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 0x2be067a9054e33ae5084a3d38c0309f6076b10856ce7c655aba337834ee3cc71. 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/aca0549d-6ebf-4a2c-8e72-3d2a745d7570.json and https://artists.proofprofile.net/proofs/artist/aca0549d-6ebf-4a2c-8e72-3d2a745d7570.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 0xd00f93f6cae61cc507d1319e76b19c687c5220339b1764ca6ed1597c9de34edb. 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/GX53U2082816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21118de53ec914a874d83ff6ab034a1d30c4a7cb9c1f94e70e97f889a28cf174. 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/UKXN22200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6083db5edbf59b3d8d4d3fef0f3d61aa56c3f50e0660969d5816a3aadf084d. 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/GBLFP2371683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57449451ab0d5300eb15963e5e071fb1398477ece8bcea5e3f49c6abd4c6e13a. 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/TCAEH1994414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182d94027512edf1660473ca8feb1c4d2618e2179def0d7349f248d347360a80. 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/GBLFP1966990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5594c4e4e8899759a98374ed421ae5232f684f41564837c90baa44c2d591665. 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/GX53U2045994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84638feb7d887fd24ffdb3975da0f6aa09987947ea9eabfcd10959e69ff8b100. 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/GX3Q92175402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d510a9c5ed456c695c68b5a7ad3f892bce103a36050a7f0d58d34cf3212098. 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/GBK3W1800921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7983f728c835c773127b749f947eeb4c6a84205eef8ffe0dd3b236131eaec4. 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/GX3Q92463372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491a7e8a8632aceb7f0611727aadf6cc34ed3e8f61355371bbf653e898a7bb1. 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/GBLFP2471286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf09dae886cc57f7f01c9a7208c8bfe1826f45378269a353bb8bd99e0aa7cda. 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/QZHN92318238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21118de53ec914a874d83ff6ab034a1d30c4a7cb9c1f94e70e97f889a28cf174. 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/UKXN22200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00f93f6cae61cc507d1319e76b19c687c5220339b1764ca6ed1597c9de34edb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX53U2082816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5594c4e4e8899759a98374ed421ae5232f684f41564837c90baa44c2d591665. 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/GX53U2045994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84638feb7d887fd24ffdb3975da0f6aa09987947ea9eabfcd10959e69ff8b100. 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/GX3Q92175402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3b814f37b4365508dce27a02e6dde2c2c8017e460559e870843b607ce79236. 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/GX3Q92038795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba16944000cae2a0e84c93f8450cb2853c47ca61385d098c4c43c8244cbe5fc. 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/UKXN21963141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb483f29f5ce1f6b524c22f0a68bcbcb699661c534d5f9c7f2c06e0c2e436cbf7. 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/UKXN22091713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f2d30e163cc20b2d09082c59e8aa573c3ac60e7c37d8c199331f77954f3a84. 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/UKXN22091718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb0c1e7a34cd2e7a927ad95f8d399aff1321ecd8918d13163d0bf8e4ac9ae51. 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/GB2GX2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57449451ab0d5300eb15963e5e071fb1398477ece8bcea5e3f49c6abd4c6e13a. 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/TCAEH1994414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65588c464715389b80b7b9bf290cd980aeecba7a62aee0c8f5bd8cc6376172e4. 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/GBK3W1800830.