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 0x725607d3936a09234e679548901ae0bc626ca59b224f3076d1ca767310d38355. 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/76ecc63b-58d0-4a12-b8bd-054fcb83a45c.json and https://artists.proofprofile.net/proofs/artist/76ecc63b-58d0-4a12-b8bd-054fcb83a45c.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 0xb1c199d138bc7e2cf7ac1024277a3643386c65a410cf4aa2032a06cd5fe67dcc. 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/USL4Q2312307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9b11584e4b87a9aeb7584a45e07465e368e122cf6e505452e7e58d818e72e3. 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/USMH92341467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5fda1aa358ab138e014c1a1f243804d851fa5bd9f70929b118a3d12ddc716a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMH92341101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95833ca78c791b05ea6507aab11ec4bf7bb878f4916eb0194d2310dff43ccf3. 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/USHM82368366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41f8548a715380344d420ddc08005d4377215a5139590fe5761a7bb4be4db2a. 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/USHM22309990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d311da13e9adf385a174119093ba851a134dc90e0d9287847d2d08a498ce7ff. 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/USCGJ2346719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1135016a8e155f5f97b4198ea0927960e591dd25eeb22978c250b8af4c43d1f. 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/USHM82293038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36e2f12a7d2b07697e3a39466dd547df6b28ffa564df13f89f2d1a6631dbc25. 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/USHM22247076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b668ec0a550ac70197aef829af5cf7fcd19d03be671d96dbd426070c2079b9. 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/USDY42266056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d963195dcf5aa37150853f9b390d500d2c8edb02c7a5297da43f0c95dbef9f. 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/USDY42235359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a422ccc7fd9211cffb49afff706c96175f0f974c696f1ead874eb53f5c2cc5b. 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/USHM22247050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd5c3a697ed41265887d58ba8a0ed740e8507826f394bdd393badf787f1dd41. 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/USDY42266081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c4f556819fdc650818931c614ab5b21db6a23354e572784fa3565edac8dd9b. 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/USDY42259916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dac11b51732abe7881fb941a4015e60dfa984149da70fcda890a840f88ab87. 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/USDY42259920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc58ac9cd78a5c2d0df14c1d8c4528779c9cdbd47c3e298ac4e186a86da523a3. 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/USDY42259917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642ec68276701ca78c9aa72a379e573810265b7441d9af2577cd84279699695a. 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/USDY42235351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887ba748b5f16437fa4f8b6d513f434285bd13f7343e1e708d9676234434dd46. 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/USDY42259918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d814e3b87428e5282f6dc269d0e18ef2ef6c1071687aee18ef51b825215845. 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/USDY42235357.