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 0x6fa67db1e8ee92221f0f951d9aa7237831d0834ae61b3372620941354cca1577. 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/028229f0-5884-4b56-a815-93f04ecd05b5.json and https://artists.proofprofile.net/proofs/artist/028229f0-5884-4b56-a815-93f04ecd05b5.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 0x120ff840629b05e7638f22ba81a82f9f7134ab7a6e4d3f55248c6b6ee0e9dd2f. 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/GBKQU2060527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a0edd5dc88fb96a85cef496c1197598c1ae7f79e565138e561b44cc91b176c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6F2426570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b25489b91c0d86130fca6c5deb6b22a30c2d88cd539e5820b4ffa490ac95d75. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZK6F2426571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d809ee07b887df9fe07995bcb2fd4d7940a9c4e44aeaa8113d0c97aeebf540. 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/QZK6F2426572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc73eee8cd238727fd8ac757472b9565d99857913d4de05c4f68552b3e06ec4. 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/QZK6F2426573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45075fed45f158dc6127f73b13bbf3f21518e47ac60205e2f9fc687163f3f2c. 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/QZK6F2426574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962cf384b0c4244d0f7516b5d2d32305d6fa446243877b8a17bb15efc16b24a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2348658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a7dc9640a3cf89a0d4d9d0ba3a5dad3bd8ac321c4903e7f81daaed0738a55. 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/QZK6F2426575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a35cd8469825a8f2c18481fec2acda597551f0a420a972548e7e142b229201. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6F2426576.
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 0x28d5fd1a249e8a5a7dcc4c88bfc02519c5cca874855b362549e2ed3f8477248b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZK6F2426577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9da65ef2ea4faf47e09a6d98c28905a0f1e0e7ec00693159350ac2ffb99a9c. 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/QZWFE2355585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aee0e1e52a90ee2df378d5092c5202e294f7c569999846d97c3dd3c7005338. 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/QZWFE2360401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2561a4e6c94474d28f86101bcf633a31e96b4c054883e591f60e6b46f45720. 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/QZNJX2353719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cf92b731389a2f0996707c73d959f62b019479cd148015f9176e60c5db8d9f. 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/QZHN62283001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a8287f4ca0818447b6fbf4045001b740e1b31b978da6e0685940ba6d0cffde. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMEM2035424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ab4887a22f240ce21fdb054fefb078c5dd2c90da6a26f0167291d0ffcc078. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZMEM2035425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1e3498f49e3deb373474fa8f3b75917443aa4a73ebbff7ba31d775cf8fb001. 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/QZMEM2035426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b49aadc9af67010d754e26b4976ac38c14bc876416156ae977274bf72bc50f. 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/QZMEM2035427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9af1e319da360d98dba297cc02cdbbacf35526eb31bbe97a7468c5103411d5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAET2071623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea990da3ca4bae8d8ef6935f40e9c4b01fa46cfc7b171960b559d5a2bd8d347. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES91968080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7c1b6843668fbc7054d880bdad015cfb86601a6a30609cd214d68277b911e6. 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/QZES91968082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb0990805fa655f1628204451001869db1cb488a4384c520f5332b1b96fa074. 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/QZES91968083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9fae45435604442128746474db1872a980c997bd8af2a755ee5df7488cbc4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES91968084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d0966ff3e9098e048b719a3681a6e1e8fee7e102ddd8baeb54708fdb564d6d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZES91968081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02b11fbfe066ab800551c517fbd0ac797be65259b5c2dd0b126e3355b7c64b4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZES91968085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b33a2cbbf1059ab3a4cc2330774c0a6f01e8008fa93cc5a626e990297e160. 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/QZFYW1994199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9c41e73ac88c27a73604884319fd3322c63244cde643de8a304fc549075036. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN72001670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a0fe054a4aaea194eead58f9b9653dab35a0ffb53d41e2ab7af5dbc5b74295. 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/QZFYW1956387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c790fa2232326126b3a2bded64a360bfb00d174ff6d1be748a525fa2d92768. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEP2085243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561fffc8a227ee6bc7e35413d87b339171eca8dccae4a6ad849ee390b00a24b7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2133280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c65f7bfea423e2f3f8c5980c920c82a028c2dd03bd26e2b604746f1d59511cb. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZDA82152501.