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 0x4e2c469757964303c647bca78e1fa3dc46d4dfbb3a723bcd8e8c5d64fabd671a. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06562ec1-69f0-4882-8988-d10f34fc3633.json and https://artists.proofprofile.net/proofs/artist/06562ec1-69f0-4882-8988-d10f34fc3633.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 0xd1a66e15fb6a7495129aaedb2cd664e3bcd59587b0b73af26bd249db381fe1a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ8LD1994950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef81d526a11430c8ef7c024e30b3fb89b2d0876b4e0bbf987bddeaf5ee59e19. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ8LD1994952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc87d458a7a8f96f4f94a0699b56e361465dab3538d33c53b9e09a528d1bf3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ8LD1994954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff0853eab885c9d524815c21631553b34cdeb5914cf6e4b8b150286bff08a7b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ71978535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d6d01f0e9799ff4ac2fe2c185efa7802f250926939ee08d4f0b123f250db7f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYZ1919525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4414eb966c82ad1111d7eca9e0a589646f63b4671a71334a53dbd86d634c44d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1861567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169dbc99d8e3299ac3d569b18aaac8f9c94b061ad9a8ec1258f6eeb753b2b07a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEJ1959036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6e8faedf37aac0effd993c5d12ace44b1da3056fbbcdb2aef42705daeb94cc. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCAEJ1959043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd11f144d8df548834d1aec85b11b62bf14d7b34f061a453f49a535c47b157c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAEJ1959062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55af021824266cbcbf5717abcd3aa4ef86e2922b27382c6bf189d697eceaac8e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEJ1959069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cf1027f7d6d8d021f1332766a48ab9ba74b38443bac9d636e60dd9ff346c0a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCAEJ1959073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae795ee506c07e6d7d035c53331a45c265c836c56a0e43048c639e652fe637. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEJ1959090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa202207ca9f686193cb78fe3a5b988e24c937533ad88ae0065d53b8d4c87edc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAEJ1959093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb889a639c23896152bceb1bd1b809b01b9abfc2c818454e176865cf0f72526. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCAEJ1959101.