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 0x4465d609371cd7ae9615773b0992e56c4c4aaa2e9d26156f38c6bf028af232cf. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6740515-62a5-408a-8589-af6f5175c17c.json and https://artists.proofprofile.net/proofs/artist/b6740515-62a5-408a-8589-af6f5175c17c.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 0x9781fc4657b3d2cb96e8aef3ba3e63d72e98a86ef815bd4d2bccebbc6eb099df. 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/ATL632501201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4508170fcf7e6ca14e52b0f075c414135faac97bf0076191dd489fc448cd9556. 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/ATL632501202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014be5fc886d7dbfa8316fea92214bdeb38cf666555f481f4da1978b17c8902c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ATL632501203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadc31c397d66e8bc17ba7cb2b0ed8fab590a6364cd6506e84d6e61712165a0c. 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/ATL632501204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329db6d9180bebc3e1bfa25ba025a88fcc2299f086b5bc6134f8705784d0b102. 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/ATL632501205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e15169f00b55bfd67a7f5a238428acc4e38ed3feba041f7793e1df22a4cf39. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ATL632501206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cbb4502724ec5cf24dffb9439e33a1109cbf504f039dbfa2a55b155fa04792. 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/ATL632501207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c461c36efca54790dfc6ceb607c1c6bc34c8c20f1db8362f1dcecdf0d06c698. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ATL632501208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91eedacdc0078b027c7c2aaa3585c121fe162c4eaa2c76fddbd0840621c895f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ATL632501209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07789aff8f2e21b79f40f4434964cead80a2e32a4aa98897c64720f15021a296. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATL632501210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cfa78f46f0d795c0ce88f2654eae05e5805108916d6c05787dad3767d67496. 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/ATL632501211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1557a369ee8023cfb697092afce18f6f154055ee6e16e92c5a0c55ff04bd8174. 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/ATL632501212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3f6bff811d8be78ecaa1c87316ce05307a872c78ac0abd85c71871c35ef1b2. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ATL632501213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e739eb2522bd3ddcc76848fab18c35e82301918c0349fef9ec46f1a0daf8167. 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/ATL632501214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f90126f5d60be2b3195025f746672f460a2fcbf49e56814effcbe923f4af25. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ATL632501215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0f0fd72f9e84482b820135872f78cbef9d8fc748bbdcd71b704e8038a46c80. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATL632501216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441a040b6fc858a81fcb78d52958d71444342d2fc2574f92a22166e2cd82bebb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATL632501217.