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 0x4a5ccce614d2b155e4b28c299dabb79d4558c5aa0fa15dbae5f1fe87d5249bb0. 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/f5e15173-2d31-4bfa-8a4b-717a5170355a.json and https://artists.proofprofile.net/proofs/artist/f5e15173-2d31-4bfa-8a4b-717a5170355a.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 0xf02855ff4218bf540489e7748ccc83f9c9999be782bcf12181d4955043fe2788. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR2X42021224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61478de2287ca9670945e46c8f5f0fd7abbd08e44a415c02a6c817f52726269c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR2X42021216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002c94a9105b1ce0116c74811b1dae0e82827c0362dcfea5ee2fd709271b012f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR2X42024428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3163f9b8ba67f0861ec227515d0bd6bd13399c28392e2645ce4fbf0a85cf2. 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/FR2X42020190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a198834cd4771d7fe77977536b999a4f2c8d4f54545f2992ed82cee4318eefc. 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/FR96X2005111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d809891daf886122a67d807a10c608dddc2c2f1acfcacaf6fb31bcfdfae356. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:45Z), 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/FR96X2093656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e823437c873be19c6b080242e3735d337af8960ae3c8c0f54e93df4ce39952. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX202073442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd256965ade0c751de3957f7aee42d15b384b61080f2101d60f1f0dd63edc98c9. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRX872013953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f323dd9feeb909c973fe3422609012a2c30ba7db53e789d01e153f009387134. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA052043128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65509979b9b2faf69532b04ff8dda53930a360e3003f73d870f4ede372967bf6. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:42Z), 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/DGA072155850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf9be87112c3b5f5ea59f40e5405752bf982b4b5e922709f910a1ea62b7c167. 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/FR59R2112913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9998057b3efdd89498697b8eba6ca20bc0c80c7c03769f7ac38e019263ed62fa. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FRX452151086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c5fb7451178185972c3006c645b66f0c63f7e169182356294313c932f8629b. 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/FRX872154014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c66ea5f290b4a86b1555389d85247c9a794a9e086e7ab6cd8b1d683d62e411. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRS182135204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6610eecaa6089890a7c52a336f1245f4effad1fb4cda1aae5d98f7aca53c90bb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX202212472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7935795e75b2b94ba713ccc86370ec16091086c5c58d6a97875dab5a63621d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX282291756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bc778c5b41256d9dd87a2776f05ffe1b6c9f8fefacbb8942c35eebd9af5bc1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DGA062239171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d978b8b0da33fe4ba46b2800df51ee0dea13f8dc79879b19c5ba72ecce6e92. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:57Z), 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/FR59R2313765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f007796b98e9c440b00ec1b152952e6a6e9a935769786d17229c465bcd00a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR96X2391946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b07586f53a6315b5476491d5d63aafe0a9a8d4be8eba8bf01db2ab1a2570151. 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/FRX452332784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef03985568eb892c631b2300f50f2c4a4b06559e4f61f5b770f0be96d452dccc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA0L2394164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5831afb177f22f2351111f8f9809e9b441d3a6cb5d6d526ec0e21478d41ee001. 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/DGA0L2394165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13502a3a6f69479a1628b2371065e9d17940b3272976a5d07bc18f4afd02663. 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/DGA0L2394166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd8a5583c66e46d5d2eccdc153f923b33f4906b58f3a3f6b5b7fc84f46445e7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:44:57Z), 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/DGA0L2394167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9852d3f03d57bd9c8056912fe836502c583208aef9b86a6bf9e6a77491491c63. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DGA0L2394168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a28996338139d74bcf6291a3fdcc17e44e6e4e8560b408a5182cf3bd4655982. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:36Z), 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/DGA0L2394169.