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 0xcc55bc283d06bbc5128366d1427d538082711fde336e55f6e97c454498834171. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40b2aabf-2293-4fd5-960e-f6fa61c1c9ed.json and https://artists.proofprofile.net/proofs/artist/40b2aabf-2293-4fd5-960e-f6fa61c1c9ed.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 0xee0d27c264637ad20f11d05c4bdff8a2d8ee2744fec57d04664d0dd8ac234331. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/IL1012201402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ff09b4d40a1e89bdc65c35baaa2e537f5405bce43de5edbcd07b472bdff28. 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/IL1012301361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ff09b4d40a1e89bdc65c35baaa2e537f5405bce43de5edbcd07b472bdff28. 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/IL1012301361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4d3c1210b849aa9c0cec72a5b712144cbbdeede59e73279c26dde87df383e2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:34:37Z), 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/IL1012401292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0d27c264637ad20f11d05c4bdff8a2d8ee2744fec57d04664d0dd8ac234331. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IL1012201402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5159a8ef787b5632809bfd18c4e486b74208bab7e1233825bf3303f7f41234b9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:55Z), 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/IL1012401293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ede2408d5cc8d0faeb26e00850c01d4de9b931327d076b9a454c9dc0839f58. 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/IL1012300527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b3e760c615288e6e7c893927fcc4767427e6f8171e81f43f40289d1f503bd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:55:39Z), 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/IL1012401015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22899742ec19f324797ab9e227ce1d532c4daec070570ecf632aabdfcf1457bb. 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/IL1012400427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe264b4ce097a8fb852e0a012abca1aca3cd8fdce92b0bb0b99b3d9dfa9cad426. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1012500049.