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 0xf23c76194d030f621c35af40b9787ac30ae6e34196cc194c7d474a80c744b4b4. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c14f4c2-44ae-4c72-85bc-f765e95443ef.json and https://artists.proofprofile.net/proofs/artist/1c14f4c2-44ae-4c72-85bc-f765e95443ef.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 0x4488632c89aa0fa3e85a1f2f6f1cc91f1e2cc560b5f801f64e33ffcfdb6bce41. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZS672446378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a857a5b9ce60b58a9073d4f9aa7baf65a9034a59a801141b4bde490ba2841a3. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/DEPI82415337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f12aae9643f74b24c262045362653b00c727b9e2b7a99c95d3d71408282e5. 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/DEPI82453355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe195fe16527c96fe5b3af7df9f16a8aaf473951fed3eade2da418933aa426ba0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42568335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7321366b23b4b73f3779938ff3f567745d57644c6f0b410b652d1ed5d1bfcf8d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P42568336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c36a62f2db35f7a8679fda0e8de00c5362358c4e0e0b4d4bbda4e38af74c3a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P42568337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf52317f1065a2f5e0ea07beec2c9cdff449e4dc70cb703e1e5021ae43536159. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QM6P42568338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c028881b33796c04bf64561bc09b8928cf0a567a778a95cd239b0f89efe5a8. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QM6P42568339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b10215e1129682f662e88971c9e2d5cccb60e2266fb29da7361b30e2591a3e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QM6P42568340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420806270e8887d147a2b77b03974774759244f3899b8e7b3cb449edefea339e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QM6P42568342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdd14c260f6b1909fb7065b35187f77d9c506e5f53dc7a9aeae64d6ef936423. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QM6P42568343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea70a232640a26be4f5ded9d0fcbd3444c0f60e18c415c7e0e57d21465d97218. 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/QM6P42568344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0b02f9ce28656d42e0759bea45922a385991a6d7b70d2e743cd5bd6b617f27. 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/QM6P42568345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df578fc87cc4f38dee006f9b52dfc9660da1d2764342dda887be06f124e4e82. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM6P42568346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7289c10e7d0fe4c9d55e0e4caddd1504d57c670dd364d0018f517c943675b98. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QM6P42568347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e3e140a7941d92953049107236f52e5837dfa12449884dbb7bfb850e8ce57. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6P42568348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9558a698e4bf6bc92ae3610716d80054517b8777c43809b95000956db91c227. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM6P42568349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd482e443bac8b3478df0eba765273803fbecec0c0be370c05ba1914d61b1df5b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QM6P42568350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b679e5432ec7f95ea403486bc1e13268f02ae4e8bf41006fa8fba5135a9a5e. 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/QMBZ92511044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f63fd59cb75b8f1afdf36befd3091dca01d55d483e743e24fe94f2e00e2529. 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/QMFMF2530653.