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 0xb1c51a5015733e49ffd4a85ac4739cd4fa64e7f5bfa8297e9bd88763786c29d5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7772246c-460c-4579-9b3d-1d39c9457eea.json and https://artists.proofprofile.net/proofs/artist/7772246c-460c-4579-9b3d-1d39c9457eea.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 0xb08ee63d5381209abc77cf400287812bb0c6bd0684d5e6e8c82f70e9322fd764. 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/NL3CC2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c55039fda9af700325541fb144f52a5e03ddbbdf018c85a76f49cbe8077fdff. 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/NL3CC2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf0c2770e79ba2241eb67ac8b7b83ae0c70b1f98ceb2cec2905c3738121923f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL3CC2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c55039fda9af700325541fb144f52a5e03ddbbdf018c85a76f49cbe8077fdff. 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/NL3CC2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08ee63d5381209abc77cf400287812bb0c6bd0684d5e6e8c82f70e9322fd764. 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/NL3CC2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef280f8306a6941a5f713b772428c068fd79aebcd702bcc43c3089936b3cc556. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:50:27Z), 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/NL3CC2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5233c45ee27036da9561b05b97760d1122fbc5e27c8ab6329d538d3c0c18556. 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/NL3CC2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69a0c99a6a5a6cadf2d48416a4d480ebb21e9d6aed9cfbeb23e5e6e49a9d413. 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/NL3CC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5233c45ee27036da9561b05b97760d1122fbc5e27c8ab6329d538d3c0c18556. 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/NL3CC2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77a1fd7aa667ab9e54e9f23ed9af8832a943cc2193ffa1ce1b9b936109741ed. 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/NL3CC2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69a0c99a6a5a6cadf2d48416a4d480ebb21e9d6aed9cfbeb23e5e6e49a9d413. 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/NL3CC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1766464d7ee7a327e2105adaf6bbf2dc98193bc8263a25c932693d41fd3b90. 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/NL3CC2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb453e8170c70382a2cd96e9709ef0c98f82cfcdfb20c69f101bc7c3a6f20f24. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:48:49Z), 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/NLSB72500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d881dc98efe8a0a0c72dfe3288d7f0a2fbf7819f88b29bc49af52437265655. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NL3CC2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3e7254752d34c24ad372dde0033969f6e4b1a73521e63eda98a00ddd06b80. 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/NL3CC2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb453e8170c70382a2cd96e9709ef0c98f82cfcdfb20c69f101bc7c3a6f20f24. 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/NLSB72500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d881dc98efe8a0a0c72dfe3288d7f0a2fbf7819f88b29bc49af52437265655. 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/NL3CC2400024.