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 0x70dc0c28651110bb848f1f78c0fb73cb50808e39ba401dcaf9d79686fa57515b. 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/abd0c962-582a-4396-ac84-1ed0465345f9.json and https://artists.proofprofile.net/proofs/artist/abd0c962-582a-4396-ac84-1ed0465345f9.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 0x35feab7d06cd34ca0e80aa443cce749017a06fb08abde4f01a51e4591e8fc950. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAENV1703408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60e0cca07179eed2d84dfb8f4687d256b17ba329a7de2ca701fdb5245e7e369. 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/CAENV1703409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bcdbac04a0ad97099356ffe779942ce294e954ab67605efea8077aa7653580. 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/CALVP1955049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e905601598a5a378201b921d7bee01f30dd5dae336bdad5f9015a852a40e8db. 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/CALVP1955046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa619951dbf1dcca765d3e6f0c0b4a65691d65ba07b2237b1271997b5f295143c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CACWV2080693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436f9a9500a2f96d34091649fd1f23319312f1e54525ad4be089ae890f412b4c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CAENV2280526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f84a79ad6d837bf5f778855e6760385b674830c1b9d5a292ce7017ecb93e824. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAGOO2497088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b59fd5c8831f9a3425e3e4294a40126a4a1f378be4913b7e3625a01cedf64e7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAG002497092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9e2f12baecc56135cf17e5c654f9964fa7b2e5c996ab68443261678039477c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CAGOO2497091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b59fd5c8831f9a3425e3e4294a40126a4a1f378be4913b7e3625a01cedf64e7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CAG002497092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c2be83dbdc0bf5dfd58dda74382a58e012da8c54ba03e1aa0e21be5ee89a01. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAG002497090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682935dd4682f77ba1ef9fdce0650ec1a8e4ed0bbde74acc70ab5c88608943d3. 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/CAG002497083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e30042cd4471860cf112d19879caca60bd15f85f35dcf848058e6089cce91f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CAG002497085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d810daae02866801830e88c9745e35b0a8baeddc51484fd1e3c16e96dda782. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAG002497087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2907c3908e8238700d2156672d2049d728e9833242c635cb324b962c5cf6696a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAG002497094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ac2b54aba7d0620ea186c676e68221074cf249387ee4a5de43e0c2cb82e472. 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/CAG002497095.