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 0x2d969a5519df5def50323107bb2a092a73f8fec9976e5ba3b9ff1e38d1d7899c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acdecbcf-fc10-4295-96ec-d125ad9c9b73.json and https://artists.proofprofile.net/proofs/artist/acdecbcf-fc10-4295-96ec-d125ad9c9b73.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 0xed9399bfeb0c3904e28c31f35234e8cdc1c2f2ac9c336f8c691793468455c408. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMDA72127601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864f7f2054cf4da33fa8063e7aee9b1568f5c0ce63c6e61e85225ac401549c56. 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/QMDA72127603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ba71019fbf9c9a3e4f18f5d93a3c07359632221589216d03939e0b9d51ba9e. 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/QMDA72127604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9364c4cd4d53de23237787c77dbe09012396321e2e477e4d71089757873116. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QMDA72127605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd1bb3778550aeeed20ff83a9a58d3a452d3b00c42964ae4ba1041331cf4cbe. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMDA72127606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff314008c601c1767df3405ef5afeaa925454b9a16d89bb2f83454b31d6aac09. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QMDA72127607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d05bec20ebfdb7c94e4a1c7b3239af1daee96acc5dd115b6d8cc729b0ca264. 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/DKFD52442106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd531ee7d4dcfe316d23bad12f8257c7dfd061084d320fd7872bae5cc4b03b0f4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMDA72127611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b111d078c495a05787915ddda433e515a7ca134eff85ffce4836eb57bced5f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DKFD52442104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d05bec20ebfdb7c94e4a1c7b3239af1daee96acc5dd115b6d8cc729b0ca264. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DKFD52442106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c36c42ca67df491d07a748f04900af96533bd4b4f203141d464034120ebd4. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/DKFD52442107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa131842e652f1076c61bb492209885151f92b9da923cdc59f23531c2f967799f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:18:05Z), 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/DKFD52442108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e4ab15cd3d45ea3e23ef02fc62de643199ca87d73fc697001ddbcdc12bfcbe. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:50:43Z), 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/DKFD52442109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a4d9a693b962f53405f82d669506c3df5352cab369bdcb74543d68f312096b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:43Z), 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/DKFD52442110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3024e99bf0d7f16e5f398115d80fa8ed780c1133fb9d9b79abee50edab7a0e93. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:51:25Z), 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/QM7281932837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec193e5b52a9896c2446fd5b3c19c9ab9501cf81527b565b9418da4b900ded8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:46Z), 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/QMFME1915415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cd1fa89309d4f718a63646266cc6bb4bc166ceb65788e9a5ac1c8154873878. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMFME1915420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a15566cdfc782b2eb946a56629ff5199ef9699af7c37f7fcb3989b313c77498. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QMFME1915425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71977500bd818cd3ae2d7aaba7e4b994ab96a930d0c1a17a4d971be2bcafe78c. 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/QMFME1913634.