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 0x7ec36b2dee6b2cd441503323c241e7cb7464107a9e5657ed46cbd2c89ed58527. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38acedf8-73d4-4fab-a66d-dcccfa52421e.json and https://artists.proofprofile.net/proofs/artist/38acedf8-73d4-4fab-a66d-dcccfa52421e.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 0x3c1eb48ad6d9202267abf4b894de093a92fc66c82eceb41bd339abbc22d3f2f6. 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/USCGJ1253433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc192706c638946d57833bda704bf6d09a5c9d879f339e009ce922858aa5c38da. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USCGJ1253431.
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 0x49e68509fec23401e683e154cfdb2e315d86d45e3d11423728b15cb2e5092883. 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/USHM80737717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7a5865928eaed10d07492b0862ff5b0761ad4a4621830013c41fe4895bc89. 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/USHM80737718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43888d214e815ee7f593020ae5d9c1bb9c15b175fb7a6088490219d43f9bc7a3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM80737719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c21bafe4ac770e5e0b179db7edf912373ff3db6e97e42fdafc6920f1956a252. 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/USHM80737722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4b5da112d9b389adeb46d13770cd1c158811b6016123ae106b53a3ddd68b06. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM80737726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659007ced024cb02967581d833b138e68ac05da1e97729c69ffe888389e7b551. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USHM80737721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59e25045dfbbef046b2e84c1dd43f6e76675891ac6134b1ff8b4f9381cfc9fe. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM80737723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe732b3498ac330b4a48bb6c437382d26af52a76d94b93c4135a1ac83da36a0. 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/USVRN9900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4273ee8409856989dfff57d79c35561eb39d15d8495cc36c9b7c1709ff42d41. 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/USVRN9900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa05c8b2cc172acba17ddae2406102ca48c52b0d80e5b895e2db53273fae7b4. 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/USVRN9900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258b439fac88e5c15d3588b6db165beb1a18e93ae130c40013fd85179edda66c. 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/USVRN9900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c1de355e2f61833f398fc64ccffd130d2838cf0ebae6578979fc50b6802e4e. 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/USVRN9900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b12b69c38f107662e757b3ee3092e0f72018957258ee10528dea51afb376abe. 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/USVRN9900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889a8629bebfab394568301cbcf900508cd6376e6baa12160b3eeebfe87cd385. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USVRN9900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9a81699362c09c3a4e26f23a0eb668c693d861459bc994c212ea0ebd94446. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USVRN9900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc834dd59b35261acd590903da212e49453ad3c35bae8428eb217115e35bfdafc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USVRN9900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bbee3c224e4fb6017087eb32aea6177ccd3ed8603da34be3bd4636edf47962. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USVRN9900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58879088ab8a33a838f0c215563149fa54e873475005d4a34c7c7121328a4c07. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USVRN9900027.