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 0xa16009fccaba1b9c57c8869fb2537cd283122176a7d07250a2c5ac89f77f6d4c. 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/93787196-89de-4a79-b42e-8cc38132c357.json and https://artists.proofprofile.net/proofs/artist/93787196-89de-4a79-b42e-8cc38132c357.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 0xe0b225be063e2f83db7e894b1a3f182cdd867c3e2eaaa0ff069d14b72152a5e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXUM72200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a932d5bf580cd8756b3d082be6562050b7d87e77ddee4268d860b4b047a408. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/MXUM72200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c3bcfa2cc197aafe0d6a78671a690a27843abb09c0da9523a2341c5918e18e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:54:56Z), 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/MXUM72200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a641547dd1adabc133e0f3c9db860d52c0a49ba009237ce05394592f3c1dff1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:58:59Z), 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/MXUM72200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e65699abfc4475dc48c3a1f26444a6bc8890d4118ca015e7684796c5f676c92. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:50:23Z), 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/MXUM72200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f60f7440d240b33aa5a6ea0d30de57eac7d4ed51f11a88404f33a2adb29ee. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/MXUM72200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b7795e42c69a7280eff5ebc9a8eaee252e228583b1b15f7648ab656bd4a4a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBRKQ2044658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590806a58f08e36203f1e75e4ed62e07799d462afe27f76006b705b74e341f82. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QMDA71400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cc983fb27ccdb0e50a1fb87300ae6366f844c5e657b5c07f2d8a1bbb2d1eee. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USPWN0810169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd689bd419d44bbd15dc67b88ad00a2fa271638d721107db2ff62b0ae408fb. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/USPWN0810173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbda25732af2316bb7cae93d81e35b5788eb199aaaabfe1d5ed1cb342d73615. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMFMG1437738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801466fec62aed2248bbbcdb34f894fd0a2ff377345ab8e14aa430d92c17b95f. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QMFMG1437739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6b70448865a8357d3526781227550bd490f8ab30c31f48e6e6a4dbbc49ba66. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QMFMG1437742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20de85d95ad9be681f821a90b7a96ea5d973b02c30250b1d33f6e729b4385f67. 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/QMFMG1437745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9926b2e780c75cafbbe13a045723e7ff5560c296e9978ab556575175257843d4. 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/QZNFJ2405242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ea073568b37763e4f7d04f63a183de786d6e6d14d0b02f16bcbeddb2d260ef. 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/QZNFJ2405243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0641e534342a3bc66fb95df755c06011eb6a49f0d53e47cccada9a76d6369566. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNFJ2405246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746b8d83e567cb8d6d3e68c2c4d26ed5d485141c8199a8eb8ac5be03703c27dd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNFJ2405247.