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 0x364197754189f7f872956fe9c863108eb1bd0d1b5927c35d63c94843055e9e13. 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/d1d5ccfc-52bf-440a-9272-2b2253a4746a.json and https://artists.proofprofile.net/proofs/artist/d1d5ccfc-52bf-440a-9272-2b2253a4746a.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 0x2d027e02e5f148c2aa014edda239e3d7b9a6b8f91282dfddf81c56fcd680d7e0. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/NL6DL2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4a3106ffa8d933cc376c46314a815f0a44238060370ac0546c6cec3290fd69. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/NL6DL2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887613d6d162f0557f6d1bc32e456315963c38ba80c6b4afb4f2dc1d2642b5fe. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NL6DL2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf290623b029e04219f28de81bbb0c067000940a5b01c48479bc3f8d894fbe530. 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/NL6DL2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eae2e4d23c29c6041ee2075517692ac029408381c2fb2736fdbc93ed9aa8c0f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/NL6DL2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887bbf4c90ee52be36c87a11f40ab2706e4f27976e5aa16c3bf2a1f2c1ead55b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NL6DL2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff5740feb1ed8719600c97e277b91d777c3e00ae9d7684d9cd787eb50ed882e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/NL6DL2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9966f52aff20146b9014bda38a8aea3370a0d4447357fbe35e0d33375d70b339. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/NL6DL2200008.
In Een Wereld Vol van Vrees en Verwarring
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff434f62258a86b515b43325ce11071dba12955267b732aec2496bd04d40b84c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL6DL2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee1ff3c28f0942596f70e0df89398ed5720784897b6f1071ccd18e113201c68. 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/NL6DL2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3211efb74e87378dc97d053bf9690be6d265453db314f82b38f6934663fbe354. 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/NL6DL2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fabdad653a4a11bf9ef22b3e59314207b531b0087dd44ef6dba62c048023aa. 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/NL6DL2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce5306a36fcf92d9d05d3a3dd1107db5d29646ba3c298adfee6c1b41d5047df. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NL6DL2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec206fff054419e0ad718379b2e40f1808298390ea91aa66d93cd8492bd0f0. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/NL6DL2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4866e6ffc344fda91e7e7b3c2e659a7f1747d59703e30ba6a65b704364053acf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL6DL2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf809d2aef2dca47259da519d907ecce17c545f50ad4916da14b0e17cde193e35. 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/NL6DL2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669d3543f10b6c283b304d8cac5b4c5535b592b62a8fee66a6492e01df3eeb68. 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/NL6DL2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd8e50c4529082cb1abbe9c98988d47be1598878ff5902b280862843597fc3d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/NL6DL2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907556fed65ccc51686ce400b41bce8050676fab57d8b64b93175d1f5f17fa8f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/NL6DL2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0b60cc18b4740ca71063fa569a1827f5cc465777e5e4c945497d77e4aa25c9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NL6DL2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee7db4532edf715cd519302c02dcff68e54614a96f117e57e46f09ef6093790. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL6DL2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639a0b7a09be0ebff17dd36a441cd7fc3da95ae5056a2fc36ff67b94723fd5b9. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/NL6DL2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8528d80049cc81fe3e03bf19be2b260ee0c48c1859777b61eff52a797fadd78b. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/NL6DL2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1139e62fd68236fcf3b933b360a0300fcdeaecd0700dd1d2567d79f1ddc3ef7b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NL6DL2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1a0bc8d60ac81bfc632f61c38b0e2fb9a3a1917853047c4d1bc49f8ee92cd1. 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/NL6DL2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa9729096514bfefc88072427170a4610e9b014ae238d2bd7467a0735f13a5. 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/NL6DL2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff43282b21c4736e349d101c67be3f34f354547f357bdd53e0cf45d3eb651e36. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/NL6DL2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbd8ea1320e2c38a8f05cc078dac41991a75ace4385e69c25751e4c882301f5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NL6DL2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d82548a6210a78b3217d12883bc8808efbf947a3dfffbbe1f7fd634de9ac94. 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/NL6DL2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd993152cea2d3234b28756e6cefabc9721e77d40833e3356b84d94ebc9218d11. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL6DL2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2766967b377b4ecf9a2c85efd253acaa1e8a037f775854b438f26af2ed71aa40. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/NL6DL2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa139eb711df9f6c9fbe6246eea38373e979a8b562b121cc1258675a4f8d109. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NL6DL2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b12249c16ce4e5f982cdb81117bf4b91a77edfbc97b0b8d4b33263bf887891. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NL6DL2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d0b63a9ebb065ee2fda8b981960e1c8aa40bed6cf32479e5796f455db24baf. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/NL6DL2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af54a1ba162ab7ead11a0fce457b9a455286d81cdc42867d649be69c025e4a2. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/NL6DL2200044.