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 0xba7c88d146067713e480dd8bca82a52276bfb32f39a1e24cffddf9423d2f191e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e20ca00-83ec-49be-87fc-440313a1fe3b.json and https://artists.proofprofile.net/proofs/artist/6e20ca00-83ec-49be-87fc-440313a1fe3b.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 0xa74b9150585604430fa78c256378cccffb647809b40f9ca176044e8c7ebf3363. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME1915737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba0efd9da3286bcdbd100e96e721c80f9cc780ad27a38317728f61e26b9719b. 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/QMFME1915738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e26b662dabdadf1ab52b1b079bb4a77f4baa37b50c08fa81a8d3581956cde16. 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/QMFME1915739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37cc2ef5fb714fa6b963b31e69943ae45fd003acfb54a1c4edc7a3570706893. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME1915740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe116a8640427d36e20882a3d99a72b508d1dd9de2b181332ed8495f9034d460. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFME1915743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84aaf07dc7add42643cd607149be94b089e79fdfc3494d82320c2f13eb75fb02. 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/QMFME1915745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38da664d4a8720c075939b5f177fb6f6a772d2c6b8dbe67413f3dc55735f70a. 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/QMFME1915747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc91ae8e3af393da1535913bd6ac1cfdf85fbd7784af7a9abf149ac65a2481b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME1915748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa076c46df306a80a97b9112231b71435c51c4d2d91ea6062ed67a4bc966fa3c4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME1915751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9cfd8da26d46cc6ba912a2d2ad96cb7a44f87c0e5fe20738d1e871aaa3879e. 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/QMDA72130640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebd6707df6ba71788657ca1fa23c13fea6707726bf1ae5af38a55d524dc2d7d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QMFME1915741.
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 0x2cc20e4353a1eea63fb28c75781e610029b3b75b9d06b643aa58584bf79d80e5. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QMFME1915742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dc8e8046b538e1591fb80a245dd594e3fb3bca5c3c9af4a4b2056168d63133. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:56:59Z), 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/QMFME1915746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58398e477f5f850f305f0c5de1bf6bc59f0f3287fd20de67ae547e4d27599b21. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/QMFME1915749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6fc91417266840eb31e2658c49dbe038c4048bdf473b0558833cac83416fea. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMFME1915752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b89e8f256330f36d9f7b25a3f32a605a293fd82e317c49520ad9fc10e323eb7. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMFME1915744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbd6a9b5f065ab8a55b662183e142ba894a269328f4e2bb23c112d7ea8fff5b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMFME1915750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3271e99fc49b9c1a6c2caee8cbe7ecd03be0a1a0c201f4bb9283645a6616f590. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMDA72130643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1414901a01f9d6d1aa51fc57915997f0207ca680081de018af974b0805281651. 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/QMDA72130630.