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 0x4db25cb497c2a19d882b87570698ea495f7ef3cea965001160d32fdab8ca1d77. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22803ad3-2920-46fe-97ce-6b802e7dc581.json and https://artists.proofprofile.net/proofs/artist/22803ad3-2920-46fe-97ce-6b802e7dc581.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 0x369bc923941ed31d27194d681163bb83b4c61e49a57c6279f1875e4b460d9b1a. 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/ITZD31400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74254b013a7240423a8362e43bc35d6161322f1a98d6e994ed56c3fd2e9b8c8. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ITZD31400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3683a33f3c56125c0016ba2522a2d3e7d1b67fd11fda844ede345d58a97811. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/ITZD31400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68fb5721b1d658ad47e13a4cd43ae2752d0624d2000a5c90bdc16cd74f3ec73. 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/ITZD31400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899e8af097711ea1c8bf4c6c8f4bd91ca0246ee8d5cc58aa8218d8ad50fb8a50. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/ITQGW1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f01cc8d7edb2826a91f27ac6eedd33a0e7915db994daf84aaf2e0bff50255c1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:01Z), 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/ITQGW1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14fd8c99d474048f22d7284170d1405e1ab8595aeb464f154323a2b73b0fd2b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ITQGW1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe658c85dc30dd2942c854160da23524b9a8c2d3198c33385491d4b7aee3f695e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ITIWE2100536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a81fa6dd073797178dd13c61d1a5aa775543b9b0abc46a5a7d4e412d2065073. 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/ITIWE2100537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd1c5626a1f036a44ef0f7a72b9fae93e1708fad37423c59e02dd697a0edab5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:06Z), 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/ITIWE2100540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9fe85c0b852ebe4b545f9be1702d23111ce711d07dbd6020a25911d78d501. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITIWE2100541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82779754218f2150c9c5a038b757f3aa2d4464a6f41d321a482de4417479ec9f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITIWE2100543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e57c558d3bf12d559363eb5677539f976f98f1426a6987eac9f5da6f24e6a7d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/US38Y2400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e80df73a6aa97280adfef6d79f076430f9ba65dbeff2307251b5ed13dfc73d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/US38Y2404642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd1496334dc67b222fb13dd13ba45aba086c9999d9a7a7cb8ab2bcf66e45bec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US38Y2410638.