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 0x462ee1a1be81fcf7068951fc7f621aae72a024cb2436105a5ce75e40a0149f1d. 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/71881933-3420-4435-a724-1de92069d186.json and https://artists.proofprofile.net/proofs/artist/71881933-3420-4435-a724-1de92069d186.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 0x49521b6a1c4399c89301d17f65a42ba1ea73eda13e0e4551c87a79adc499f741. 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/GX8LD2454100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7937337dc4e38d3267f1c29a885a036674b7d4dc00e2fd9cb635a6d54b7dceb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNMU2344734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5230a9286fe1a65dccf1a56f2a2d1691c1f72f1f55cce553d35fbb6959dc1604. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZNMU2344737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22de385021875d964bf3d74c02d14993568cb8f4f145f97e44d057813a50ac48. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZNMU2344738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cda4f3b5ea87f523a90eb63419704b8eb29c0d0d35c26cece73cc55689796ba. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZNMU2344739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb6318f5cf2b03dd0c5b0a320b36c000e42f550cfe7bf62cc40b86f68db2c1c. 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/QZNMU2344740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af70666be464396dbe1418a4fb82cd36b5250b9e66792e6eed53808deaa2cc8. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNMU2354150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01337c5175c3cf5e0c3688322db5dc0993476a0bf958f38392e164bc78181694. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNMU2354152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a85fd2868cdc4491d53c3153a911ac567d961f079d16b9a41599d4da1027292. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZNB82406042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c9000e71561d359983dc98a720f8d63c8c74bb99c054676622876c6f5e0e8a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNB82406043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa425b25b3f738d8e989c6b36c757ae9b49b9ae56733f4eaaa779c2ef2f3611e9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/CA5KR2520213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd071cbde5966b773130977a599ea74420f5d0c1ce87b46c74cc1eeed5c998ea9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA5KR2520214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5c32c7ce8020161a8e1abbd9b536aa4fbfda612f970e101fa41544d0e266ba. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/CA5KR2520215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bac6078518c1e092dcc2b8cc367df5041f66febd88cd688556a5129171e3dc1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CA5KR2520216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d4ef338bcac56dfa71869f8fcf81622bbbac1f69fa4d15a9d4e4d8c762d5bd. 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/CA5KR2520220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01254fb430d0cbda54f5951b5db90e0930978fa50e98cc00bff37fa0c3e80111. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2520221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ceac06931ec1b734ff5fd17cd3cc21e8db2b45a39f6d0424a566234896cd5f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CA5KR2520222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67779bb1403e1393a64750cb8386bb6f16b99088a2cb9fd7d398250040eb9f7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CA5KR2520223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0ae222807fb0919e2bd7a05b0391216d12fdb924644aeda706bb9da1f0418a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZMEQ2567336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c25bc3031662fb319ed8a896daab729146b5f59617f8af5725c57bbc762e51. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/CA5KR2530935.