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 0x86e8018919263c7f5745e1b1d83824ef36b452eed1da10a161f24ce3d597e94f. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bca3f61b-1594-4573-bcac-3fccb722cf91.json and https://artists.proofprofile.net/proofs/artist/bca3f61b-1594-4573-bcac-3fccb722cf91.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 0x5b3e65dad727c4604563492eada0b80995c03e9970ece1c4a3d81e7216a815e9. 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/ARR6V2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccedcf71e88be3b479c9a75bf199e124e775935d2e6ed16788e46d325a92d3fb. 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/ARR6V2300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc270422aca226bb2c27bf0751278bf95abdada518f8adf6d4506a624f04ca2d1. 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/ARR6V2300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3625c12527665f4f3c460c7a5cfecbab9c991be42387f6968cd6573ad6f1400b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ARR6V2300116.
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 0x67ccf7ce8155a39fcbb44bc98121df208e9e36d341f8c336608afbdc44521599. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ARR6V2300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0c21594a94fc82203126d230af7298658e42ec4da6c7da20f68901b269e128. 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/ARR6V2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8e2f7e3b1de4f1c82d2d38db8bdf8219f868ee50e8cb916d42978ffbd49a6d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ARR6V2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3456b85516723d145546c0d7e0ec44332e65d1efa72cad8559157064d40d57fe. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ARR6V2300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8f0488b1bf82e7ef961cb9783670da0ea8157b91fec88a723dec7f369882d. 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/ARR6V2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6076cbfc48bf8d9243eb668d82f7d2da3b5bbffcd44347adb8cc6cf0344dc400. 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/ARR6V2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663de0af48483ba9e161889a8df055fbb1c113ad011f733e9c8fda8b6f1bd4bb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ARR6V2300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab721ccfcb545adeb83cd00114e66241d3e434bf41194fa81bf350503fcd13d. 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/QZW9K2329541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f83f72ba9f0da3566ebb7844ffee1845c25b55b71978de3ebbd8c8cc325c52f. 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/QZMZ92227847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed839ea90d85f98a106a62af7ac6af8b53261823d32b4a285af9758c127c0ed. 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/QZNJZ2281486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc005c8d5040739d1c7c73eed6eba0d7b4328b141ebb61c4ab7844655b37ed173. 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/QZNJZ2281487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4fe8aa9d8e0d51ea97d50094a4e47b9bea1ee1180bc6311ba27cb1d4030899. 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/QZNJZ2281488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf234b6f042f179627a0aa17d7e4eddf2fda75154ad645d283112ebc08f72f877. 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/QZNJZ2281489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948c58e0688413a4b454fd21f2a77c606be82e1affc312eb0da9df1727ba1d3. 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/QZNJZ2281490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c973658e2119d1813bc1e0cc1882d327d7b70705d68535fd2318a2c93c7536c. 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/QZNJZ2281491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb446f3b5760ad20c886202d56fdaa25b8d4c7098ca91fb22b0926365198b3312. 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/QZNJZ2281492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9cd4082754100c41358e4923d09c888fd6b1867b3de7b0ca69bd58a964a50e. 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/QZNJZ2281493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cd03bb4b132624156e727ade835cb2da29343c97a5efe39fbc5660c3705e40. 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/QZNJZ2281494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777c2ca7cfc9087f7d6729e6d3c3d50afaed273a607acf33ba99e7b0b2a568bf. 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/ARCJD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ff55a9c4110e5f0b11483912a70fb6cf9e35a053c674589b6e2d1199aae5d8. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ARCJD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ea62ab7c19835964e7728d1a57b0fceaa7783ab94b74051959c3cd2cf2808a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ARCJD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b2b10e3566bfbb7e56c4cc2c7a479476c139845e9a3c6c225153736f0ce023. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ARCJD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cb200efacb850064ab9973a3b23f667b364e27dccb273463a6d6374ac2c24d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARCJD2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71fe0254ad12d163ccd1186b6a91957cb55a7d163b5f9ba310e63e1eeaeccf5. 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/ARCJD2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14ba2e7bcb5f73ec7ec66a45e764f15a6edad7db7212646d234d0095cd24359. 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/FR96X2192790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5ded24513ebcebde65b9f32dff0650ad1864871a2987c316d13462c569d74. 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/FR96X2192793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ec9f44eb5a4cf4516b2f491d4bdb0ef370e983ca54a03dbe35806a7a668270. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR96X2192791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7dac8a685a5195eb19ae5fea39e25d26f8a47c64fba89d59782b6108b02f05. 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/ARR6V2100316.
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