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 0x1bad46ced73d3d0f87e21c52fa31b02e2cd2ae6aa3f3fdbc3a05a3d176cdb0b1. 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/19d2dd6c-209a-4660-a502-a1f85320b28d.json and https://artists.proofprofile.net/proofs/artist/19d2dd6c-209a-4660-a502-a1f85320b28d.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 0x804ed5291396c93516b480922fcb0aec6a7f4fe916c15c9d507cc406725b85b3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6K2200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d8089f429892c69647c24f79caf39e684f690f6025c87b9cbc2a9c95ce24f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZFZ72322307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f747357b35fee9043a513f20377d7b3deaee8fbddc8b82f58891728f3430ce0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ72322308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e6722171a4e60c90d3dd734ca566bcc219c86787ff8c8de131edfa4aa536b2. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:56:05Z), 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/QZFZ72322309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b648df1bc088b6f2bf6ca5e9e9308cc34a5cc75fecde02ea5591b65381faa0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZFZ72322314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d244318ce1fb76a16c6677976b6941fd09c072814b2a7cf8aeb8d1096cebc1c. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZFZ72322316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec46858715e5d59dcebe8fbaa03dcc86c76ca339f65346e63cfb643235debe5. 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/QZMEP2396984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b7c5a971e5607e7d2d0427c990fe80870e174bbeffd66bc1dde9706d6838a9. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZMEP2396985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20848525a66e1b0dd658d121bfac7f8cfa1744b9a5d0df0550768c4313ac858. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:42Z), 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/QZMEP2396991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0218d1f0809d4a4e98c3becf360b8c5d74854c81eac0d76957070008ed75ef. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZMEP2396992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ea339430bb0466e33fe22befd609aadbe425d3b7a7d03665b41a5d34c30fa3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEP2396993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9000de97566fbb97a359333e1cecadc477e5247b9047cdb6c1d601d2ecaaa6. 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/QZWFH2348288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed36359cf29e2d2f134f297f9aeae344d4993a39c0824ab98dfe0125a47eda7. 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/QZWFH2348289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dbae28053729118dab36ba2679bf0b7aa8c97fcdab5a59721850981b916c79. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:29Z), 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/QZWFH2348290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6fc709c79f004f43c9ebb8c671df60fea3c0674e95d2728ea793513897e3a6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFH2348292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66c8c4dc91804c19f28a5ed7e4e800637451b1379aa15f77302e74490833372. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFH2348293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716551d248218346162397784a2f982d7d544e3de20368afb54a2ca6cf0f9253. 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/QZWFH2348295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739cdeb3bd014f873c609c1844456db53f29c1a9cb2d1e0dfad11ac32f6b3bdb. 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/QZWFH2348297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5fd7cd62215bfa584cfcc42d1bb16d94135aeb8c557f2424635239d605a595. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEP2443457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe752a13fd7086e7d202b8b98e5352e08f93ac615a7985da6722fe71cca21edfc. 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/QZMEP2443459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4591b09c75c2c0149cbbdbdfe808f1638d19e87b4b2466010c6e1d5273238b7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZMEP2443460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a03c15c816dfc0dccc3191e1bfda8def9f646ab297359a02cb4491e3be49ddb. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZDA62535124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf154ae073c6fbfe9c8b15dfcfea3878f2b8049569f8712102a0006eacf017cb7. 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/QZDA62535125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e88b2ff5aae6bcbb8d7dedc15238b2488c43e0adf2b9079b8e9d63399ed74b4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:16Z), 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/QZDA62535126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1359649e470fa9bb8542e1ac12e474c8f117c538f4248fba1b96dad66b2ed42c. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZDA62535127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910961428a2d56689cfcb93b18cf95a4019f02c47e5c59fcadaf258e4c8fa0b9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA62535128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43257ae81879a1107991ef1208d894f758799a962330fd9e1681d8cdbcd1d2ae. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZDA62535130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2533ddd2e434b47d7314e3b6683ddbf802640fa7c543bbd2613aaab566a0c52e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:30Z), 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/QZDA62535132.