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 0x0d6bffb867fdc60c7bca211f678f34542edf5268a8bc5349e0d5b770d76c0648. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/822adc6a-c368-482f-aefa-f9bed301023d.json and https://artists.proofprofile.net/proofs/artist/822adc6a-c368-482f-aefa-f9bed301023d.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 0x8ef8476f1ec6442b589d0a73947f16d78101a7c4b1ab89019f8ff34e2af3dbe2. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CAHQJ2443780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6343cc0582fe5481b8eb6d44355c56fcfcddb8d911020c3aae7f93fa53286e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:22:59Z), 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/CALVP2475568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e754c6d12ebc8f59506bdcff36bfbadf0365e53031408ee76debf559dc12f17. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/CBEYJ2425491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e45c4c928818a94d746f733c9966ffeb3a9dfb9bc34de6af605fec7203b822. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CBEYJ2467263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d1977e8154d63c1179026b925f2bd1c8e84ac952ecc16d0b55352353fe9b65. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CBF8B2442911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e48fcd415a7ea75f9ddf118fd6b3332cf0ca9249d1c56632cb3b9810d0817b. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:55Z), 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/CAHQJ2521151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6de844d760ba134fc7b9f235e678dfa16ad5cb7acaeb44b8e9d944264966d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CAHQJ2561339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818334547ab8ab53f7473a11c0bf194a3d70236f64096fbb3707852cca12f757. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:01Z), 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/CACWV2528565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc272ad4e280dd8d781e7037420b166d57ae776b4843c9f1d2c39e92254ef2a12. 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/CAGOO2544341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75cdb8fbeba53962c51245646051b7519f3e7caef71bfb0475966944a9e0280. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CBF8B2522740.