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 0x30b809524e425bb4127e524ebb9738d17505ded7c6c9ce3d73f942c21bb22203. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dabec278-90cc-4d89-ba17-ab9d5abdf7b9.json and https://artists.proofprofile.net/proofs/artist/dabec278-90cc-4d89-ba17-ab9d5abdf7b9.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 0xf798369353b1e8dd1d42b68f5d0fb18ff9d21bc5f75711ca53b8217ebc7a4771. 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/USUYG1149390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f84663cf7ea7a002597811dacf6d0b39547c7e0c41ffe38995944779b87803e. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/USUYG1149391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd621da9dd5e3c2f0587255e7d49e83765c4e0bbdca486a91593c5807325c5ba. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:47:41Z), 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/USUYG1149393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e650f532a88fa59e714fb1546bb24ef38546de3f291a97a8c2c79d907f4517a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:20Z), 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/USUYG1149394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2949db0b9ae5f3c4dff7ed718ae2dad641e7b7ef576f697ae6d7309557adac4a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USUYG1149395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923582767c956ed974b06a3cab33c48119fd1c58c18181b2d92e05b79e66551a. 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/QZAPG1748675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe999d8a7c4e9688a6620ecf93174ca31c5bc00014cffec37a892431e3131f230. 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/QZAPG1748677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d4d36688deb5f35d0ce3f7617dac6350feb3b3a3418362955da0d080cd17dc. 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/QZAPG1748678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5981c42487ce77ff0654a67777fccb50dff6f088b29fbb3b8ed368e5cf4d7f. 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/QZES81853712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08d7b79d0aeeaff655d2693a44801c3928d0f4092be35d6ddaf85fdc0fdabb7. 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/QZES81853715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe074efab0bd00f782786fc4074536861bbcf7df138f1370ab8ce00f3affacd5e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNC1955432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaa66c2c91f98749b0683891ba816758b49bc4f9b77cad337099d7ee8e6bd2e. 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/QZHN42120360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9beba0c4e0c91d141e10044ab15815947f4ea815bcf5d0bbcfc982bcc0d3aff. 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/QZPEW2234185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f26f981cddd57a86707c74f3dc3623060d26997ba822cc977351af5cdd8f4c. 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/QZPEW2234187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e333740caf021ed2a2ee3fc70cb2a2fefe0d8f16df56daa127d2f3ed9ec09b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:26Z), 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/QZPLR2211556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31043bccaec13c526d00d88753bb1f0aa5ca9f1e11ae736e83728c0912775ac3. 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/QZDA42311358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31043bccaec13c526d00d88753bb1f0aa5ca9f1e11ae736e83728c0912775ac3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:02Z), 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/QZDA42311358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f56c5b7ec2aa72647f662d6c672f4de7ddabf1931b2e3a1ea5c36576f0da754. 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/QZFZ62010569.