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 0xc04af5b5dd9eeb37e8dbb03a25220c28f04e3270612065c70ab6c9437efecea6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ddbfb2e-92f2-4e81-909c-ae719233fc47.json and https://artists.proofprofile.net/proofs/artist/0ddbfb2e-92f2-4e81-909c-ae719233fc47.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 0x8654b072ced277d563ac41993148837c449ae01d355546b5ee666796276daaca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2134424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1686b7707799dc2f6467593be1960293fe4a05f687f7ce746403d7fdcd67781. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:42Z), 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/QZFML2134427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba94c72b758b3af5373dc208b3f31649e7cf634d2658a27debcf2a8d5826800. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:19Z), 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/QZFML2134429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9161468973cf5cbfb1d3e5e412ad55b2f81d2604ec437d416946f322e5110fa0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2134431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b2f31b4a6282166c328f289f47f203b9b9a0ba343ce0d031d1e5b5f7141ec8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFML2134432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe465f497a664fab0633db32ddcc2267b90cdd8762687a39a6aabef2b36be78a2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2134535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca07a75b72f19f57b4e182261c96c4a3961a539c92e32ecfc7f62d91f91c843. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2134537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e105c72a05950fc6ec71aced52e5e94dc748283eec6084ec9501f851fed34ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2134539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d0071045eced923e1ac45d542c1fc72b843411e5b7e73c0888f70e0b049e58. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2134540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4223539d811ae295412c68e50998788b5b40d275f8a1f5a9035dccd276b92e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:10:51Z), 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/QZFML2134541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7707c7018ffca986381b72374db421bbf79f14ca1e3d9458c8d16aab4a2be854. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZFML2134542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138bff43256d461b5c400c64daa5eef4f28e0ae77508df1b6db9d16ac44b521f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZFML2134544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f9fdb7c00bef8dd0a8f48d06ec81135a4c9d2f68289944606f0a9dae3bb835. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2134545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7093f99b289dc7047563170fa54130ef5bacda47673834e9e6e54651284a4ae5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFML2134546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c498dadc8a63b6671d8d33751a67437b3d622fe2fbab5422231129eb6061ee. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZFML2134547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e281cff02a3b6cf20501251135c6939a6e2a771b8514aebae903da2632b11ba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFML2134433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338c97a0b9a66c1d4d49e852e6b156f1c13e6146c2ad8cac24d162cb803e8322. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFML2134434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12fbcb6b55e8e6dc3190d7c44a332fe0c974deb054835287fc4b1dc0eb1b1e8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFML2134435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9098ca31f37535099e09816688cf1c225690cb6320524a6fa343445a3f3e8971. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:20Z), 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/QZFML2134436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebab72667d1b46f5ab179faf9809e65b8c4b8755bf79a82228c32915e2df4d99. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFML2134437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16ece81c4c128bc344d03ad1a20f2a4f965e75780edde2a55bc264e8009b89f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZFML2134438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e1dc27983c1eb03358fb59af905e42c62e061948d19766f15d90827d7df528. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFML2134439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac16589e73bbad2449f5bdb15a5db4c151f6f7cd2806fdd492be6f693019c890. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFML2134440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe463336c47b2d5b69fad00180bfd7441342ac3e4e7adeaa0c7fc4b7852ff56. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:49:46Z), 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/QZFML2134441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853d833b6cc6e6157e6a3ec6972429c8b521ea2613ea613282aa4d5fe14c0a88. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFML2134442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c71c0bed3ba607c2e1a23025923394b22de659c96e262596f9bf9e9cd6c75. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFML2134443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c76b36473220d682e22413af4aa9bac60bb99acba8ee3f7f9507cbedcc8245. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFML2134444.