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 0x12d0e79665ca1a0298d9c5ba1beec50efc62eba0ba3295dedbf334061fcd7c45. 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/ca993bc0-8bed-4919-a18a-d02688a6c03d.json and https://artists.proofprofile.net/proofs/artist/ca993bc0-8bed-4919-a18a-d02688a6c03d.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 0xfc68c7f103d7677dae2fe0ebbc3032e3f817396a3739756d8b827cc53aef62ca. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZA2619000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5970308c3dc7b64719de2c46232aa945cdf6914e51efae01f7e99eb94aa97897. 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/ZAMIV2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce294b1504225bcbd30ddd39b2514f88439ed70f0db90a90f02ea1f9c5b05aa0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZAUM72300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764de9f080f2c0b30376fb39b9dd6c93e56da493ecf27d4df1a62435f9cb9623. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZAUM72300855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1f1924ebd948797b69fcfe9d1bc607e9d4422459bbaa1923e0d1f4687d4dd8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:44Z), 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/ZAC012401502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74de65ad37fb895b9455097d7348007a087e17ddab75959beea9fcbb3eecdaed. 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/ZA95J2200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3bbb59b244c9feeba3fbbd2f2a320dda28c441417f0cd663937dd0e5a3b3cb. 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/ZAUM72300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197497534a968421e1f3a6ee0471c81549b463bb4a5347ddf6d2db3b7ecc0029. 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/ZA2619000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbe184a2ac6d99a7c4098586f08ad8f6255686b2934a952342858dfdec7af6d. 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/ZAYIR2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2f862f8e98caa3a80ba319f58bed7847090cf3b9961839feba09840a330978. 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/ZAUM72101601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c029c15fb8f213962e23cb5562bf863ea9ceff30e96ad5aea03dbc80c5dcd7. 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/ZA8CJ2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb232689249ea7e4a22c543dacdef2c8b922c9dbca1bac51f8e292e314c937eba. 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/ZAANN2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd90ac617b590f5cd4500213202ce149f046c227a1c1a23411d2414a1a38364. 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/ZAUM72101607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fa99ea7b655c91acfbc8e5aece63007bf8cef32b0590b45c784fc18264c1b9. 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/ZAMIV2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2f862f8e98caa3a80ba319f58bed7847090cf3b9961839feba09840a330978. 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/ZAUM72101601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5970308c3dc7b64719de2c46232aa945cdf6914e51efae01f7e99eb94aa97897. 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/ZAMIV2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b40de3ba83ca1db054f8706ad4c8570c5dd31ef46dda6523ed73e820c925f5. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:53Z), 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/ZBLZK2300010.
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 0x290aa6e4fd0140baab716ca4074ab600834ab861cd138e50924ee9708f0f4c12. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ZA2619000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3d0521216773782c92419f3d37bf0d38e6bcece12d157a1556791fe927616. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ZA53P2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf0b7f1500ccf14024cd38b58d5ad5949b75d120cf6e46454d2c4a47499f1c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USL4R2332935.