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 0xb41a627c4824c6e9b094d4ed167e486ff515dedb7dda1cfa09258d38a4d7a754. 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/adbe5a56-a42b-424d-afd9-4b87a5a4ae85.json and https://artists.proofprofile.net/proofs/artist/adbe5a56-a42b-424d-afd9-4b87a5a4ae85.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 0xfa4c33cc438999ce88b5818113a3eb3980fe0b242e58331e9972bbed5580b16a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:18Z), 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/GBRKQ2499303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbb05b8da11fdbec0ead89f46dddf2d3dd16f6e68ddc8fc161222e8426f888d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:20:43Z), 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/GBRKQ2499304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96cf8512c0904e9e817b59608077fe7c3ff50c3ce631843588cb0b85da7e1d9. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBRKQ2499312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2dfeb8bdf00603ae8efdc05024dae36aa272bdc749e97ed01160e29c32da0f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBRKQ2499313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a7c742b13a192e4cc4663ef531e99559ef6f47145dfc2f071249da78cf54d. 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/GBRKQ2499314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a61c6198670f31d3cc970391ea43aa1970265724eb6b277a6b038d7f3a9a139. 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/GBRKQ2499315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f4a2e8ab6a660f9ad5f9419c49fcc1c5ce58995a5c1c9592b7a60015a4fa7c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:34:35Z), 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/GBRKQ2499316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71996c6e684dda6fc5cf0c026fa3bee55457a4bca2a4da9d10a647653942270e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:56Z), 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/GBRKQ2499317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20164d620d5d2f23f30eec131e4e2406883c9c0a2f8b5c6cc0e29dabb68a37e9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:30:45Z), 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/GBRKQ2499320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427d210ec12bfd77edf9fe68e7f2f4ebe60f139bbb5d45949a5ec9cc9183aa28. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:50Z), 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/GBRKQ2499321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a4ae4421faed83f8577da923dc1a5f2e417f7455c7ba687e0333c9561d3d02. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBRKQ2499323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9f7c4f4e569715a8b3dce2852dc64d3c153e0957505c216a71154ae5de0bea. 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/GBRKQ2499324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed53f7b3990caf3e257fb3195d34b7da31746990935d44aa765bc84c7d341da. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBRKQ2499325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e5681ffe5b5c50102a77b38a1fcd0d741e24a4703dc6ac863cb817cbcb5f4d. 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/GBRKQ2499328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad008dcc318e4fab227ecd4fe33bd009150b87bf570513b25346f3748ff44f7. 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/GBRKQ2499329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b31c088152fb4cfcbaa818051dbe5c66b7a67c48e5e6c191163f698df5edf44. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBRKQ2499331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d4d63ace009eb81dcaee55da2c21b6eede7f9c47573b6934f3db1bddfbc0ab. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBRKQ2499332.