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 0x078170b5dddd8c9e6ed5758067240805d13933c1357a9a6b6226be69267ad33f. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2d80d4f-2d35-4d2a-bd75-a009d317346a.json and https://artists.proofprofile.net/proofs/artist/b2d80d4f-2d35-4d2a-bd75-a009d317346a.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 0x2e2b64696c446be4cda65f00cfcc7934fac72adc4c4a777bfe07c8408b419ee6. 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/QZFYY2009218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b6f21b9572abe66fb3c61f28160eb6068e9e414834f6aba4c4413c671290ea. 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/QZFYY2009221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e75a0e21ecfcdb892683aa874c2539d10b175585088633dc23e9cdd35eeff. 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/QZFYY2009232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51191333219ef21de4aaad8d973489d8378848543439d45cd8971269b3989f18. 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/USHM22119537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f30564e8a88e45296441b93a60026d1c4523261e35426e3ef1fada0057d82. 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/USHM22119538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5878f65eb5d0a5a12c84daa30b5608d3ef6bd72fed926d40a42402b7cf089c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGJ2186971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee78306d6e2fc65fd828bf90cb6e74f79b7465ed8a0109d0b2b504c2349909d7. 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/USDY42172000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4233e0aeb6be142e3c816dd378e5889540ba63997ac19cef23470d5e0c5ff40. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM22119536.
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 0x5d0582b964afc58c362550130f411e60a1177762d81c184750f9fc3e2898cb8c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USHM22119539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290796229654cca954e82b43fc761736e23c7d1878fde377734649d98a016221. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM22119540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02879e04819d18e8704173afb18c72d3cd8d567ade9a9a7597e7796fed1521d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM22119541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61680c46b67db36724be8f3edee7ed54b31a5c36c5a455aa63550321c72815b7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM22119542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849c4ab712f830fda111513f0863c9365400928ff7a9cc612a40c57dd6a5fdb3. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/USHM22119543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa6eccfbf0f3d94f23485a87716f8ccb0d628874aa0a3f07eebe8ee75e9125b. 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/QZNWS2001594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f3bc2db79eb4ead956a564521600a7024749a1ba6ccae4589daf813cb15ce0. 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/QZNWS2001599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91917f1c248568cd8ec11414b7f43153b31df13db9926eb953be3ab53dc43128. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNWS2001603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24a198c4d8662cc2eea3edd7ba771ac076e90ec1f7a31f29f58cac70fc52531. 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/USHM22324544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde387aa9316e2b639c1317135bc8ba70531b6ebff262c2c5e2eabc9bdbbbfcac. 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/USHM22324545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f83ae641351a527e4a2f2e754a2f31c7193e92fea1552456c062d335571cf43. 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/USHM22324546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cda7c32e4eae0e04597ae71424b64d96ecfe5b05b83d0d465cca41fe6596a67. 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/USHM22324548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0769fe36e9cb7acdac39c8a47f1b0ebbd48f4e3b4d859971e06cd90ed17f84e. 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/USHM22324549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb244f8279f1987cf43cce374af9827042f1d7ca642022384a1cf0de5857d936d. 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/USMH92389958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e25e58b512e4f12ed869aed4e90638d8c7767b5ec88d6bf9c832db64ff6e33. 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/USL4R2002707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a581cddcf7dac94ff97070a812328b3ee01275af39576efdc6d6d1c9da71a9. 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/GBKPL1941412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8953b7ea9c8920743ee23aa8fae927f5c43b6a20a6671ca5fcb2697d179b46. 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/GBKPL1829120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4c99abc76d3995d8f999250c93f2753ef9558c767c2c5a8702063e144c6af. 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/USHM91995122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f1d28c17b33bdf925fe428b7f68aa387ec63b519a143b52023cec15f93da1c. 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/QZTB22302704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd52962c2ade02142979447843af74679e240782300ea3ff8fe1ef148c388af. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTB22302710.