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 0xaeb6d9577f31b9ab58b1a9bcc671f61dcbb4f9568d9443d41654014067c86433. 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/73d21c10-7003-44b1-96b8-fb60d0391042.json and https://artists.proofprofile.net/proofs/artist/73d21c10-7003-44b1-96b8-fb60d0391042.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 0x3d1cb6ce7d72d6a8f95733976dbf9f5c2f6c8333d506a10f3871090f8228eae7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CASD10500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d12ce6ddc7e24a14c493e34667fdc4a70213b9f79c880f8a99e332afba7ed0e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CASD10500419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f430d19c6f719965f1cd33bdbce46b309cd2fd17a26ff565781ab066b0f631b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CASD10500421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f70b0f5d5b8fc979dbd501f06217964aa8a2dadda5ef596b6fa58f709f0b820. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CASD10500422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb9b740f7964b99b17d91357ce0528f57f438d9759973d453f198c31db8996a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CASD10500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd508564910650d9b5e237e97245e2819d0970492f2a8556dfdf100734e42c75b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CASD10500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd6c0ccc9706a74b211faa6fefc2559c95d1351bccd0a54e8b8671b8fc2df8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:48Z), 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/CASD10500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce953e1688c078066b2c0245ec89e79dac39099076c48e67d5702a80fbd8e2d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CASD10500428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2e55f6aefddc2cb7d0db75cb397a75cb5fac239119197a0c9eb1703d001c42. 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/CASD10500417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1cb6ce7d72d6a8f95733976dbf9f5c2f6c8333d506a10f3871090f8228eae7. 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/CASD10500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d12ce6ddc7e24a14c493e34667fdc4a70213b9f79c880f8a99e332afba7ed0e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CASD10500419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e43bad5f7af40c3141544800a5f8cb80eadbd1b559c2c60573dbbb830b0aef. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:04Z), 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/CASD10500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f430d19c6f719965f1cd33bdbce46b309cd2fd17a26ff565781ab066b0f631b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:41Z), 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/CASD10500421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f70b0f5d5b8fc979dbd501f06217964aa8a2dadda5ef596b6fa58f709f0b820. 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/CASD10500422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893e552a2300845daa02b2b6f39e8c3f7ad3d32f41b2f03e73ec2d40c5039662. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:00:21Z), 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/CASD10500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb9b740f7964b99b17d91357ce0528f57f438d9759973d453f198c31db8996a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CASD10500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ef625e58c8807f9b45d15cb2498e13063a0c844377154b716aa95f171a0b3. 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/CASD10500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd508564910650d9b5e237e97245e2819d0970492f2a8556dfdf100734e42c75b. 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/CASD10500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd6c0ccc9706a74b211faa6fefc2559c95d1351bccd0a54e8b8671b8fc2df8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CASD10500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce953e1688c078066b2c0245ec89e79dac39099076c48e67d5702a80fbd8e2d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CASD10500428.