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 0x31b090dfe876bf2aa2a5c3dcd066a3ce2a52286156c77177adec477f2d2a5585. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb16a478-972d-4f52-92fe-f788b509fc71.json and https://artists.proofprofile.net/proofs/artist/cb16a478-972d-4f52-92fe-f788b509fc71.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 0x70b8b53176c5aba446c11a6809309c153b2576a5b62588a51871646d5fc90589. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812234122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83aaf9bb35842dce563ad3ac41aaa6c345c21f8eb1776323504adf55d370ddf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72203583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6285efccfa1af16a7e46bb63bab828840f324c333f72cf22076c37572cdfcd66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72203604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec3d08897af066b8f7a944918aaf3659077060abe665d336bcbdc88dc40d16f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72203605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb89440cc71797063b8ffe2df3f5ddb4a81da28cb156ec4a89f8e90fb37a56d7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72203606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a9186470e94a324d1657ce9c04745b8ccdc77efa734baa061c0f2a686d52ea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72203607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066a4516e3f0d363855b8b2a577ed7efa6ef01ac592359324daa2df9dd9a0a00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72203608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf835fe48251cda07317305720b730447ddcb332adcf510e7707de53fe2ecf2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72203202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f84ee8dbf737243d154b1230dbe366d93fe9d673950129cbd828106b72a486c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72203609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd421cf290680ceb55f10bda3fdb134b51318bb5fa87cf9d33377683ccbc51102. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72203610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d424f5eab0f0b544732da9fe3077c6ffd4bb923b9d80101170b7001d46887da. 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/DECE72203611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161a1155c2530e123a1df4f9ccd6ceb895e1937639aa05570d2d90e40765f924. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DECE72203612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2f3220d58ad85065338a0285cd8c0b03497e835371b499b6ec03e103e46baf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72203613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe25423468f281cab357151ecc1f589ca28a057f88ef0deda5ab6b715954158a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72203614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf95c5428a24a73c63667947a52931dfb2f449e3c06a061ca9029cfb2a77074b. 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/CH7812400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1225a80ddd6ef0b2d01b5835e41c0a1d5a49e70376236fc1fb8a4ced5e2dc97b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH7812346209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a51b47c43ce52d8b6cfd9e3ddaa300bcf389f7d76e56ef54100c0381495f922. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812234375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5835f2a1403e0941de035fa0f01b48585b296907109203d93a61ce48073fac70. 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/CH7812221743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bcab68baec6116f0b1405f266676654d4437fd47f7b358516e5d8ed0a6dbb3. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CH7812219561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a859a0f25bb0fbe7730f784584e70ec6b0964ea260122f8c0e64da0cfe0cc9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812109260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e655da6e9f1d15cfa36a037b4b66d0138b37f0ed97fa1164ab75f7b9e495946. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH7812105502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427495133aa0a65504a92bfe5cc3f772ac6bcdbb8874ea441e06a2891617045f. 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/CH7812194856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd767ea13a57ad23c5c44e375aae336d8f7f9a8131ac7bad6d3e6730a28e2b0. 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/CH7812177952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90805fa7ef6dc2839a7882948670f4b36ce142c3d7a2a8653d2c2df1b2812f43. 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/CH7812177953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7aaf361cf96fd39ce4c57c62c6750fa4af3a9ea444d6f9adf0014eddcf68f2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH7812177956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f396ead213390a2d12e283643b90346f2688d09678624804b72ccf0b22c1d2. 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/CH7812177957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46320ca7b6aefa19c9bb0b8bed00f7ca8e6a79056c4f56e1e35afb57cfabefa8. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CH7812177954.
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 0x46a6ffbaa25993c53efc57993d2ea034e960b945b2308159f3e5ed8bc0d807a6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CH7812177955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3314c9b9baa93cdb9f12df084af3c52723dbee4a3e7abfb41dc1fe244a89573. 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/CH7812070534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb50021b115d201ac70a9498e11e84d6f085f9aaa46efab53b7494a973aac4a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812073420.