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 0x9c27db63a96c2ba6c20d09a874a75674715864c0c8826f8cd7808b6278947859. 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/4619811f-9ebf-49ef-b2bd-2e5c52fba00f.json and https://artists.proofprofile.net/proofs/artist/4619811f-9ebf-49ef-b2bd-2e5c52fba00f.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 0x16fbfdcfd2c8089b714fda61f4c9dbe7e0215bdcdd65f473cdb643c6ff12be20. 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/INA092407228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16ca59d8fba08e9e14fb440eeec8e00c6d5ff1475f12bf485cf49dce1708d35. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INA092307189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeb1a40e456f4523271173086a347ca1fe7a16df19d61c9a2b7fbbf761b5dce. 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/INA092307177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96760798c4942e513cf115ffc2f8296e010628608e2540b9e15324361d6d4968. 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/INA092307172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ecb151598944adbf6c1093ec8b5df11319e6ec6a03c0366c8905d17fec89a4. 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/INA092307158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf651ae89e1021d41659f3e93f4671603bf3b57e57a340000829d989bedfc11. 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/INA092307163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfea548eaf0c27b371b48522927c16586e2dec3eaf9af589721b39c55c09907. 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/INA092307143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db5d6085adecc3687172f59f0533a457d2fa874ad55a63707cf1d4a9ca8f658. 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/INM432400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb1d6a8c90cdd6ec3a3083502cce121200a6c56502f0940f6115b43a20e8d5a. 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/INM432400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36301e2cbbbd042e7b9f9da82d9873ecc73e46c37277a45cb830e56f253c77ff. 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/INM432400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693ff4a390d62a2d462285145f4d31283576172a111c9fd3f98ea86785ff827b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/INA092307124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3066df08185caade86b72377fa3a3b3f97bc7203442c2ea725c418c95fa73a4. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/INA092319094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a668018959fdcf22f3249aa0beea7e1cbbae6007bfcb974525acd612dd191e4. 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/INA092319088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7993e60c956509b87a1814604f3a0981636ebc9c721076d3d50431962e3fcf4. 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/INA092319079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05561f9ab7f56510e208cdfe51a550a7580132d0221ff8918173d83d5e699d4e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/INA092319076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1e18c5ca937914edf23923f97f06fd6bffc439532a37dc7d22fc81da91ed58. 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/INM432300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21368eadab28fd57b806a6033e272a4867d1f2645386c76ee3ad756686efb400. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INM432300206.