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 0x1f5a19f93184d66263df71b3dd51a88080c0c86df6c48ed1d2a6f7e72adabc7d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1f4fdbe-ac9a-41a0-b17d-ff9954ae084a.json and https://artists.proofprofile.net/proofs/artist/a1f4fdbe-ac9a-41a0-b17d-ff9954ae084a.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 0x1ab6bccefde5c6487919d8e264635cef1d3aa9b67980e4b5aa564f60e88192c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BEO632100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9921ba3a876c91750f0af55c76063e26e99b48251c9dd4ff6056b313b0775c06. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BEO632100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1963ad8fdd278085cd8baacac096ea082cd171be72e5f738ee8ea13c47143c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BEO632100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3c0eeae3faa2832a09b72fa3249528bbd44a10b5cc3b243ff639cb590b2378. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEO632100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c9704f13c6482adae0620cad1e7e5d461bc1870858af176d5ca959124800d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BEO631900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b142a8716284f4409307d91947b5a8250de1c1625430bb19edc64b1d258c883. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCADN1856173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2d115bb2634f347b3d93f751f707a99940becd32f16f02c07422c3b977e9cb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BE0631700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaa64763e7aa0251eb930cf2a6b888542502da7630de92ac30768dc5530177f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEO631700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aebf1a0169a7813615bebec82793051ab1fb0242c6e88d4403c3dab16043d68. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEK1986347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f6e32f7a62e2d419325485d70c0b1de05e263503ee393ac857667619571a5f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAEK1986353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c76536f1e63e8b26dc47928066387165b124344d46f5ab6ff18f7c879de2d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEO632100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9921ba3a876c91750f0af55c76063e26e99b48251c9dd4ff6056b313b0775c06. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BEO632100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c9704f13c6482adae0620cad1e7e5d461bc1870858af176d5ca959124800d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEO631900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a86cdf6a24e5e7e37f2825a926844092640a6de5b35506c6ffc8c2c912d78dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEI261800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6315988580dc8474f587d54cac71da1993cffcb9512700c2684e85f368167f. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NLZ541800701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b8f629129851887ab245f7af822262b349ec98728a98523282698d3be160b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEK240800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4194f635433b35ab0b291648780fbe1a16865edfe7b09358ab03a9e32eb7a4d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEK010801132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1051e461f51d37db2f67880f542afb3066ddadc72a2fb89a6ace5e6f9fd31cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BEK240610005.