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 0xff46ecfc95d862ffc98bff789966b5b3c25624c81a3b72843f175d603017aa95. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc4899f4-9f66-4ef9-9886-a9a518d2bfb6.json and https://artists.proofprofile.net/proofs/artist/dc4899f4-9f66-4ef9-9886-a9a518d2bfb6.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 0xa650ab63fc6e46df1e3adfa52412bb94222866d7a771246b1823fd215bb97ea7. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:31Z), 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/CL1251806001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa7aa4c0101ab22adae678a1517327d3b851ed4834a3c0a4d1e5ae8d13c1e0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CL1251907401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9189594ad1e9a1411a9c1c2400cf6e14c6615606466a1dc7f52ecccb865a6f3. 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/USHM91920933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa650ab63fc6e46df1e3adfa52412bb94222866d7a771246b1823fd215bb97ea7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CL1251806001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e8d3c438ba91a81ce74102aadfba156cad0297239fd8b8ce50b619dbd2a06e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CL1251906801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa7aa4c0101ab22adae678a1517327d3b851ed4834a3c0a4d1e5ae8d13c1e0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CL1251907401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4094024cb3f8561bc0d4bf20654b750eb6efddcbebc8d794c417f4bad2962d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CL1251907301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d55dcbe4774ca5fa038308c6b8905d6e650798ec15b99e542ccbfb5018ee6b5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CL1252009205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc36bb41a104c3befc44f615558c528e270d454281c10a506d23a44b41c15b3. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/CL1252009206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa7a891b6944c510c6b157bf7f2c579c6c3f5dd4cf163be0d8a1193bf00b83c. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:06Z), 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/CL1252009207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0f34c9f9faeaede5b5018db06882e55fa3e7dd572b47b807f4cdc0a86a19f9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USL4Q2141522.