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 0xf73e13a952fea35bce201281131f3872357f204a9d501f4195d40872c2981b56. 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/2b4012f0-c0c5-4542-9718-a0eacd25c5f3.json and https://artists.proofprofile.net/proofs/artist/2b4012f0-c0c5-4542-9718-a0eacd25c5f3.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 0x07160853038f9e10371660cefecc4f89581f71f39e1a4aad74a3511088db0014. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZHN31912564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395fa2821c3b5eb3f885a8f23d2db8eb611af633e4d76d7ffc68835b29b00528. 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/QZHN31912562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728fee9733f997bdeca31e25876b86f1a5c5dc91654b48ee5dd30f15ea80dfe8. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHN51973112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b98ee8a395fc92abd54e230611ed38502470fabdf296c94258ca5f430b3adbc. 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/QZHN31911531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef1edbfc423f6dcb1148572a504a70f30b53a3dd660ce137d9b05d0f7bf46f4. 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/QZHN31903913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e9a68e258f1b27d7e51063788bc3bde0109855a0d9e5c6d0d734588485606d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYY2012812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc3e1514233647f599fc4417a9dd7a051a1427e555d9e5046e6650328e59785. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:08:04Z), 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/QZFYY2063633.
Without You I Feel Like I'm Nothing, but That's Okay.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef20d2d63078053d31dc364d01d03ea782012e9b3bd6b8fb1b56629fd5b9ab. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QM42K2067324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9233df09d1a9138585f95959fe93056137e9507246354780ab63046a7ce823. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:21:45Z), 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/QZHN42029532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540176d1a67b0a5ac358ea3f17c4997935876042bd5b186fecff149edb1d4ec0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMHK2048651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e68b2d55918c9afd0b628c0515b02ec450fad51f4088844d6782753be828a. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZMHM2091070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31925b64cc53f381b861149bd8e8ff3a3ce9cc267e9a024d0e2abd8629748e7c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZKDK2120501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136e047e03e7f8b8e814db82af24751e971a87db41b9d24f4806b085f50c5a5d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMHK2079412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39921de278ee2eeeda18bfee91c508829c0936590074c7c4e1e1de192ba07e79. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:30Z), 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/QZMHK2072818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d73fff9fd1d66a66e94e1cdfe2cd77678ba9f5cb52e3e53e6113a782e51aed1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMHN2263345.