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 0x6e14a0c7cc13676c1f559ba8aba9575f51969792ff53de450356d770c5f0bec1. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5e72589-c65d-42db-b4bd-1f63813ea112.json and https://artists.proofprofile.net/proofs/artist/c5e72589-c65d-42db-b4bd-1f63813ea112.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 0xc45256775f5dd5130fbcd2436d0ae53775083ba22a45e9d4e3dde447da89bf8a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:03:09Z), 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/PLL371400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e9b8d6b0f87678002e2efd62deeca9472dca2eb49213da5ed69422c0f22900. 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/PLC062406031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950272b161c2623df76a5cf25599b3528585f686c0d7b3e932daab9487d940a8. 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/PLC062406035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3752ab916d915d448a17ceff4531a44ad095db5327a735af090aec2bd1835d5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/PLC062406032.
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 0xa97652f42ee56f0d10c357dcff99fa375b098e03aecfc37d3c715b4fa9eff337. 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/PLC062406033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384fbb0a45ed63aacb06a85af60343580b89e15559c11eb9cc38b35d9da96d4e. 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/PLC062406037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9001fa1e4304724d7210562743bbd2d68c6f66d81458e4634a078c8176fce29e. 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/PLC062406041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379b835c199c7433368223b34cee92f2d45360ffe5d082192bab2fae9efa0fc7. 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/PLC062402847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5ae6aaf494e59b38630d7cff524c9962409d06d91377298fc969aabef53b35. 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/PLC062402849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79a97600318a3d1fdc880f144ee56fba874a4abf7c9e7565be16425efff9e9c. 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/PLC062402853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d0e602b575224a72848ee50251e839636d122c25c13de0af2d83266e33d609. 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/PLC062402856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8046cc02bbebd09f8420dabf5d71589ec0949c2d66b012a96b3b991912e5e5e. 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/PLC062402857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c8a778ec254c6428e232d2a11d509dbb00f983adb869d80c57c0b21c471d2. 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/PLC062402858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91045af262275e02c9a9d1b5c3ce89d5bc86352c66d75f29cba5de022491990e. 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/PLC062402860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cf8e1a1ea248848f071a468192ef5254e02cc7375f72c0d0465dbff798ac54. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLC062402848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e754213577ee111fd13d974ca469ef3efb3eee198c0da18a424a0a476a66a6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PLC062402850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad08f6ec0108ac0a37f2ffe6e11959f8b6255d765ffc4821ddc1fe7a41121da. 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/PLC062402851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fea6eb87527d441eb26144b990b27e79ee8fc012307fd424a06fc2dfeaca7d. 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/PLC062402852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f73297348bc4807bbdb32fc3aa6a41db205b352ba0f1c9b6a745e93aa892114. 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/PLC062402854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6851af67cfce34e5371d54bd2dd3f505ddc977747320932312931d693d7ac61. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PLC062402855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663497ce41aa6bda1529e4ea6759e695aedd32cda3d5321e2dbd9211001ec003. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PLC062402861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356e5398c3fbb14aefa5157dabb9f8627c81ecaf0ea564cdb6f9f673f7ff5c33. 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/PLL371400199.