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 0x77f66789648b77bb149d710ee220dff38e1ef5482ac7e6d53bc9a625e6472303. 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/fe01e227-efe5-4221-9745-88fcd78e506c.json and https://artists.proofprofile.net/proofs/artist/fe01e227-efe5-4221-9745-88fcd78e506c.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 0xe3d8e94791b89ffe6966a036bdfdbfa6ee808227e2b2a8082c8e4dd438c03637. 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/DEPI82417094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe128321950e93b76a804b65d8970d93e49e8b5ed8c9a63a96df5905165b1c1b9. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEPI82417095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20bfdbd021daef8d01b884e292936baedec0eb10e38506eafb8dd47e79d61ee. 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/DEPI82417093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fabdc7760005af7453af2d4ae429799049551495a66c96f749190466360ece. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEPI82417428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e31a5cb3f56ccc226551f9aa7f87e668b89bdd26fccddaa8087523bb11bbbd2. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEPI82417425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3579c28c47f59b51765494cfbd8e4f794f0e278bcb0f6a41ef17d6962d3700. 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/DEPI82417427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5982d413af0cefe337e094ccc63691ec8331517ef2ead370c7154f4d93a29ac0. 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/DEPI82422664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb251121dcc9f8b382af608c9d37da8670fd970631c565c31e0858b6d7e378413. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/DEPI82422662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff4af05d0deadf0ddd35c6658291a3015a10c4ddf9268dd05d539d713ec7fc9. 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/DEPI82422677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081fb65e8a34167dd9ab8fb6d02296951073b78830bc6402471a680bfaf74f32. 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/DEPI82422671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16d66a6c3464d2775207dacc061dda37fcac1bcee499e147db6c56e36806c55. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEPI82422660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7778bdd865e8b843e5c9e4909de0098cb643321053409dae0792c4989b3c7d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEPI82422692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde4586db11059a487ebbc6781c619a85116ec9709f650885bcd162179011255. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEPI82422691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa1d8dbfb150d517cf09db3687c36cc27e6246cc16dcf61618ff04406e6388e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEPI82422686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb45e409323606899e2c830f815f3c29f51c38c8102c7c1bf9a5201eecf1bbd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEPI82422693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0d01fef62136d578aa7849bd32c63acc501a2422fe0fc52e6e680010a067f9. 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/DEPI82422689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da649ecbf2644e2ec602d9c3c4ecd4726f015032bd22f08dd43f09f34f89275. 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/DEPI82422962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc55393eedb3c04b133422a40f254b7afa78c178ddd1c1f29f3342ebe7be1af. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEPI82422960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3480f1cd12d37f207c0c094aa6a1a4a8f4f6e1323c1f13b3949f5c4dae9d8913. 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/DEPI82420199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0de5481c688148a832df46d34d84200676a56821f4d1747022a8dae9278b81. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEPI82420198.
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