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 0x70a6eff341526baf368414ca53a906e6cd00e86650f8ff496dcb2ff0c2fa96f7. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ed79816-c856-43b2-a626-a00104d2cd57.json and https://artists.proofprofile.net/proofs/artist/0ed79816-c856-43b2-a626-a00104d2cd57.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 0xab143d5ce5c4bcc6f36bb1296a0273279ee3433a422355e37de6daf24fa0d63d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHM81265461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82f8093a31b8d2df702de7cd5a8ac378feee9d07ba6ac287e1da25f3701ce6f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM81265462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec57c32ab6fbe1eb616aca3535ad45a97d9efa42e945e5f040576b46d84285f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM81265463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdbadb3e5c4474f3e52f78a3a9ab07f7769be566e3a8f39b79ad148bf577930. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM81265464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b85c9eedda5092968397f4b4cec765fa9738da09ecee8c36de79aa122c1e8d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USHM81265465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8dca185d8f655a8b5456879d3a3192cae81419948ee2d774a321c6744e5296. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USHM81265466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aad200b30c107b246870b4c6bbb2e804b68115b109c1acbc6b31d7c985a4e0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USHM81265468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7290b69a8a0bcb2ac377901ea65f82be27d688c1d2bad54376609804bfc70f4. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USHM81265469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2a148c4b52a5cc90532d77b0fb03cd5a6d943009df822ec9185d31a917651b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81265470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e4381bf3416ded354fcd076da73ab4e62152dbc43308329409c2fc59b904ba. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM81265471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1250007ede51a3648e482942e31503bbd2a80aeb066aa575a994f13da9f408ee. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM81265472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b52a24fdec4e42e765cc3fe6f7c134fd2ca34007cb7cd428fc9c6c86c68e658. 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/USHM81265473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e180120556195186205ade7017629c3cc929f8ff0b4a7909f063f9a776fbb1. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USHM81265474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da93933fb02b7bd9c87dd049b3fa0293be3e3f4a824888b2987a0974e03f206. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM81265475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2a8744b023220fa81ca394f4c50549ba7dccf4fcbd365e6aa33c61bb4a20f8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM81265476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76f31d9f8d7b5b2f006e8308524c8873892dd891a09f7df8c703253af742339. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM81265477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa538044d30931b16b68a54a880427802f5890d0d648f56cedfb3619342997ea3. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USHM81265478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0262ed7f8af988615b951b7dd6c5e8254c1513502b698f691165737a6f61978. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USHM81265479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98bddcabb44654f177f6b698d8f56d835245c8fbdad1b697a3abba9d5dcf0f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81265480.