82def1584a71437b0f2465cc68502f22e81f30c19c75d51b50adb0e854. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/MXA3V2418557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a17f110227ca413971b4097d23f607906fb1d4441d7cf835f6c0f686bb98f7. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:21:05Z), 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/MXA3V2418561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2db3a7778390b59d71165f2210b16076587d524a262a5ad5ceab591e2b7306. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MXA3V2418564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b93cedfb7b55859ac5bf9bbebbabe230b1695bf25539f43832ad78fe0625ad7. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/MXA3V2418562.