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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a0b4705380c264ddf6148585920248e20b9dda165dcff18d964cc2008c56d. 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/52d022c0-642f-4425-8a52-a80b848ec905.json and https://artists.proofprofile.net/proofs/artist/52d022c0-642f-4425-8a52-a80b848ec905.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53eabea695101e4f3ac3010cb08335c7d8247183d78ac431f0fd0835d6aef59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2432936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d75895690e4a5c622b0e018fabf1c8e2bf69dca364274431b98f6cd3a5b731. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBK6Y2422701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa852fb197bbab8f6240454f77599cf20b2e55c6dd02faa86c894f3e2cf5949. 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/GBK6Y2422702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d3f4630fa4743e9ed488bd33cda48e7ff201824a61d4387b58342931c02dd7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBK6Y2422703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d881fc261cb68c5a738daa3d1fa2852a3e1ead9e044264cd34da9de6f486478. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBK6Y2422704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54c9373dd3a8cc8765cc9614fc26d93bd123e106c696b0052fb4de4aa85a640. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXG9S2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d0b0875f78b4edee9ce5f97397fd183c6088a20426539b13758d94eb1abea1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2432487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1957acea50ccf4eca3130053962b2884dd4b780987fe5c38eebcdc284787183. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2398284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84c5f6dfe266c84d8b95e7bb36ff9ba43b84d78a729c01d943def3f9cf2ded3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2396685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fff98192d06f806da4003a2ed96700a0824746444dc2d872e44bd12c4bba690. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2289182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cae24aeddd17da26a40c02d9fe7515a16890aaf735e2fafcc07b1e1af73bec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2286551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9ff0f3e22b5057d5c6a579c4ac0bda1f53c119d1c67a2ea30240f5d47d9d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2226958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34f3e3ef1520a340fe0f902bbe96f256764b7d613bded8d997be1f104b241ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2200472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ca09e09922875212985f886864a28e5ea6dccaf2b41a1263e0d8fac7401ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAOOX2500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b722d63c195c5cd1e80bc5ee16bf525ed84b67cabefa726dce4d3d77d024c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2511654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22005bf81e78c903de138b4f5271feaa424027d19ab460704f1fce43402287ca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2511655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0374e1646264c04feea03b5e9ff7d8f6c069d153fa865942f5ed85624962ab1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62409064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76f261313f72e24a8281423e59a6c4dfb8938e8b187b4996a9aba85de547f3a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62409065.