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 0x9fb513ed6e25d356b0e67212d633ba5ec389bd4697bb39bdf1d24e81a56701c7. 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/693ce218-8e4f-4f5b-93b9-45511a308de6.json and https://artists.proofprofile.net/proofs/artist/693ce218-8e4f-4f5b-93b9-45511a308de6.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 0x05bfb3fc6f876372b76e238f2e1625711649d4a082a4e6eb8b355c76adaa2093. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/EEHU32001205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7e26351f0c561d2ae11c2d93f85e1165cb8fc69e943de4c4cbea988f4059b6. 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/EEHU32001208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87d5f3fc448f523e248dbbde3fba5ecdb2696f9b000943c2868bfc946667919. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZGWW2004072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a7a300d312fcf6c9eb788c66825e4878d672aedd3d25d4d9aeb8f128b029cc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZGWW2004073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5168b0fa23996a18709553b58d4bb533c09206ae787caeac6bb36d9957262f4f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/IELOI2094250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8766a19da673d57f347dc56f090e935ce75f366e68927af653f203cee1736e. 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/QZB4J1807912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237b97a517d276fe1d64c38136ea043fc0f6896bf8fbe2e2b21daea907beabe0. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZB4J1807909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13491ff0e2817fbde02adbcd61f2a3cc1b113b0577da0d7575769940888d9dcc. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZB4J1807911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92add49aab52a5b2c7124745bb9c8eb6afbead2e75c8552471ac1a093d45beee. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/IELOI2094247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae306dc847a972d7629d2b60c225092d15a3a81c81652397fa4f36b1e68e4ce. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZB4J1807910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b696298c93cab94f8af22ae6c6c5acf5d8797c0b16d8052aa48616b3a65688a. 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/EEHU32001182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84166b4b6e27038cf1ef25b7e50993d32a0f8e0b97f97bb43e61f632b8792b5. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/EEHU32400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371251052a49fdab5a690cc345fa31f93ddf76d6e0e86ede8ddec87f3fd02d77. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/EEHU32400426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6dc835f87e6eaf4eb3a4ba2c2273cc50477136a512398e0cfb9b26f87f8247. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/EEHU32400428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a1c52e4d837e00708f1675fb4ec1fbfadbb7b94d0497fe6708ba2eaa87e99. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/EEHU32400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f2f76d51c6824148413b4a071b8f58e5a34a7efa498fc7eff9a60ee91911ac. 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/TRCLC2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0851fcc0e529fe28e740bd5ac8e21eed6f673164c0d3c0b12f88e487c8d6bff. 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/TRCLC2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5243de4d0f5ed1d35db0ec4aa6644fe041902ab9f1b13ccc9a55235facb26f. 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/QM2PV1633196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10c19d85379beced28e85e9fc11eb92aabc9221eecd1954e1ff4a4d10dce716. 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/TR0061800411.