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 0x1eb54677b8d0df9c8caba4854561ae36a33ad76603cc45d4060ac7d61550c9f3. 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/1976abc4-59ff-499f-a71d-910deb75e01c.json and https://artists.proofprofile.net/proofs/artist/1976abc4-59ff-499f-a71d-910deb75e01c.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 0x46d5030fb8cbdab997795e9c09ed6c12b049b81014ba0032b747ed334281d9ee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2144996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb15f6b7172011a58833a97efaf5ed7313e9a078f7008bfeaa4d8c847769bf4a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2144997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa453df33562580fd62ee151a3d7953098c567f973aad34bd81adfb2742669e2d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2144998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8410104380e47a9e64b68d5ce127cd47455df47e64c4fb238b117e3d242c63f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2144999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc02193c43a766896f42eb0f920a1f2d07f5509ef2a0ff897c5d2f12d87b7782. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2145000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701aafdf5f0a38c8c3ff6ffe2c1da2b2881f2ef70cfd28265c6fbbbf5355f392. 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/QM4TW2145001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a5e9841dd2118cd1ceda21d41f1294ae2b95abe9c057b981d7604b7e1cbee5. 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/QM4TW2145002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc904683edd9d7958b51e8057c4992eea5641fd4f50f0fc2623c877c78469456. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2145003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b739eb83143cc927e3b9b32c0a913e7b6a7da9ef111a682807f5115d2d4e8e0. 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/QM4TW2145004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab133524291522e9b1782217da2e513a2c425056419ede345e180abbc8dbaa. 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/QM4TW2145005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7221270dbc7b0b83b4bc30b875985dacdbd9cb014739a8244cf6165fe276da4d. 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/USA2P1563719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa148adbbf41af15a8a720bde257df8d767695dced4aaff2e624d5daba609dc1. 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/USA2P1563720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7cf8ae535d549532120816a24a90fd9aa2834e5a2fea94332e208a55804885. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P1563721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb369cae4a8cb19ee80a02adfd8eaee2d0a287cc7a904c6f1ced616b06d377c13. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P1563722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a0451d969456743607aafe83ee0e0ef9fad3c30bd6e33a4cd3507ba47b301a. 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/USA2P1563723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1c0018f1e675289afa0e2f155ac043fdcf6c69adcf09339907a9d3d60924ce. 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/USA2P1563724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b8a5bd9b7a4e58ad81430df7ee3bf93cfae4c3ca314691785f72197e5a0dcf. 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/USA2P1563725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c5272d8afd326333db2b1a08445d7e0de409f79bef860ba75181c0fdffc7b7. 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/USA2P1563726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f1cb6c481807c5192550cd6f2cf583c3c7deb9dbcfd638c1e96e8fac4c07bc. 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/USA2P1563727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb15f6b7172011a58833a97efaf5ed7313e9a078f7008bfeaa4d8c847769bf4a. 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/QM4TW2144997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdb853d5801ae8377a7387b27851054e09b5c250542698fb00c86e518eb293f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92272646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e995706779a2a408d5587b130fdbabf9354a386f0a295a9b83cfc45f18cb18d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92272647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b287bc6ee157f177ef844206f8ba49658479359f19662838ab0d12067cbceb0. 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/QMBZ92272648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a1771394ab9b4a30936c56c59cc0726e1472295a231441bf519c4d92f8f070. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92272649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651e07ce0bc289e7029e36613af0ae5a3b630825117f86fed37647aa154b8272. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USQY51450423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2af416ac9e61552c863bdb09e5d21eabfb84b1b3933fb2f4f83c20f9d8d7c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USQY51450424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebfb2210926fe6039865a821ae18c18082e2e3d7595492262c974cf03142cdc. 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/USQY51450425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aaf4055b92358cb2fccbeb1316a820ecd4a3c0785cdf779d6bfb27324ac27b. 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/USQY51450426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7d5500b0853a98e71034e96c720faa8e48a9801d580e104f5c2dba6079f71a. 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/USQY51450427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853766b6a855d0be1b2cd9fb274f48741dac43d8794ee26fea4249a6ad179108. 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/QZQAY2395091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64854b41aefd190aa4c27a3838097cdce95852f63f9dcafba9da4f63eaff2a41. 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/QZQAY2316166.