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 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
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 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/QZQAY2475385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2262f1e558004476f92e84920a2b7a6065a1748cfba062d5a2d4fc70f4cee079. 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/QZQAY2404565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efc46643a834a861db6c31799eb40d6b001b7f3da8346f280083a26cee4aaf4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZQAY2437054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01200e5a6d74b10810e7c5398b84a67024ceed81138ce116824f7b4849b001f. 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/QZQAY2443135.
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 0x3c435f6e98c716df281e5c0196ec9934fd251669e8d22536999917bfb0fa9cc4. 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/USQY51121189.
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 0x0434dec066a4dc9f0afa942874cc7dbcc6ba949818d8ac8fcfbaf1d2d081feca. 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/USQY51121194.
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 0xfb378ee072a6048dd976360ccb31c88b337bf55829f7c11aace8b54505768d46. 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/QZQAY2467482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385eac19134bc34064794f6bd4b0212c1c4c156fc9d3f7470e62f24f2d7f57df. 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/QZQAY2446205.
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 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 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 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 0x53f3bc7381d42fd8dba7146c1d28697db8f09664019debfe2394adf1d2d000b5. 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/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 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.