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 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 0xe31fd3a92f82b907f2f64e599c8deec02edf8da5b9415617c663d03466d2a809. 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/47f47aaa-e77c-40dc-9f6c-840a71f19d5b.json and https://artists.proofprofile.net/proofs/artist/47f47aaa-e77c-40dc-9f6c-840a71f19d5b.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 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 0xd851d642540f0bea330ed312d20650c13551e78bb318575b759bee4a57f279a3. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/NOAPI1596059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed11a5523d13c2c9d998efeff36d41a9a6fb62878f4f74224b20bbcbc9322fd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NOAPI1596062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7e340c9aa3691657628360066fc8c1a33df5846854b95ca59760f2257ac436. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NOAPI1596063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f793e4727c7d7801412392a6c6bbc79be0f04e24f8f904b0513db5baa3c0f3b. 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/NOAPI1596064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfd1b297821d547707bf49ee5ea662a3cbaca81e26e1f4c18cedbd18222b42c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NOAPI1596065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350fc46818ee787c67f51ec0d72c58fff5c5d023d3896cde4d32a54c205891de. 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/NOAPI1596066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c29ba35d2e3b1cd62c8b250c7168c3ebdd28544d91c00ad934b224fcfed41. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/NOAPI1596067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382239cd4fd54bf4260127a88c8ff0c6eac89cd0fcf6385dd3e4c2c8c00a1ef5. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NOAPI1596069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecbb8aa1c13259b20bfdf8a6d450d68713cfcd381d7a3a719bc2c051e9df04b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NOAPI1596070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e2ffadcc2d602a68f95970c63c39349da8ce1cf87f0ee4f6e7e4a447792f90. 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/NOAPI1596072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b4ba56b468cf99a5b8a68e0fe88e5fa65f3099c22f98f0b92a198ef683ae74. 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/NOAPI1793605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b53d98b82b19cb47d1d0a23bcffb5b3f415483a2d16298d74f7e726b79f01b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NOAPI1793606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4551443128bea72420e033f801f4da0d199a11db0ac99c8da19e9c39ba25f1c4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NOAPI1793608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5374537615d4cc38bed08eec8f3a49a5110a46191da2c5e3e86ed9fd5e699584. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NOAPI1793610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c21febb327e77948f4da8765c1923ff46c071f4e1468e391edb02f873e909c. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/NOAPI1793611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec70224c0ae25f87bf0fe1738be0d164d398877a0ad350c81b9cbfdf78f7c83. 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/NOAPI1793612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca303f8e12efebf219b874b914839b4c36140edc8d036aa464e1c513f43c5280. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NOAPI1793615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ae6d35260e1225b3e6794483caa7bab2798a8c8ba89e8a277c6674bf65f74d. 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/NOAPI1793616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8e72d8162db284e6d26201eda57f4758f250ba209c49d85ff8a3640a217513. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NOAPI1793884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd747ebf2e8dc9503d65f85fe14486fcd68cee2c2ae3f1b50269f88fea048574. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/NOAPI1890535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b32710c3b50d8e9a4bab571bb5c573389643439b08bc5b3477aab65d613b319. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/NOAPI1890536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f4f1c2e9b25d1824de7febcd787df1fe04c9b7b94e67d6dc8f0d89ebacca2f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/NOAPI1890537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb68b85310a7264b910e64a12de52225aec2a5c3094c7e02f4a558325ec6c55. 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/NOAPI1890538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6e5d47270b107947ba3b229c63f7c4ab8776ae71b3b049aecb7a4844efcf7a. 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/NOAPI1890539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eca50e34d44f13152c73e69aad2659187c9ee5d01721def348cfa7634e649fe. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/NOAPI1890541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a0653bc573fa88344ae52f6ec7b8e5aa7644292d526eb92c620c3624dfb541. 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/NOAPI1890544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b44f9ef89e0cc97ec0561a54a6ea57a897f4417f0e80fe4123ab4f499bdd8. 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/NOAPI1890545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df26c1294cb718544ac3de4c3da4f4e3f3ad09ef65f5736493e4f18b66ee754. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NOAPI1890546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4679da8c32e86f9e0cbb7d59ed6933d1e7cf47d7db0c2df1e44a8c8d9cda798b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NOAPI1890547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ef0939db6053427e13325a76faba0dbb84c9c8361a4ea47786926b031a4426. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/NOAPI1890548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1244a10f60ce166c889dc1907516038cfd4392c47844a3d5023ef1be14f09fe3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NOAPI1890549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd98291a2e6a01873346b197a91271ca15ee788ca8c29dd5a48c38dc4d2df0d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NOAPI1890550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e938b859eb478b33caad46d4ed32f8f0f39a2bd9ef3a4f901a13501eccc84. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QMBZ92529468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe6542d7d8f970fd00187c7503b09efcf39adaf7df70ff9971cda41c7110199. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QM4TX2599922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c5d6c9d2b53672ff86600fead55ef70e3d437371220720b05df619b794e1cb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME2411740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a70a3744327e663b1b0fee7a566f6a2d48c0bce18e4a6a720535ac79ad947ca. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/RSA222091092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a565144285477593ede2ae4e19dafb322fe07875b9e133ece92fb4a9f7d684e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BAA052122406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc0631464752a757860c29194dece6c8f5228a9a875e6097a0b0d43ea30b796. 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/BAA052122411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299432e14385df20fa585a7866c25249dde12314b4716c6cffbf51acc6786abe. 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/NOAPI1890686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6978d863b84527786cb746241f6b6af773bc7ee6b4fc803f1242432c52671934. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOAPI1890691.