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 0x3ce21b49d6c54358a4ad7cf98891b05bb29c0d963ff4ce49f221c0b4fa1ba6d9. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e747506-cbc5-42d6-aeef-5d1ceec98a09.json and https://artists.proofprofile.net/proofs/artist/9e747506-cbc5-42d6-aeef-5d1ceec98a09.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 0x5007d8653f63ad841affe620d9ea91cb22b52fec6bbf6ba7087a1ce10efe1e3f. 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/AUMEV2268930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4476d0d52911df37085c7e4d39308932a514f674a75c055f694d558a63110f3. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/AUMEV2268934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa862ffe356ddf8d938dd94247d1f997fec7356e7e30093c823b5c9ed167600. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUMEV2268939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1846983074b0482a54edac4aeca4280e2567ed8aab2cc65b7919a609e131c08. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/AUGBT2322490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe28690bacdda28b0e9c853d0eb3491894c3e1f4d79e5119b36d5423fe3445e0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/AUGBT2342143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673ddeff459dbcda8a35ffae735f92657b3fcb8d7c058d7072940c07050deed1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/AUMEV2407958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3910af34952e3eb08e3d2f42e1b5578ac83943db9435619aad622c92fdf7645f. 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/AUMEV2525864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1efcf1e320e9d357682cf4ba52034425f5653ecb6fa6d2f42dcb1e5d0a19f69. 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/AUMEV2550968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3910af34952e3eb08e3d2f42e1b5578ac83943db9435619aad622c92fdf7645f. 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/AUMEV2525864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849e5fb0a84447c79506b272aa02e5a0d716c3de20bca1828c1018540dac1f67. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AUMEV2587293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3910af34952e3eb08e3d2f42e1b5578ac83943db9435619aad622c92fdf7645f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUMEV2525864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1efcf1e320e9d357682cf4ba52034425f5653ecb6fa6d2f42dcb1e5d0a19f69. 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/AUMEV2550968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc929ec09be079e9bdf82be90f9caa3cee2c4449222ba556e27ff26528910f350. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/AUGBT2508227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd2bc1d9ac9032625b767a402c2f3d60d7c588f475062cf05c4de5276d253d6. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/AUMEV2569461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849e5fb0a84447c79506b272aa02e5a0d716c3de20bca1828c1018540dac1f67. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/AUMEV2587293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55fc5898a759664d2f7e24fdc313238d8b3b78a2ab930efbc8f7d6e4bcb0730. 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/AUGBT2508235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad1cbb28506584ef781642e5ec3622937b7d3cc29508477f46d50c137e2e6da. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUGBT2508240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1348a6262c83c9096d857fca15efeb99cf55258c03835446eef8bcf60ca7ae38. 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/AUGBT2508242.