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 0x60ec3df407539b1bc7d953dd4f559f11c9a7ffa6726554bed86e18c2bd1d0c12. 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/18e1a42e-b0c5-42ab-946d-14484fa17a2a.json and https://artists.proofprofile.net/proofs/artist/18e1a42e-b0c5-42ab-946d-14484fa17a2a.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 0xe32b4c8a5b3b2efe66c6c68739b299e8b071a79219b3d74db35fe9f6034b4a09. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IL1012301448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0cc44fef76cacecc2b0e14587a3cf4ea9428990fc7e7fdb246dd062d6fbdf8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1012301446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae403e7398237794a66844746bbdf866e84c9228ac7cbcc479d0faabde8c47d0. 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/IL1012301447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32b4c8a5b3b2efe66c6c68739b299e8b071a79219b3d74db35fe9f6034b4a09. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1012301448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb4ee42b089ce74fbda8adb11c47004a8f06d3d627c445e8ff66ad5bc469257. 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/IL1012301449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd675052d994d9994a366ae399ba3fc36245da1f3c71165d29cf345a28c4a1df5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1012301450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60196c9d0e033349289aa17adcf8e492aff6b8ef83343e928735e4c49f4adf69. 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/IL1012301451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61fbe24c50a5eb12cd119913ca9abeee2f2bc2882bbaeca016984f0e4a35b2a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1012301452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8341ad0071800662fa9327abe2c9256cf5373c6d7906a4006df43158c4043730. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1012301453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e09407a6f5ad074730177744bfd579786a8a081018e44a765b2dada0d6e60cb. 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/IL1012301454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b27ae40505c6bd44b67fe1c756e1dfcab992cb3449bbe45a2686eb24cb859f5. 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/IL1012301455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2be3886298d23849593a1dc282d707cba887aa0ce8796948eaddee88375dad. 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/IL1042004803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe2379a435aa7111e58a8d72e8d2fb0c1806164736e61d1b61fa329a3926bc2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/IL7112001290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36dfeafaf3c8fb3390c0a07a1ef98d07bfc0c6f9b7ce79c4250220626607618. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1022011331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8bc569b0975901f16fbdf4df57bd7cbe7b1511d2aa5b7126033efbf18dc88c. 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/IL7111900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba79cd8ee02e72f15304942ed66ae2ddf109e775909dfeb697c415566fdd9f27. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1042205408.