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 0x22ac5d6a0d19e9ff46a264a25c3da3ed640b43001cd1c101d8e8bf21ecbcd0b8. 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/9ce152cc-ac27-45d6-a249-cc3b84142b02.json and https://artists.proofprofile.net/proofs/artist/9ce152cc-ac27-45d6-a249-cc3b84142b02.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 0x8a1388dcf0bd51b3ce3049f7a62561200b378f26340458f86b486545d38e153d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USHM81926750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87af6ef1bdf907026dd3cc69a10490bfedb4fbbd92d2972acc1bace2b63f51c8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USHM22002142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c256c6a92c7011b91224f20208239b7ce536e39b0db6de381f82ece0588d17. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/UKYGK2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcf0fced4e7627be9991f831b59b9ed101d4c7561fb620f356e8e05821cca77. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKYGK2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1218c8668aefa6cc04ad0ed654d97abdb8bd797c6aa864776f1337dd2920980c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/UKYGK2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212e0a143c3ce5873e5d291d8775027985cd12cc22c22308c894fc84010f3018. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/UKYGK2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe662f3e6efe57a75a45b9ffdafb3fdb920d345b874fa59d98b7094957cac3577. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/UKYGK2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eadd3cf1752735175bfb83e8b11a85acaa7afaf2a62ee847cecc717adc93c58. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/UKYGK2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b80fa9b8b682564025153f3f0dac60de1b383711196dead3ef91799db9d716. 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/UKYGK2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452f3ee30ab0e65f61e12bc4657ef08a8aaf4586fee39bd5164216ff7a9fa7ad. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKYGK2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959ebdba785ba4c580a872d26a49a33f997e37e2296fcfcbaefe49adb29c7872. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKYGK2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c0d57155faaa4408d984de831ee0a146dbdecae23577de6de4ce169cea5a54. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/UKYGK2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a18d42b70c0bddba1daf791add68632cd7be6393a8178223240e2c169da29. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKYGK2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1488bd7ed90426a2a1d35505b54567a7db15fc9113cd6d8596ad3496d8f4b3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/UKYGK2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f48adfcbf5fb138f4df4c22ab20587985f2ec2076a57bee6e760a2d1be53f01. 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/UKYGK2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa0b2d31bbbe73c9d217a6ffb620adef11694fcf6ffccb70a2e8f9ce9e05422. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/UKYGK2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ed8885953fa66b40e15f6e2263f2e07cf1dc78d4416a5300a4a1751085d211. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/UKYGK2100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19c2bc4078b3156b9bd8b59a11067ac1dff4479a3ee83e224cef7878b081b01. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UKYGK2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3a444964d6391ae35efa2219a9516c31d3d27e7dcc902a3fbf7bb7664a7376. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/UKYGK2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1356d55ecac419d9af095724b723877378019be26a5f15b9a64795faeac7ea. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/UKYGK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ba04985eb76f794d80589b348ddef4515971ca46c8148c7c84d9ae1022b641. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/UKYGK2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a9e4f4460978693c14ccd9819770d54c70540c85e9b943a8dbeb17565e6d04. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKYGK2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2e4219ff29fbf4074e6d625db42bf6c317365c7e9d462bd6ede8443f9a6aa4. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/UKYGK2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e941dc122ba5ffacfb62fec297fc7f5cdb79aa0839f5a70d10014584718687b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAN112400381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c40c1e9e214ec54ebd9d5cc9d3342d3437f788c3dac2a42d0567dcab856784. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAN112400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1d4e804dbf82de530a6ba9f4fcdfdbfe4ff18d4964f03444e2e873e8341b58. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CAN112401577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e91d044250018bfe648458006b5154d567bdff8369d4162b0809e47124fa81. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CAN112401578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5462bab28e94962cc9e4237ec6ad3351c709e6ea26e141ea6215660edd8a864. 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/CAN112401572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fd6b3421afc7a0cbe67ee95da097727b74943f9cd1e3e823e77b8bd312ec38. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAN112401576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42993036f34fa552efc002baba5d35768607d3e08c4b5de46e1112b7035cc224. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CAN112401571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5462bab28e94962cc9e4237ec6ad3351c709e6ea26e141ea6215660edd8a864. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CAN112401572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6272b0d16a73602032a101c73a36df61bddf981d0a645ab1c643f0543135c70f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CAN112401575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7ffc8b37ac6069ea66082f5f73c21e314a0a1ddac8338f37afef9149a4a30e. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QM6N22544475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9739ce235497c419a887b2b503e297e23d91ec0cf032f758897adcdbdbae967a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7282558193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c23e85758ae64727074ea0a414ccec82074ab12618f253bef764974e607768. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QMDA72569757.