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 0xacf17a5cd3568defc2f783bfc57de4a9fcafbff908dbfddff0b0cf8a599bd484. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46a5e0ba-f079-4cd2-a6ad-cded19fe44a9.json and https://artists.proofprofile.net/proofs/artist/46a5e0ba-f079-4cd2-a6ad-cded19fe44a9.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 0x157919f669ff5dcd4ad318ba3248647041669318486926031886bf28439d7565. 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/QZK6L2111580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa089408cc2354a0faf0b4ae6f9b4f0c8e0e9792dc199994cacf93718cb40ba. 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/QZK6L2111581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf028ea2acc1f24b9bcff2b205c08078eb94469cc4d8a53bb51ba3842b2b7b9bb. 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/QZK6L2111584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff7cdf620b5942a43be7e31979bed9683b42933a3194132eb331d67fb8689c3. 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/QZK6L2111585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e175502aaca992a022be381f3a7660e157b1b1b00cffdeb3a0e631d8cbfefc. 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/QZK6L2111587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ec3ffe0e800ec7350f1c2c19955edf039a10e4c410c0c5966389251b706bfb. 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/QZFYY2143365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d23a54e46b28163e3916e18c279edc03cd98b0e8a0f64a657810dd41b6a881. 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/FIWMA1400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8642c19c4ac174818769bae17d87e1f95ca6a94ee0bc4a5c8dd694417b95ee43. 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/FIWMA1400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d99e9a29607acb9dca29f46f8263a231b8445a24de74aef7ae7d7a0b5b5ca8a. 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/FIWMA1400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f2368fe3014938d5ebedc814de8c7c28929d45d984e78c593e86ceb00ebe6e. 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/FIWMA1400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238ea83941ac1cec00c7a649b54e3544bb905cedd9d6b86ef5a5f0141e68c3e. 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/FIWMA1400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359634bf1fe2d3eaf0740d9cf2e386aa87826c07c5071204b3fbadfcea3956fe. 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/FIWMA1400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f23517dff3998ee712ea605fb2a9a6aeeb0d829b97ab319c64fcaf9bfa7b01f. 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/FIWMA1200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ec3ffe0e800ec7350f1c2c19955edf039a10e4c410c0c5966389251b706bfb. 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/QZFYY2143365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a618fd447c12d40da75889fa85ccf9afe3f1a5489c8330be3655d5aca8f34b. 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/FITFR1700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249dd329c739c010b2a3755f89a14170e7f63abbbea6c275eb9bd57b2cfc5e71. 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/FIWMA1300519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b70e0db46d0371b2a57fad7f5a0465a1d04e60267b0be01ba7057b7ca2abd0. 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/FIWMA1200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab5e0417af34f314cf6cfc6e9b7729aed86850a9af3712a80d834729499666. 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/FIUM71500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a3feca614bd62d2e6b6731e8074e06d51b0c7ed3df6f03e85b13d30e7b5b81. 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/FIUM71500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb6f1dbb08293f5d3d42f40ca7d9bc81b02800fb2bff7327aa5f31b109dfa35. 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/FIUM71500273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4efdb1aab2558e12e3bf16781f8b00b438118bb052fb5fc95649fac50cf2965. 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/FIUM71500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad8adbfd584735e96cb310ed36951c2fbcf2b911c16b2701b65ed979e4c64d1. 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/FIUM71500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075f919f4f299232795e7366df712588ea8cdcc1b949c65885198fb0c130a4df. 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/FIUM71500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d21bf23862312aac7af0d85c2a3aed960df72c94542483a59cbd5d573d09b7. 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/FIUM71500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd216439ae25e64da946d5cd6f32677cca4899460d558d46b142fe5ff8929d3. 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/FIUM71500269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c303560f77ec2d910e3da037481b302003a1044dafda99ffdd79bc8824b21cc. 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/FIUM71500267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc49a5b7a3ad7c8ff9902cbf65d2166d0da89db4de33a1da42fec0403fd244. 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/FIUM71500268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c1242ff685d4d559607961f6a61abc4e99ab054582fb0aabeee0e354f9ca6e. 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/FIUM71500266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f66e3c8e939d34670aad9e5b965f8067cf061aeb8e78d6e5637a5632edef55. 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/FIUM71500271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda2c0d7548d7dd448873856c71175d008a48d2b03d5dabfb14d1bdc8deccda7. 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/FIDBB1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92787c8e314a2055f297212febd665c0caaba04f1b9be8ff95ce8e6a303ebf1. 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/FIDBB1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4723ed813a0af9d6c4b096a9f89aac11fd5cfb0eeaa1c379193ab1dd5f161981. 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/FIDBB1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f668aecf72eb1d163c00e475db04956e465222fb975e4926140b3c7f7e65a26. 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/FIDBB1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f1809b3eb54884c860cf078504c3fbc754c25f6b3efde86e6f3139579f1dbc. 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/FIDBB1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7372a41c4284d70a69e71979347cdfd7f60ad70130c7a8910072bed378a58222. 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/FIDBB1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fdff0903887b267ee4b13d58eb8140682425b2076715d63b01ee46ecd2c657. 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/FIDBB1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c64edb998b25e6577ad771f5275aa5f130df224f1be8a5805caeb071d0ae68. 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/FIDBB2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47503a34e762b6e67d4a87e8b4751fbb9d66e85a951618f0cdd3e4a6f72a82. 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/FIDBB2000001.