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 0x6aa3658cdf0ffc41e11488e91bd5f64798a248bf9bb4bbd63d4d5052ab2ff823. 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/9cf9e609-1136-43ea-b0c1-eba85e9eee48.json and https://artists.proofprofile.net/proofs/artist/9cf9e609-1136-43ea-b0c1-eba85e9eee48.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 0x9c348cfdea21dd47dea354da4c1585fb73e854ec6df08616d2e92a8f005b2995. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/UYB140703402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1cecce4064bb25e31c2700dc01b2926b05ca87ed9cdddb71b79255057b795d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UYB140703408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a314186599fc5ad7854bea523994ac360608d0d37814072fd18fef88ded67fa. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/UYB140703414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428d5bdb988d533be7f17216233a2c25fc703e926cbee0b590bdbdff7945d839. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UYB140703419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101cd3a671b9bbc02fb8e618b5f486e0f48695d719b73d746383506ba434bad8. 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/UYC128700216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e288f4853f6cc2ddaabdd8f28bc218d632d00b47f4e28464b261ca2113f7be3. 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/UYA139500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e361a71b57ffbbcd2c01dacac1f9735681f1d173690bb42fe999bf429e4febe. 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/UYA139500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae2e6dd56c55d98eac4ed11bf294172746d22e16ae28b2e523ad5b33c8760d2. 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/UYA139500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969e44f02647b64b0bc6b5e142a4e0c385e2904009ff6113588ecf28ff58c7c0. 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/UYA139500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3e6ecc443c7e575c97d7393f980d43e28526e39374fb931a50c157e557c7b2. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/UYA139500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd768546512d3434d87730e4cd7c0ff56768cedc079739c7d0f764c739cf7f2. 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/UYA139500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb3804af2349ee32905bc6c3521d345b4459686fccf025cfb01a7d7eab3a82e. 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/UYA139500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189f661e55ce4024bf8b31d1bbc44a6c198c9afbb2df0a894a30534f813df97. 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/UYA139500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb00765095e299fa6221afdb32f7256b22941948318d36c371e5c2c261d8ea9. 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/UYA139500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdf5756fb16d9ab8af7d6d372c5b4b85ae567f1133e86cab8adf9799d4ad5a4. 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/UYA139500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c31a61ab3bea63edeaa896ece4af6cea7997b252167310cefc1d3e90d0c4744. 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/UYA139500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f8c952a1ff5c69ebf7cdd4ccb919eaba79d0fe00a031edf1127a600a62f9ae. 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/UYA139500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389eedabc3adde606bf455f764b05abe87baaa86ff5f7834fd548e9673623f6f. 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/UYA139500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa92785314600b77e3eaf48bb82b00334c77c30100b9206dfa2a1c445d665d8. 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/UYA139500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51824f4cce54ceef2cc80cd5c7fbb6f68b5d511724ecef06b1e9a1049ae13b8. 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/UYA139500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42914a2c3e54ebe974634df77f3d977b6a71521a81d21a74f959dd24ebd329f7. 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/UYA139500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebb5655c4db8ce5b5c5e05223707f83f5468df823ea97f0e32130aa19664a9c. 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/UYA139500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39c22550710f17c8fe888b56cfaac116a05bfdb3ac92401a67947cdb290bf24. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/UYA139500114.
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 0xbf6177a4f38504ef90ff9a8d6ae513822a63b2227c95047861e9f628a848d165. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UYA139500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c1a52e20999c875408d397638504bc8e4ee51673ced2ae8fc1a354416dbd97. 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/UYA130200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dcece40b7d478677f54e56e17b7fa54f1a80f370ba654f4dbe715e793c8e60. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UYA130200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac035aa9bc2ced1b88d36c54dd872afac4460f80aa64196d108d281ab7559ee5. 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/UYA130200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4474169a2001d729a39c69767baa750d431ddf251e3bd1d93db95fc1fff166a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/UYA130200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e202df656c72a902a5cde9b5b86597ec835952fbcc33b7cf477ac028ab4ed5. 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/UYB140702005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6d747c19b38196c243e09316aa97bb32da3a29ed7fc4fb7f26b51504f67489. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:20Z), 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/UYB140702012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2457f8a222b5b6ad57af3d799e71015431b7e823cffe152bff7c2304bf3d290e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UYB140702013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f73bc661daffb5e9248e684c11187447c71055328722573e12ce61a36f63ea. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:53:29Z), 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/UYB140800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434965d3bd8d321881d7c5bb2dd002a31dceee2c9b41de5cd7d5db9f58cd874d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:25:21Z), 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/UYB140800212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de50870d62d8e6a24d059d01549f3c19e8d32c741696ddfee2b8274e742e930. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/UYB141401809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043d23cd744027702c2dcab3ad8b3c66ab64ec97b0f8e7257473c08671fcb936. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UYB141719602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d5c39975f7ec914e6a9cf98dcfbaf58181da9a6586e406cd0f5879acf99c64. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UYB141719604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a04c746decd4f64399b93301d7db544597e410072aeeeb00613b359b3b1429. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/UYB142318201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a04c746decd4f64399b93301d7db544597e410072aeeeb00613b359b3b1429. 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/UYB142318201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4a21dbebff2cfd0360f4ff5b4c23c56a0a09b87de2499d63d831e6eb272b47. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:20:30Z), 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/UYB142318202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdaed7577d986d8ab6af8eb5ef1df403537dd506bbd3c196427bddd5359a98b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/UYB142318203.