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 0x760de1ef80a9379863e4a934df966f46a72795b73e6277530cfa603d5cdfb312. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f5735ee-01ae-4ffc-919b-e2125643a707.json and https://artists.proofprofile.net/proofs/artist/4f5735ee-01ae-4ffc-919b-e2125643a707.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 0x4c3120afdcfeb6b005b6e5b7acc05538578b45e829bbcab0afccea94e240a372. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZQAY2413443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57196164d880d5b72133c11e6b2a868652ad6b2baa1bf5f1f90b02a024f08431. 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/QZQAY2475385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc84f61043f944fe1fd1e5b8f9e6e48b9319433a01a12b6b0c0ad5dc8734ab1b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZQAY2453530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2262f1e558004476f92e84920a2b7a6065a1748cfba062d5a2d4fc70f4cee079. 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/QZQAY2404565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efc46643a834a861db6c31799eb40d6b001b7f3da8346f280083a26cee4aaf4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZQAY2437054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e213c187788130e9b3a6f9605a34d2745297179612d8df87be361f9a01eb39c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZQAY2411927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fc82dfa9993f3d9e6d1d84e55c95f94f2f580076edb5c24688b0d91f6cef10. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZQAY2429945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01200e5a6d74b10810e7c5398b84a67024ceed81138ce116824f7b4849b001f. 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/QZQAY2443135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c4cd890e0cd2171ab28da1a749aa95cc80c9026db60110506339825673d224. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USQY51121188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c435f6e98c716df281e5c0196ec9934fd251669e8d22536999917bfb0fa9cc4. 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/USQY51121189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae00b51187e10fa69ab0dec5ea343510d3c2e37c5adc45e378d3bdccd69736eb. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USQY51121190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df4f89b3e517e3375f07f7ae244575dde57664d288280e1415c1c06f8117e6e. 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/USQY51121191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2019b58b54ac327c795d9a6de37a2163b13c26669c76c589820c96e36b9b5f7. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USQY51121192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae41c8b52dceae61c9b87d7b583e631d06d93513da7fce4228f47a957254a309. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USQY51121193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0434dec066a4dc9f0afa942874cc7dbcc6ba949818d8ac8fcfbaf1d2d081feca. 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/USQY51121194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a5d53a7e83e240b635ba5f229adc4ef53019494b03d6f0f3997903042a9ff. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZQAY2499852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb378ee072a6048dd976360ccb31c88b337bf55829f7c11aace8b54505768d46. 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/QZQAY2467482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7c4b879370f2843221d670a57df07f60c6d05729b66b7ed6534c4a0e9f9bcb. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZQAY2496806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385eac19134bc34064794f6bd4b0212c1c4c156fc9d3f7470e62f24f2d7f57df. 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/QZQAY2446205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bca14b9822aaa5509b06f748f3d036748287b92ed24691b447b276a7aa1bec. 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/QZQAY2406118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bca14b9822aaa5509b06f748f3d036748287b92ed24691b447b276a7aa1bec. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZQAY2406118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd6317beaff116fb36f5f057b53dcac9d425b2f700e48ae694ad618e039bd90. 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/TCJPA2443441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a92f1d92b03e0a59c32f9ff52f5bb56fdf4964e5564a9baa7ffb0d47b25810f. 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/USCGJ0821174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19eb3367fac6a4c8e2c7df20df27d6482efbc34f7258ee90332a157bc372ddf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USCGJ0821175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c81f40d0ccab57485b2fa87383baf5cd3232594f6e7a8305127a04a16f941c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USCGJ0821176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f3bc7381d42fd8dba7146c1d28697db8f09664019debfe2394adf1d2d000b5. 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/USCGJ0821178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d2da4443804883c254f0403107f530d25e7c1db355b88009ef06576c391141. 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/USCGJ0821179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc1b4366eb4b9e6db841f44b737a308b9cd8ce9291b999dd42081b8b771d51b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPN100900518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c72972e1160dae83d21e6314a7a80a703cd5c35287f277d29bd20a07fa24da3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPN100900522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8fd315d6511851b00afbae6650a5af55bc76025d526f5257ec7593bb743008. 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/JPN100900523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b54d4fd10c730da7eba53490b5e7fb5badb0e51c1e2af16166452d7e54b822e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPN100900529.