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 0xe6265fa8348cd9ea47850e640e0815c3e18b1796e3d599c0f91f2fcb16bc85a6. 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/77fc72af-6fac-41d5-bb62-6bdd1db8c875.json and https://artists.proofprofile.net/proofs/artist/77fc72af-6fac-41d5-bb62-6bdd1db8c875.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 0xe5e45b604da043396ce990aaf94916d7dbdc5cfc32f989e88f6fe6a5bbae74ea. 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/TCAHL2399943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fc9fed8c6e36758640caa71ff01337dd106f441f33797a56331da9b0b9428f. 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/TCAHL2399947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d2c49fd7bb5318ce70def3febdaad20b37dcda53ee179921ab796580788169. 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/TCAHL2399959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b8d6a385bd629a21f97a338764d10c8ff45a3efb0c63fe93157d9d9cd44bb4. 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/TCAHL2399963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88cd9fe1a96beb886f52ebee9da3e6f0cb17245fb042b257302a22726c53818. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/TCAHL2399966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d0672386e6c3129ead6f11adf0326ca044095bffe3ebfe9fff2b05c19a11bb. 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/TCAHL2399969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347ca23f70d5f159ff0cb7302190e25302c53ae47063c6b368621f9ce07126ec. 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/TCAHL2399949.
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 0xa4478d99069ee802f9a5d7a6dd8a5aacf793d9417b583af7bd3d35e265821f5a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TCAHL2399952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cf290a88eb5656a107f0565e9f2a16175f64809b302b7074af78773ee7b398. 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/TCAHL2399962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b8bb0b5e55357928cac4de8e25e110836d2d2a2b4f17312e7e320d20f899c6. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCAHL2399964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7cacd5dab0248e153b51101fb48f9e4df6efcfdb18ba4233ea7120520f199d. 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/TCAHL2399979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a06f905ca6b4906b9207ad134ac530c1c26c1ef77a2503b84cd6d3eb2933f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/NL8RL2316639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2ca09806a416e3d3687dac4589ec5c671e81de680aa20e0bdf763a7f3c09a4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/NL8RL2316642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da599b1b05dc31eeb72528da7f52eb0ee7983d23b29edd438d69387d7e7b957. 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/NL8RL2316640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2476bf4cfcd2f1033138b00a2f4cbd7bf6e5cea25d91c111a33043fa56daed9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NL8RL2316643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250697aaa5a3016b4e115e29bb60e6c88757c40528f7941caed55358dd8d79ac. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/NL8RL2316644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01292b1a9d5d3007fe01b09f3e87e3bc16770ee38cd6bc8cbe6e320f9c9f48e2. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/NL8RL2316645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a97edb4f0b81e4f995fa4c28e3f465bf1808aac5f31fac25f58329d80eef0c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAGW2384898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd5c69b23118de7891d5f4b582a99dbe1d2ea0d66278c6495840f8b1e10ffa4. 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/TCAGW2384936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea6c7007ed37dc3ade050b4436b395b3a12a57c0b8152dbeb379c279d0aceb1. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCAGW2384884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3a72f64d71b776e2cbbd8a929a385113bc25ee0b64644004459f4cfac267ea. 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/TCAGT2368774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fa81c90f67ed2605781f3fb0bf1c10d9e570b6f1cbd80bfa647d05a88c5d84. 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/TCAGT2368784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c14bbf211aa341d4de34c5d4328a86abade44d9dc0ead51a4f3d4d6ffff7cb. 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/TCAGT2368791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309a3a950d63596094310945b0a6d43464606f1a52e0ffc630c6ad1f2ff4949d. 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/TCAGT2368824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dce5d6742dfa0174030c27802a1a7b240a5971b54aa8ea0dc554d760d317cc4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMEQ2212180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc94f961b1bb0cb7966ee5dfc27a282acc0f9320c45dbbd4ce989ff725c131f. 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/QZMEQ2212187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb580eaf683065c166335e5456368473260bba650f00067a8319b0b04c8ba3e96. 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/QZMEQ2212190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f02a7f10daf7f4f8715a147c4cbff909e06d23124ae147284edad2dc312bac2. 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/QZMEQ2212199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3532cc30a31f42ac8c7d3255bd59562e74f1019410a04e85bf704958c5908f79. 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/QZMEQ2212200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa325bb731429d02db1dc60d138b7df8cced6b51dadf30af3254889460988aa. 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/QZMEQ2212205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8dc0fcf04e7ff9dee408c11ec56ac1ff7d5c35c83736da75231b8d13c76bcd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMEQ2212207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785cd8c8ad687f164642d08dab9f19f50b3fce3aa154f79fa1703c022c982e85. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZMEQ2212177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42afa765e081aa3d8ee54a5964566caa2398b557a1a90a90b6f8ff0624139d0. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZMEQ2212186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb0506bc85ed87b8012c1a268c7f1df0f2fe8f6427d180fb42d32a1150f4b5. 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/NL8RL2303438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc93f606a7f93a9ed74c983db820bea4c7107389b1bcdc7747aec04a923c4a3. 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/NL8RL2303434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d770bcefb1846bbfcd5dfbc48d258790302ba973cc6a36ed9a438baed0e821. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/NL8RL2303436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52926819a59ec6000b6059cafa39dc4633502cc1c70745da61b96f54f34a30a3. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/NL8RL2303425.