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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcef4d6e6e0c23ca4b229cb28a50d750a8100aff86c3d4c47e2d0a8557f9506b. 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/f51b7d53-97ad-4bcb-881f-d22042676490.json and https://artists.proofprofile.net/proofs/artist/f51b7d53-97ad-4bcb-881f-d22042676490.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5fb293ac9912ade12625aba082888d1f564df92792134910ba74d616dc6dea. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOCEM1686010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6850f8537bcaae951f2db5cabe0f07040de165391a272c7f42f1a527d37ccd9a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NOCEM1902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d8faf25a9f71f21ef77057563da2555ef1c16468fcb8befa0aac458be9a277. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NOCEM1919010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f2bb034b94e8fbb87d4d43c23537e29b77398f74d10438283981ce67aabf97. 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/NOCEM2017010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1750cca01b47f26c3d6c97b71847a3eaf52f0fcf897448890bba087a17997591. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:31Z), 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/NOCEM2128010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6605b72e9ec49154eb07aa68abde6dc262aa79075bed18215dc7ebbf5ae6e34a. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/NOCEM2475020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6efc86630182da595e3bac3e9637df50c3e5453871694d710cc15399f852d4. 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/NOCEM2419010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fa0c7cde432b7faa720b415bcf482001285ca681b526818f985dfd31d54ffb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOCEM2310010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2a4b19b10277eaa1ad9fefb68a7c92c36dfc3dc3f474310f85c35b8d1c5f7f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:48:55Z), 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/NOCEM2326010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc98a2b0aabcb050d6c970693a1be2d1882a2df70f6c20f01dd7bf169812b541. 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/NOCEM2423010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7fcaaa84404bfb7deeaad8fcda02cbaf50b1d65ecf1abaa98ca47e3851de0e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEVLW2311007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4591938b600e25be63a200d2e75166ec66dfc9b8aad4d76d32462b82ee51fbb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVLW2312010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce8306efbf9639b70e1582e77a4322b50e8bc281deaa643d7caae61270d62a2. 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/SEVLW2309004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05debdf74bb8275124a0567ed1a43b4732e564ceb8adaadd91abec35f9ebd36f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SEVLW2310003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fd35bcbf60f2d441a811145bd8401777bdd04d5a5a726a2c38624336121083. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEXNI2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fd35bcbf60f2d441a811145bd8401777bdd04d5a5a726a2c38624336121083. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEXNI2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fb21f60d26f20ea91223e187dabb38d043802609852f9bcaeb6e14d7f1d3e6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOCEM1797010.
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