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 0x6569d1742e3dec365ea9b85d3ed8e6e99a27f46b0ac6846ae454662e0461c2cc. 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/fcae4c5a-5b23-4d92-ace4-4aecd1325eed.json and https://artists.proofprofile.net/proofs/artist/fcae4c5a-5b23-4d92-ace4-4aecd1325eed.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 0xc4a575d1c65f534f3184929760c0c28cf874221fea7edb25de1c4f63dc1f0620. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USCGJ1211334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1d68f0817e328f4cb42e83720b089f32e2f3a12ce1330e9e40282e9d76fbdc. 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/USCGJ1211337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53a86cf697299247325d81a8bee3b623a01cdc3f751c51cb68d1bffebed2b09. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ1211338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e1992eb375437de8cd5a947d0b422f8e8428165f6a62b52fc8228d91e04ab3. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USCGJ1211339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3b12e713f3c0b9485b1c693f9303af8c8ee48a288d0155940abe60ff2a7180. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/USCGJ1211340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ceab2103565732a7355067a73a9574633e5d8ab0066bb7317c3858df916932. 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/USCGJ1211341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c57f8176080768a34fd9241bac24442038e168fe65dd60a8d6db5fdd5f2a052. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USCGJ1211342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a18493101a38867a5db270c87717a4b643d77b88cd14738dd604bdcf66a705. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USCGJ1211343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2380082d764cd3f1ce9d3cbbbc2020c3eba9f7aa4ce55d43553532786c290f0f. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/USCGJ1211345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f600281712ba066c6b2610333f87f5eda1c2fafb962eed85ab83889ba3b25d2. 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/USCGJ1211346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d37b6ff92cb0b82e7d1d974c20cef40b90851b556a269506a65268da671adc. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USHM91223888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8596dc673e1c4cbd0d3afaa83e0c520054901199c31c6e0073771e3ce2fb9c2. 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/USHM91223891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cfeb6fdb96c067559baeaea32d2b18742e2f7cc931727159aa53b66f152c67. 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/USHM91223893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0969bbf42fa9336f833b8252d7648896ef1d0d3f48f9342f007abe0b8c1d96d5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USHM91223896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4736074d0bda68f3e4fdbb6fcc794816d021a47f67d82888be162b49f15dfb95. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USHM91449362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0aa915743975af74d2a0767e2390bab476ebfbc8906a22aa52ca08f9f5cffc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USDY41767978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf6778ef75ee92720148621612c6a621bbcfdb883fc98f280e973bdd5bfcd7c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM91780694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78119335052068a28b791a8dacf06cc0acf45a17b2a66d992f88940641371530. 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/USDY42075373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da2fd0bd7ec589b4248d169455a3920e1035ae104094130a5b2871491e64805. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/MXD782004182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a2c9250fe5a610aa06926368ba885eedc05844acc70e3768d090d2bf79cfc6. 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/MXD782004597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4b2359574d71ab7f92dc5b5caa923518cd66900785fb19f9afb13069038bcc. 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/MXD782005307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452803766aab8be955b87fd776d1940bde8ab03f44b3896f116728a8cbb6c9f3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXD782102278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14e1cfe38221cd52c613b64fdada99f684e0153a4e36ca05a9661aace69d987. 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/MXD782200473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0499a6d08eb67e036913b631ccc46749cc7384d7502840c3b8d2d594dedb6471. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXD782200475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81123d9a858ea4d65e7aabc8734b1644caecbb9b8d8ca713b3ffe46479d14f3e. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/MXD782202141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c0e66a16cd9a06d118612cb174cf869218cf52b8c308b4791148e454ee9b78. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXD782301149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d76dd2369503dafc2d246f7f2a458ed092443c2e4cdbe5d072f4ec4675eca1. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/MXD782302146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971c4903c30993f4729150bb6c4288e36ed981cdf19d6207bfbaa2d0e75b14c6. 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/MXD782401071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77906856aa56fc1f6626fcb8659b60e059ab28ab954204ef1d7bc6990b71b9bd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/MXD782500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742f34f4231745e73327917066e10233c66dc2ac9c3bf0b9489aeaec73e04b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXD782302415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829b775e0c8c184723084c8c06e7b504b37a16bcd7d54dc983688932e13a954f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZQPC2100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d16e6669bba4d8c17234337a32b6054f47d0b402a5ba6df0ed5b58a088d180. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2235168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6852af9c735437b3f03aa8e75e9a4dad1f027454868c6ac013bc1153eab1b36b. 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/QZMZ92331031.