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 0x481d1fe8cf72a00037e965614442de28a3af0083d551330814ae034b4704eff8. 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/b5fd676e-f367-431d-a13a-3f18dc13e376.json and https://artists.proofprofile.net/proofs/artist/b5fd676e-f367-431d-a13a-3f18dc13e376.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 0x9ea57b1955b24409459fce3caa93b3e4f2968eef702d5e5e122b8a93255b096d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CNA500501073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c111c50a1f4d89d5aa8da8cff761f75bd2b57e4d947742e5f54a807dedabe7. 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/TWB670702101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aded7bf6ef1a59b17bc8d8fd741eeb372ef2abd22d8688c7663ce3e79551edd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWB670702102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32abd9ce0711042e69a0757c0609b5f99f2c2bd426289630d3bf9da3b6301cd6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TWB670702103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dbd68f530441c0d1a7bfe07bbea441f3daad1d63f9675345fafa46f8889429. 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/TWB670702104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d13dc42174c56cf6894bf2a534dc6ed29bc4ef8d18fe57d5ab782b6dbb7927. 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/TWB670702105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb2f3cb6cc2296329d415178aae6e093f2f209197ec269014ce4fa024d84184. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TWB670702106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fafec42557c3dd8d5f923c87bcad3991a108fa2299c832bd5bb9b2e52239373. 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/TWB670702107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f254a711d44d6917c78c2be0701e63cabe28480562de53d0ea67b371dc89a9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TWB670702108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9207a6d9c21b95c9d4efc1b7b9944f23ce5ef4f841154ba9b992fef66b0aae. 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/MYHL10611102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c64b47efc6e0cb127b38fe1c59d3673a3b9852c211039d55a569b42658f9a94. 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/MYHL10611101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabaaaccc5ebf3aa3582291f9dde47af55bc549ac78a83dc397765690cabc423. 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/SGA150702201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ed3bfbc3ffe3c685a441c8a5844d5aa0de940e8aa591638c123f5c673d3d03. 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/CNA650746203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4543caf6c58b637ccbd5188a8a099dbaa91656de43e41c0affc5d21b88083a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CNA650746205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e16e49a268d50abdf6d7588eb3be415f69432f6909b0857a0fc008d073ef4a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CNA650746207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7872de77471607ca5750541d8c00bc5ea65ed3bcd3e057373d42d516e0ed9e. 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/CNA650746209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf856f8e5699f39b6ecfff18ce45eb2af1a06c7dee696db8bcf635972d66d6813. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/CNA260836302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809c99d567c275fb2debf82e64f10bfaf8148d95e79c0689844f4d7d31435d22. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/CNA260836303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d752a5b3b67283a97cabc1bb1aff581310576e4179063d92b3b4951c236d70d. 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/CNA260836304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bcaba533d9e11fbde260e568806a90547fa1c80b2c0a1b49442f497215410f. 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/CNA260836312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68068b1fcf643a61cde47b96c79fb3eadfad090880f546fb9e1a262bf0436ba. 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/MYHL11002101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6804481556252735e171a2c4e577121c840145879ad38aa9de5711dbc63044f. 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/MYHL11002102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bec01266f15ded18061010b040e1be21e8fae6c839917ba9159cad4583e4b9a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/MYHL10904102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d2708f9fffbb6572c42cdd6ef7002c461ef35d20af05e28c5fb96816b15687. Chain 2 (Bitcoin): anchored in block 957561 (2026-07-11T11:41:29Z), 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/MYHL10904101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb87a47db43d12fb84ae6d90db837c64ea4c7549d0e179674fd7d6eb42021b8. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/MYHL11002105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03ba0cbb63c67e20c77fa5f4cf2536a39b59418e24ed111ea8721b42ba5f201. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/MYUM82400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2020251b8fd5a0a7844e5916d30e0aefe97fa1127b38089e1b3054c09bfcc8b9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TWU712513864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d79f1aa2e6e9f7c5c7565e94d06e906c34e4578465293f4b3e4d4fccdbec9b2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKU571106485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65e92e17f29efeac19a8d81c1505cc093732395aac8f6c6e30af0b176f9123a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWB670506109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f2eb6d5ab884dddb31601d0915261776f4237249d21c82a988fc86f6bf57da. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/MYSB31910001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6804481556252735e171a2c4e577121c840145879ad38aa9de5711dbc63044f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/MYHL11002102.