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 0x3b315a6698b7bd141503654129acea5f888fb396639b90b073c9b82ded576164. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6f2cd5b-7277-41dc-882d-d5ed23695a67.json and https://artists.proofprofile.net/proofs/artist/b6f2cd5b-7277-41dc-882d-d5ed23695a67.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 0x9eb54bd5b4feef15642ff48a0c359ee3c120d9a575de281350e6d7bb89b32a93. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN42538847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80c95337b43861c2fd098ea626e1c402b81e78d061a095e64b8ebf77d6424b. 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/QZHN42538848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d94791ea473f50fda63da2076d0a5b118456a24f59c19a88c546b3c2db2d8a9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:45Z), 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/QZHN42538849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8fe8e29abd286525ad3f4149b57fdfb0c89ecdef3c09036e3447a172f480db. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHN42538850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1894d865cf1037ddb8f963450a188564e4a2c3e5c31b79671897b270c1ae9beb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:33:58Z), 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/QZHN42538851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ba5226c7f7b575ce2f2164ef117183b56175d76d01b32c81c56429f7fca160. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN42538854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835841ae5af9e841f06665a5150815b0d0e6a3241501e11a0232db1dcd88e7f. 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/QZHN72512032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e32421703640d6e8a86b7ed5fa1673b46f70056eb7d8c9a057580d7aa8af58. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN72509645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a1a64bfbb7032db2259d674cac580303a8d7e43d0b74aa2eb7a49210f42d0e. 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/QZHN72531121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fac7ab28488820868ab70297da53c99aff43a7f734c459dfe93a5138ac20ee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNA2508054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666a3d419479d09fb92eebbfeeebd1a519fec0ec760ea2cfc138dc7debeccea. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHNA2508051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa36915e44ae57f49d2f62313b0bf57c89cb70387ade0e6e02aff64fc488451. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZHNA2502289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9efe5c090fafc659827ef6771ba409d427dd8af9dc13413b42d4b34abcf90e2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHNA2508053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63df273fb40eec1ef1125fec262d29ea60d8c5c9d1334f2d256edcf4e5f9940b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:07:43Z), 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/QZHNA2504983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7676cc4dc99ee17cd2bb4e3ef15d77458bcefea95bdb2bf50230b5274fe9d5e7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWV2582629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544ca99899a5b6191de628aba9814008d0991e2f5bf7a064dbbecdff00729121. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZNWX2515709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8270041a8750142830ebf34ef41a46011d81e9e75e2713f0da36cafcc3a8d7e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2515708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa113c33e56270e0bc36dee9d7e72e9f79fa32540c10d83538fb0165454521e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFE2585557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4de7e9e9c52e718168d5eec3dc400d066f1dded31bee19aa5d0afda511be0eb. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:41:34Z), 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/QZWFE2585562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ffef75759b78e6b04af46cbce514b4da717fe06907a9bb936151905b27a411. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFE2585558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fa77ab4824494dc6596272da0d0eead043557b5764aa3ae3a5d2db9a6495e9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFE2583256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2ab6c1e0fb067c9b64334ed298b405eabe7a31312a8406dcbfda37b7603b19. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFM2539541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed8de90581afa333ef5c32fd980a3bf766b3b788d86fbfebf6c782ac2d6b0b9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFU2507049.