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 0xb38fc5849f2f496b0806d2a0f1498fafa78c76b87c42804009d52d3eff3137da. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74efcfff-76b3-45d1-827f-9c5eedb2fa6d.json and https://artists.proofprofile.net/proofs/artist/74efcfff-76b3-45d1-827f-9c5eedb2fa6d.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 0xa1b7a367ee4ca012519ff986b7402c5540501ff43334b5151e92378468e86ff5. 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/NLGM12216167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d6e6672f3c7eade52ac8c68cbead85bd4506be2f4fcc2c00dbf9a97a23e6df. 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/NLGM12216168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4152d7e52f7911edf0fd0a4ccf24d2fbe70348254123c4454c3b119d99651442. 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/NLGM12216169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034d62c85e082cbef85c074222c32f92f1d3556358755593e6c08c2b6380f463. 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/NLGM12216171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b512184da890a4a8443aa900ed669e96a741b47097d4c474d1b141d4b2db89a. 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/NLGM12216173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bd523c08b8b6ab60f700bf97dce696b2a295e1986d7c99e0bf7ad229ffe659. 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/NLGM12216174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ca210bd55c06eaee832154930b8221d8a9080c5d6a31b5ad9d0c37699a34a6. 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/NLGM12216176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3177d5023fc933831cef880a9b7fb9ee7c36897e34ee8806cf3e28670d57de20. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLGM12216170.
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 0x20dc732708c67607c7ba8e3a44a0c7f7ecc47899e684c94b9c6060ed961978a9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLGM12216172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7d2fffd50e1b77e2664c004eef85a72166a085297376381df241efe2df998b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLGM12216175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd810b3989b5719c5973630e825c2a6c0defe4482801cfee9afc7c3e57e538f99. 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/NLGM12216161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e8efc325421aaffe9c7bfc39e40d94ad78d909afa8ae2f77834a0396dddde1. 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/NLGM12216165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5474390adfae91ebdd9ed05c3d545bbc6ddb342c0e1dcedaaf9d52f3831991. 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/NLGM12216166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd810275b21317467f2d14bc9476fe997bdaf0967c8721558aa4aa6e27ceadc3b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLGM12216157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4a8a564d95dc91b943b3995d28f740a2b5483d00f8aa685d5ab0e236f491cf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLGM12216159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdd7fc9972a9934ec3c269e2e21477edbcc9744ce32d3f228f8880268999fdd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLGM12216160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2856a959c067d2f51ead9ab600b0c002e278ea1d37ecfe17ec0c40615ad1d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NLGM12216162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aafd0f5719169953739778e0b20ac9be76cc3b4caa12c38e99eb3c7c6bbcad. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLGM12216163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd2d17fec8cea5f0ada52a830b2a1be5819230e5244dae68883f5f379fbb81c. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/NLGM12216164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37a6d97fd1441ea36cf4658d1e05348573aa1076f86c3f17bf64f0d41a21d72. 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/NLGM12216135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa907e83116e824257373a9fdce46c2483d38435932ba4bc531e33ecba3b867. 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/NLGM12216137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc511de3a72e43d83f0b8be0973e579ada374cad776f785ed28838f952bb8830d. 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/NLGM12216141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa622a0bc19a0b2528163e71f4a2b52c2f193e74cfdf5a1f64e4e627680181ebd. 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/NLGM12216142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28b20c5061ac87e883fb1337d7331842f2193db267dc0c7e93d514dd0a38b30. 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/NLGM12216143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0f79b64cb873fff65b1c3aa8d93a012ddaa15bb9437a84164f832a0a397cb0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/NLGM12216136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe344751489b676e3640152b03fa52cfe403cd38b4e811ad2ff12ddf6d39e1db1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLGM12216138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4be2e8a7ae801a63cafb33134b6ef414481263eaf36b9cabb1f2bd0fa38627. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLGM12216139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e612fa90d4f794623ea83da69ac780ed4a922da4772ce3c375c4e819ca0681. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLGM12216140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bcf9589261ff063e204e7bcdd1082da4494409331e7396d6e27878a5580d65. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLGM12216144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef47fffa41af6daa5d095cb740f86cb2745dff64d3b30638e83658154904f7. 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/NLGM12216145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc535ea87e63a4bde5db9adb9cf22ff9e92de54cd2d1de27c5f44082434564f62. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLGM12216146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c20245e70852bf6a93165803835f5fe9defacad694be79580833beefbcbd8c. 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/NLGM12216187.