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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdfa56b650cf42ad24423546c4f2cd9e20275179bf02ab47d3aafef35ac09fb. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ba04d82-c5c1-4cc6-aedf-296cf3142683.json and https://artists.proofprofile.net/proofs/artist/5ba04d82-c5c1-4cc6-aedf-296cf3142683.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d5bcde4ebba8126ff613c280d933995fe49968ab8085cdaad93a48dd8594b5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAIS2497287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f9cd1ddb16293cc0ff576c99e505e3c362e04f0a1793a63139fe5ec6b4d09c. 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/TCAIS2497291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a339e15fb01ccfd7579e88a6eb9fdbfe02fa9c2465381c401978fd253ae1338. 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/TCAIS2497294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7759e365a54afbe03d5677e4c2e25336ca94036e7aa01546b703d56e4f7b4dae. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIS2497298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa258351c51d30e258e1b57ee772786b48326e8f0f861205f611d39570b269292. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAIT2497299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5ab5f66aa08b5e51f6fe972f1b891166de4cab7d34a5d3bfc3ce27963dc7f2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAIV2402170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25212a3bd06b3ac0352b67d737ba116c200d1b2f1f55498518fbb71243dfd777. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIU2402173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afc8215463ad91f9a6d7f0098943abd0d2377324bdc456da0f70930efdef82d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAIV2402176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4b63c03edc0d1632a31728edef3a51c26ddcef1ecdc0097378b66eb7aae045. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAIV2402181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cab527ce1a307750701068b2bf9b1d06aa8f6979632fe082d51f46f6d9f3cc. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAIU2402184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d7c7361ba14a4709c14e3e297b3341424e7551f42a4e7db26232a8ed3bccd4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAIU2402186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3328e8ae8574f6fb7f585dec0941d22580f6a6c1ab1a86c3e2edeceb1f82e24. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAIU2402198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deb3a0d5fe8d9e55518cd727138724670b48d2c170537a5df9ff4988cadc97d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAIV2402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c19ad035a700f2f89a201f3ac2890760dee544346d518e55c597aa6a1b7f95. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAIU2402205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919d60fec5a612bcf09153a579a26a506b10250e8287a7c45e3f1ca01458e51b. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAIV2402209.