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 0x9b2773a702f70e150bcb4d863325641378ddc980a28e17dfbb1e1ded3c4b81dc. 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/bb4187a9-fcf8-4518-b15b-f8ac40f4bf48.json and https://artists.proofprofile.net/proofs/artist/bb4187a9-fcf8-4518-b15b-f8ac40f4bf48.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 0x031911a5786ebdc3b78be1c3d67328eaa9ce858fcf9677987bfdc029b835254a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM20649329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad60730abfa0a523ccf2baa94823026221bf07f18a299924a92c5308bfc8f70a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:36:26Z), 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/USEXD1410406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa010057ec58efad8c13bee8cfacad67ae648e58a7e300123a10398b22b06f2fe. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:31:13Z), 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/USEXD1410408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b28f818223ddc63a33a1951e302d09756ba80303b69edd7439ce3bf056a3f16. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:04:25Z), 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/US4M31608293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9672a6587d1fd272e29cbbeb590754e03a118ba14a0419c8d6b6168cd9f809. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:53Z), 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/US4M31608298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc962eafa135ca8ee69a5e184b0d48d0a3e3a37c51afd3b24fe12032a961351. 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/US4M31608299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845822bac11a91710b72c2bf41473bde7fd77e3cb754fdf04b2d8fc22ba2cae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:10Z), 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/US4M31608300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6e11ab50147883608dcc3683af4203ce0e1454fd97e701e2fba83aac6f285e. 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/US4M31608301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dab5c1aef19edbc835d715eb7788ebd573daf2827c186b43b9026ae9213058. 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/USEXD1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd54702486e3f77377261f68962f02999349d259a4f9f1cdb6c90e53a682d29f. 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/USEXD1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316ddae2c2687c4d76304e04220c62accc66e8b761386caf9afc458c997b276c. 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/USEXD1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31266d7aa6e4a1888f4068ba38f50eb2859a53886ce381ef51f8fc1d99b14d55. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:59Z), 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/USEXD1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275ffc0e7c315a2cfcaee4591d2c012b4ea51d6e05565deeb79e8f055c08a5ff. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USEXD1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840a045573694d413886c63c1b20393b7c27dfa13081fec0f225f77ad2101962. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USEXD1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee34f70fdb3740c7a47bdba03850ed96f6e7bd99f2057614e531abf3015842. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USEXD1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36239c4e001b1118f24ca265b1bd0a45981e8c71c05d20b48eb527fffe4e06c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USEXD2000101.