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 0x46f9213ed3936c84958bfb845c92f1deff5c4fc5250ea4a32fcf624212046a11. 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/a1bb6e18-9286-4176-a8fd-363069478a5c.json and https://artists.proofprofile.net/proofs/artist/a1bb6e18-9286-4176-a8fd-363069478a5c.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 0xa6ad67f82effaa63068f16bd2fb50f51f5cc4e8558a5d4cc1ebacd89599ab6ae. 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/QZES61842684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4adcfaee88f3441ca1d3683f45399b8957ffd2c79d546e6bfaa137fa41f4f2d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLI292000182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d27f330911e200fb8b786d121f87cc60821ab994f149681df18745736f8360. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PLI292000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134e2134687786a856b87bba34eebd73589f3edc131d026311a15c74452d5697. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLI292000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc851f57fcf947e6e44d9deae49e102acfdf5a80556c94a12222246c44e1d32. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLI292000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c35aa20b063b6647bcbeac5ed7e5f71237069462d494f5a49202fc4b53fa5ca. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/PLI292000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd21cdf122bc5e77ac7982483f7d20b964ba163eff24ab2e796cf1483544502f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PLI292000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48864dde27c57afe05a670508405190488720cdb56ec74ee2c5a9732dd9a2416. 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/PLI292000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e01a8423ad06393faa73b9ba9c2b01efd73671435f4a1eb9a2dc84b102c3a9. 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/PLI292000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b75d6b7f93d1e82bffe4a4c4d6912508164012f898810edb74a57297affb42. 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/PLI292000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39288c5f1af041af64f500d5e2e96b5d0e7d07d7925294b01252c3b2f66dd33. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/PLI292000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13522fd74f59ce9b9084ce7aec953af3f2b37715a659181325f92cd6afce92a9. 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/PLI292000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf681e25670ef672c78107edb5eb6e98ce83350cfff052bf1f996c494c922f276. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLI292000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d9dca8b2f47e74c3ec8869e06ec1c9bf2444f192a3a7d66903943aab9bd3e1. 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/PLI292000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0298345c598c7205be44ae7d570e2fb999c73c2a44e441fe25eace25e3254d39. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:54:34Z), 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/PLI292000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77baddcffbf54f48685631a811321ad1ae920e653d89f2978c4c86e0e700344f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/PLI292000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f68743c56298e42fac8bb788d5565379f34b4a8237e68054518522d6cb3179. 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/PLI292000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb2f3c8dd1ecf35529d49c393da78c99734e773c04a768fd33f0ed3098a2037. 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/PLI292000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c70b55fa22d39a84c39dfa0abfd3dc12bd489f7b705479337b77eb2285e00f. 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/PLI292000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f58f39a2760500f17908372d1debc01964fc7c98df0e0ac4c496c09207e5ba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI291900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f58f39a2760500f17908372d1debc01964fc7c98df0e0ac4c496c09207e5ba. 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/PLI291900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89a2e7f113207a2b73aabda8da614f92edf9b9063d639a0bf3d59ec677fd52c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLUM72100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672af3b5a085b9bf7e7d368cfe1c48f45237d9b8d7760453ce616d3ce27fb94. 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/PLF242211637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89a2e7f113207a2b73aabda8da614f92edf9b9063d639a0bf3d59ec677fd52c. 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/PLUM72100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dbacc7a8c9d200e9e9048c4e662857a6dc51ccd782595201f8d6d200582692. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLF242211506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672af3b5a085b9bf7e7d368cfe1c48f45237d9b8d7760453ce616d3ce27fb94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLF242211637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dbacc7a8c9d200e9e9048c4e662857a6dc51ccd782595201f8d6d200582692. 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/PLF242211506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b44ff2ecf3a8356b7d75d8cc88d890c17db4ec022ba1cc2051863d6bbd59fbb. 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/PL42G2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de1b1d9f025070e07822844159ecaaf7ac652c5f48a81f44bf04d0db31f1c2d. 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/PL02P2101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de1b1d9f025070e07822844159ecaaf7ac652c5f48a81f44bf04d0db31f1c2d. 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/PL02P2101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759141a4f83ae47641fd319f888675d74f91e3a9d7892970f0fda74b55f77e0e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC071901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d477cafbcd4bc39eac393f2a7305173ea9a0b98599a34f03be1a7e87d37757c. 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/PLI292200595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd1a9b4323168cb0fc58035fef589b6e79252cd2402455b975ae81a6b40668d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/PLI292000130.
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