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 0xcde15e6d5a2e31db1a9944872db1f5ce8767c56d91753c221ce6be261f12a7db. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7edc326c-d500-41ad-9db7-e92ae5d8ca5e.json and https://artists.proofprofile.net/proofs/artist/7edc326c-d500-41ad-9db7-e92ae5d8ca5e.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 0x332ad9ff30b54aa413da28657aeaedad78e65d5205717a6c32ec89eef7c0a9e6. 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/PEBQ91503940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65f4ca2b7075aa9a4c3d4c6dc26fce2dd7cde477bb8d50aa9073f4927d40e6e. 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/PEBQ91503939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9ea6f5de8a5387479494271b86ca1766330b6d4945c73ea1b79d5defacd89d. 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/PEBQ91503938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213df5c4838b47edaa3be459d11a968f9888ff4d0512a725e9b291f0a934f37c. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/PEBQ91503937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbe45320bfb0d515d36334887f19553d7831ba8decdb7cafc368f93a003bff0. 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/PEBQ91503936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42118b144a4889b99ebfc2fb2b73c9fd28ade4bc307d57f573432b5b5ca33a8d. 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/PEBQ91503943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe49ac55d4024b8bf794002a690c15a8ffe635d7db168779076925e7e78dccb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PEBQ91503942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfd7539852d61ef2afb0a3c663111c45338f2aa5ab4ce6b7d568d495a72d34a. 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/PEBQ91503941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4081e7caaf888a8834d2ce3c692420b1594921c1c2f1d8488b96301aa670282e. 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/PEBQ91721756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb2f623093e5831ca82acecb34807ae26814c5296c35e41c953202b8da4e80e. 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/PEBQ91721757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd928f90cbe1cf1d9febba988c2ffdec0f0c3639dd1150e2dbdbe721256822c. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/PEBQ91721760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84eb3a119724563f12d9b8b340fe82359c6bb02adc7f1ec8849c9800ffe6f12. 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/PEBQ91721762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594e4510dc82b967ebea5603424cdad783d5c07fce340b0298d37b2bfb8ace72. 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/PEBQ91721763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe504357be548bcf3ed87cc46951820b7a188cdb626706bf74a29bc493f3c02f2. 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/SE6HN2026662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3572b6ca22ae03322061c42d0194578feae4c88f6e9d014abf98bc6cd0b62b. 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/QZGLM1905754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d91533c46fa15a968bbdfdb83e9092899e538e1b5ebce2176b633a019f25a49. 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/PEBQ91504764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb9f106b47ddf85252fa3f42745398816feb06ff254df11ee3f72caf872341a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHZ42007491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81d3b4a690164c1baee686394f8d5b119e93337b8e3ae2cb6123413b8fe985f. 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/QZHZ42007492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90021cb6934dbbe3ab4d21df8f4c38c773e1614df0a7fb30588db8cd34f4c123. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ42007493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11edc44c7756b9a465a0b27c38e96b84724959fa37e205a36a16007e28e8fc3d. 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/QZHZ42007494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4e783cab99bb3acf5754a9a775409ac5d3b7f9df28fa849f234b4343880fe6. 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/QZHZ42007495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e5fcc298fbc7178ad64950e9647fae6c5bfea87ba8c8700e7dc7df4969bc16. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHZ42007496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d1f5201a561df0ff2fab8e011921fcbe281cb6e9e9bf17b563b57a2bdb71d3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHZ42007497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f8021b17401669920569727b1e2946ba80bd53cf3f252bf7ff904d043d7386. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHZ42007498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36be11ff6e85da4a471d9bd4abb9ba5a96b9533b473e171744eb6dabc33d5459. 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/QZHZ42007499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd04840798a07335d809645b79217837f7c099da802cd18e3327e30a354242e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHZ42007500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52a97d4066ba6c34f407572bacf2f08c072896b1405f05d1a31e4da403eb167. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHZ42007501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703e72fc032b245ebd55f5177d9629caf673f3df08dfc62e837e988246ff33f9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHZ42007502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8d0c524d1aab3b572b875da1a2ec37591435d80d53437836789b5eb346b7f5. 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/QZHZ42007503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d08bf4e5a3822bd81cc1ce781822b823dd263733f3097fc5016ef831fc75803. 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/QZHZ42007504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2245c4254de81355e1e63cfa0f900873537bfb323dfaae948dbe4a12be6839. 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/QZHZ42007505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76fd4501fcae35b347956996a1f6f1ddf273b58a6e97203611290f93e08da1a. 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/QZHZ42007506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425e3009d8f5ed7d514ac32d81fb48c644c485507a53593c55fa39823575bcd8. 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/QZGLM1905758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3572b6ca22ae03322061c42d0194578feae4c88f6e9d014abf98bc6cd0b62b. 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/QZGLM1905754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30249b5a0ed3191d2bd1a8c901814dcc825276727b786c7754cedb84db92e54. 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/QZGLM1905759.