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 0x899b2aecf749fcddef0178351f6913e3b3023e014f3e8a3c91ba3a01b8ad5c67. 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/b73efa19-3b98-4b6d-8cc0-1b266aada55b.json and https://artists.proofprofile.net/proofs/artist/b73efa19-3b98-4b6d-8cc0-1b266aada55b.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 0x2158c5d5166fad825c7b3a6cbab520851f63a1ddf1c6128f16afa460dbc41a36. 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/QM3DF2411337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9920b228ce720812eafb71def50c2a9e1ee83d4daf737e1904470890c0634a76. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3DF2454785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ab388ec51cf77d4307c0dc934deaebf5676f664a488a73a5c08dfcc913904c. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/UKZGC2404464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f2a927a1fa8c5e96839b6fc9fe9a261e3edcdb90dc18f47c113bc81d115d6. 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/UKZGC2404465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ae71963d4e2d264121ea168f4ecfa2e799c27e0509477400db07bd1b5727d4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/UKZGC2404579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb6c147b0c8fd54d36c67e6ee2e633ba16b0c772e6733f07e8f0bc2b22b8e87. 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/UKZGC2404467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070cb3e8eef47ddee2b6be2870dd8a558791f31da2eb402817e3f96bf18d9c7f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/UKZGC2404588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc148332468557a80d4786aa1e3a2213dc35dc64b82650cf7fdbf97cc90f11d78. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZGC2404589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12efd6791246a3a31bf8b8fc366b37ba65fd8ae69fe58aad4c36eae35ace23c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:10Z), 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/UKZGC2404602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294019a7ecddd7644a1172fcd42db0c6d7f5efcfe15e662f637c6b3d2412a6f6. 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/UKZGC2404466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4ff0c78b8b8dad937c4be3f042bdeb35992c32b873a24b9a3b559401247c3. 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/USANG2422096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63738302f2ed98cc76c502982a387d47e533d7c47f3f6a5bf89be2594a43e80. 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/UKZGC2408743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db40f8a25610b8035676eb5d540203fd6c466c5823e7df358faea36d8c805c3. 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/USANG2498936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e77e165a6fd0fe40ae5d04f34eeffc079bb2470bc740b97c0441a06f15a0d0. 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/QMANG2224990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096dc5a282c9fddac8e563291585592454b7f4e6d103fb2f89616e053170f5de. 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/US3DF2427014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63738302f2ed98cc76c502982a387d47e533d7c47f3f6a5bf89be2594a43e80. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2408743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa45ac3b2e0aaf8b20b47b43f49a3d5f56f11534412e1c48039f27ad3afd3f. 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/USANG2451324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabf896fd0b2148e90efa2a3e126a3da6f2c2feb0cebb304383c1692a3b0115b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US3DF2490954.
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 0x938114fc5d789da0621663b07761029781a618707eefe9fb4833c7c5155198c1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US3DF2463306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9416dadc645c76713890838ee65cda5253c7ca129d13db37fc1f1607f366033f. 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/UKZGC2402082.