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 0x4c91152f61773a7f0f0a9d1cda68149c3ac249b40519a94a92c56658a4f1dfc2. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11b53684-b8cc-40bd-9d0e-fb2984cd05c9.json and https://artists.proofprofile.net/proofs/artist/11b53684-b8cc-40bd-9d0e-fb2984cd05c9.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 0xfd6f1b56f1a48ad7393f2a0a7860605839ededdf89bb233f86e357231ab1f3fc. 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/US83Z2344569.
Bar 25 Music Presents: Sounds of Sirin Vol.10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc33d480403d38f8c08dd2228efd4cf3e3555aba197ae0f49d24282124af86b. 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/GBLV62321043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616cdad1f85e9e88075b02666479645a4ba719bfc9e754e4773f81f6006349f6. 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/US83Z2417516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf987e76162eac90e9ea61aa5702110accf7c18480161d2591df05277c494e076. 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/US83Z2417517.
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 0x6a52ba05591e4cc0e0c312912060f18821c0ef14580a2379c7cb1573a2e90b9a. 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/US83Z2430475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89988f9a646e671bbbb70ec3b3bb5e50a7360b07fbeb6ff34bfb80f2c9413d63. 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/US83Z2430472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592cfa6b683b83cad53d7e885f5ae7b0c6608607f4f24d5256a17ad03e0e6048. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/US83Z2430473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3797c365cc07caf5a2f5127e0b0b18f1eddd266b602b6600e73ec95101c27dde. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US83Z2430470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d87e415960e1d01a00deae46ba21dff427be12e0ec1d94977db7348897e2650. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US83Z2422193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc0188727606815c58c679e986e2335cccd4e46d271010c37655cf17a21f1ce. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US83Z2422195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47c177df90ee7a6961137e347cff76e262367dec8f04508e44022a29e74bd1. 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/US83Z2416579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1a764970c1a23426ec5a8253b597f5e20482770be7bd5d8fb2296c46e5d078. 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/US83Z2416583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cd76b3b98eb1d9d2d000cee47f7c6d3be12aa475a4326b3c595411c570c125. 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/US83Z2497084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48dda281153f777e2efa8905f10ea8c20b905e6faa23cc4721055d4592d720d. 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/GBKQU2455402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cbf3e9c9130715268b1aadd92146c1cf1180f6775023ea277b6c23c19768c7. 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/GBKQU2455403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d32d19f71b0bde7734882e8b495fb4cbd7becf68c0e3c22a2e09eb1fc5d126. 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/US83Z2485149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6c6a655275819eda24a252530febeb57bb138d47c070da1a483f7035fbd2d5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US83Z2485148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4cff03ff415cee71b40339968bb7e40e4fe09aa51ba2b3ee80ce5441996528. 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/QM4TW2404985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8da2142e42d98969916d59c7b3a43bc4e35a11b6a51307c3179b3763efee39b. 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/GBLV62316039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a1921b6ccfc802d18666826da61ffec34544cb83fa7be94c7333691345efe. 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/GBLV62316040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dd3211045b21cd8ad2f87ea7d802e541499ba4f8a299c6b563be8fce5a287f. 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/US83Z2348888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd148afdf122774dc02bbd04deb0bd189f74a800974f71a9ba86279ffa138b759. 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/US83Z2348889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c0722df02da3adfcbfe40bb5fe0d3feb501de756a7481645d813cc6a7ee2c3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US83Z2336487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17627615d15d40ee21597153d05f0c6e70affeec721e9c7d5fdd36f1153f3d50. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US83Z2336486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed00fae0d8275e0a42b138cbd2640e3fff5baf3e257ad3df183461189c56da1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBKQU2343290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbadd63e1255f01a83b8eef4e7f4a86d4fe11cea953131126e67cf235411e0e. 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/GBKQU2343291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772babc631a3f6b86a8156afb7ae4e5b1e324030c07975e8bfd8fd94a99461ae. 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/GBKQU2342185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c1da3a2ddf156a50290953754b9ca4832fb59b882b4e7ec13d69005b2ef755. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2342186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21647e40d46828b89cbb67aec0cef31dd8e37ec8d975005b3515db91c59dfe94. 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/GBKQU2501488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2f75a10cb654ff05a2d2b9f89a40ee5d30fcbee46bacfd8bc57fbf725a3b20. 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/GBKQU2501490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0796ef26fe834477786ee8f8fd5dac174563268eb0f72c621bf5da9ce7757f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2501491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f7c7247f916aa51684a26b2343cf14f1e4b81b04ad37cb2173d1897a94e3a5. 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/GBKQU2429163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe311035f14a017f05ef64a97352f0c56e6ba2430eaff2872526064404d24f99e. 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/US83Z2404433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdeb30eb75f7eff61e452cfe1a891f5fcde885f17af2e16db0863659dca6bdd. 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/US83Z2404431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1813037a1b9feafd9a47361d82f96c86826db515763ac56b4162c7ac970301f2. 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/BEIR42300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8d2169e0b0bebe939a43211618e202ef3d4f98312f4b07666d5d851bcb8f99. 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/BEIR42300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bec12ccfd76e47bddd193974c8d39802d350a06be3c5d3af9aaa7e5de7066d. 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/US83Z2420712.