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 0xd6fc20d434839576a1b92884f328eea905a182ca09643f03b97b4fe3445223ab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b51e866e-2794-4fff-8da5-7977e17b42e8.json and https://artists.proofprofile.net/proofs/artist/b51e866e-2794-4fff-8da5-7977e17b42e8.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 0x5b8112af700fd44d72086bfdb6d03d1bcbbc75e2df9e296c44e605dd39a588ae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR26V1422304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612396fb578e67fac1ac142b256568ea1dd4f92fd19576fa43f2fa8162dc9f7e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FR26V1422306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150eed22910ebe963cd6088add874c1b9989990d64cf889346bd4c2ce19a2fcf. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR26V1422311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586ba7e08ae0eb16d7362e97b781d4b3e8e61a6974b9bee39734fe2f0b467401. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR26V1422319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca97d82eeb447d1b376316529dfd34bb43fb60f79da35fb7932c279e6a2b66b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FR26V1422322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7570b0fe78deabf9123c9e35e0c5510b29dfd946a0a46e34603181510b5522bd. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/FRUM71702279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03de6a25ae389c0021888f51ea91272b0a9eedac058bbc0fed44462f7239e915. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRUM71702281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c00fdd35197109c7de148b1bb7296d9d93c399874db091739501e88afe50536. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FRUM71900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb58705cefa9454bb18407a10f6663be241ab04c439cfe5b9c22ac91a238643f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRUM72000512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e423f4ff7421981da30387e578f8644272c441043b354663530d4e9102c9b4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRUM72000707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5db27f58473c2b757f0b85f264bde61964106ee48dd18ab1888356235a1dcb7. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAFL2171065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2fbc9c5ee2e19b89156a9846852bbd93a872183748997fcaef80507c2a3eb4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAFO2194886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a717a3ef753a7308fb7d83eeb20622856856ce135b7999c0a6c7d172e00ee52. 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/TCAFR2141740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb97fd494c67c15e69bc3b473e86add9f90ad1076e5f06db37289809dbc059ae. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAFR2141757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb946df3a3387d767a5e2ab157854faa76a09f24b172ac26614dd34832856bce2. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAFR2141765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc150e8b94eb4599972ee8b9ff2feb48783bb1cc82545e7e88fca7d8128c6cf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAFQ2179359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2bbbce44f167fcfa95567a1d18845b3ddee3aeabb9f436ebac885f7f33294c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCAFU2186289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2bbbce44f167fcfa95567a1d18845b3ddee3aeabb9f436ebac885f7f33294c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAFU2186289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb4269bd8814e46a4046d415712b093669f5f13624d333048ba5f6aa1b59518. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAFX2119047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c9af30023d8c16b5f92f6a8e857d28bbe6ae48d4e7f1e7140ced8752e16acc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12227822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbadc0606e54bc649ed11d1713150040a0866dbf95a84a39a41a39caeadf4be. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/TCAGR2292040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6a16b9f0d1d2983a553bfeca96f17f8826f65f30aebf10369ddc2b06f8e1a6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR9W12318409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54b51d7222112e009e8823791b9e038edf75df6beb865cbb9d5b5327d56efe. 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/FR9W12318410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e61dac136797f88d121aaefb48424472a10abe6588e4162f0a0fee834c81af9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR9W12318412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54b51d7222112e009e8823791b9e038edf75df6beb865cbb9d5b5327d56efe. 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/FR9W12318410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6a16b9f0d1d2983a553bfeca96f17f8826f65f30aebf10369ddc2b06f8e1a6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR9W12318409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd63e022c2c4a5bdf7e9e751685be687f8c6d76afb4aeea38e98abbf46a15dc. 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/FR9W12318411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9256727617abc6544342346ad8f7fc6bb7a30c0f2e777777368e19a207f8c8. 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/TCAGW2361000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f321c3a85d56857865068faaaea1c6f9a9ff9c53877fa75c792e90e81d39ee3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR9W12318413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0d065589205525df9dd44477295f566f16c8a95e145a2eb835178687d902eb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W12409568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462f0b217415aa14e0c5b4131063f2cb623772483595b7bc65d956f091271316. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12404042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0e483cae6ac4c2c2f3ceceb6a5f0789cd5ef0a3391a86640edd6497b83bcca. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/FR9W12409570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb76125ff4b565946a7a796757e0edeac1d780b17c8d0f8b6901d8a901266bf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIL2474027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beaf2f24873b89210d80ad1ada2276752dbc07aa882c2fd5e22888c62cf616a. 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/FR9W12364261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6f39caee0f12e3bae35ef3820e60ee1c127ae6e2fc319fced50f27f9947069. 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/FR96X1682996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a31d03d576778fe1b47e7470c98cd1a8ba03441fe1debc82e47387b386f6ddf. 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/FR9JL2200130.