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 0x44a52fa9b32b73c2c05914467b85a4a37a1a53324c7ab0bfa39cf68524106626. 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/ae022fab-0964-4d97-8cc9-8abea1bcc8da.json and https://artists.proofprofile.net/proofs/artist/ae022fab-0964-4d97-8cc9-8abea1bcc8da.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 0x91c57c86dfcdcf83ce8c0e26c954efa2fdb8fdf689e41150ebe77baad2044f7b. 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/SE5Q51700892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da72f56c081d4869220c5717fbc007d342323264e05d1512c542d359e4c65a3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE5Q51901345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d2b7deebeca76275b0e30ea5091856215251dba30cf9d396446d7712eded12. 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/SE5Q51901351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f12bfc51aef563d1fd5563b5a5ed66d88b690dd2e2f37346fffe2a10ae3ec47. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/SE5Q51901346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c51cf23fdd0902f6323f1ca37a98dc8e1b1b89a7f76fc95e296d1bbb4991b43. 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/SE5Q51901594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367d2a47dcb9884361b8189a7a5f844c3d51e6aa35be6d197bc5d26b4177220a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5Q51903761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c403235cf939c37e8d6d5b93ce989499e78129affa7bca6ad65f14fa221209. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/SE5Q52001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a75b15df7fbf406413443c85836fab9984decfe32510fd672a152634f017aa. 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/SE5Q51903775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2771810d869ed7ea6dd8f5dcc4e13a867ae9acc77fd910e2befee01ba92e061f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/SE5Q52003250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ea950fcd444b541c614a64d24db50cd20a069894c63cc4cc946ba7e468e797. 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/SE5Q52000932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c51cf23fdd0902f6323f1ca37a98dc8e1b1b89a7f76fc95e296d1bbb4991b43. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/SE5Q51901594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb72f6c7a6e7ed1dd2ae2e6c0be3e19f4b610d414fea6be907858aa5216080a9. 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/SE5Q52003408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa958a69912caa59c3cf0090d177a1b7208284a512ac1daebbeecae2369707584. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE5Q52000925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56040d9460bc6f8288bb4ae7c8f0975b50bc8bb262a1ce7d737b266636395825. 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/SE5Q51903807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da52adc13a9761e8ef01479c720c973d66c66d5822e2f9e9ef60c938435bdab. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE5Q52103201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638e83e84ace30c2573ce061419aada20a1a258ae430b46aa6bc7202fb7b5c4d. 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/SE5Q52103187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096dcca0892f3c9e334eb025bd4dcc1b18278c0d4c769aa13642b7df1088568b. 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/SE5Q52103995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025f91ab402bc8c07c00b035da48a3da0b4c8a27256f21fce6cc405bd2c6f66. 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/SE5Q52200544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6080cfe12cfef9b8f7848e68ad2d69358f229af0a44c04a10d2b52bc6b41209e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/SE5Q52200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbc91a52f23dcbbd4c56f1893bc116569548de487726e9ac34ecefc96023982. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/SE5Q52202259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd382e8e797d985526617c0f097eeb0c0446ba60e3bc483c326fa26a0d8a6590. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/SE5Q52302190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523f63f0eddf73cd2b302b25c58b3b0f19816361a55cf92d469b6fa71a683d9c. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/SE5Q52302189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3808791f91a0350bd5e3422203e0349bb4cdfe87ce7924522a427a283aac0f58. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5Q51700891.