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 0xc6c7e63f48178c07ec4c97b8b0ec7c44e1cd5edd84e2a66942326e356973b968. 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/8c398a48-9373-4bba-a911-292e5cb01bf6.json and https://artists.proofprofile.net/proofs/artist/8c398a48-9373-4bba-a911-292e5cb01bf6.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 0x1659f9f1c13bb10bb2c385d8792061a674cb5de4098c75c02b542bbaf4693484. 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/ES64E2484653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00c109b05cbf186bd77ab27e9387bcb604b2af7775692f74d44770999913749. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES64E2472883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6788aab6f136bf698f2e88e22f2fff76fde75b7157b7bce5ede21a9de21026. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES64E2471248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6577e2a1e197abbef01148c9a468853ab7bddcc2e96e6092a1ee90a2f8f981. 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/ES64E2464192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24825ce9584fb0dc912ad5fb47d981f66fc2659d8ff0e3afe7882dbc2135020c. 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/ES64E2454733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d799d311920ec0c89f0423eaef04e740f287f98a50b8f1fd022cc703296b784. 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/ES64E2326314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97569bdcb434fc2cc23742c9aeebc69974b48c7056842efe2b09fc9bd3455025. 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/ES64E2415014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed1aef40ff5c7454cec990726f1fe7e2edd5882cf3d20782aba5062b1d9caaf. 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/ES64E2475439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b0fa8ca6fd76e76e86a7b214c65bb59ffb165496d7e73aa6dcaf6b089df64a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES64E2472647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1909e349d6a45d667d46212f770071aad67fa4e729b1e123caa69ed6538d2f6b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES64E2503904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed32762f58bd75ff6bbc6242e50910ef9f7228d7ac3e04e218041effb1aaa506. 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/ES64E2415020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6fb3da6a1ae6cf835123adf65456742a060846b913cdfc4de89cc3830d4d78. 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/ES64E2415035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae28b6c489ea9a2f856023cdfe4c810ad81463873ad2177f46fc8f717790c3b2. 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/ES64E2415040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e157bc989c9681678fee511baf50087606a8a66b2a61c6c8a8aeb2b818e1270. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZQAY2545658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c70079e43f77309afd46105e96edd4eef60b49c1f0a2e6f328d0ca0f2ab28a5. 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/US7VG2557968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6423f1a2485f305c296b5852b7a580af371fae40fdee5b9f0821f24f5c7b9d0c. 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/QZTLA2507975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa11786b59afa7438f9516b46249be77d346f8d56ade8862f9cec993ddff751. 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/ES64E2415016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17550cd145986cb9e2821022c7bce7177383075c2de6f1010f11e543f767abfe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX9P2438269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3974908ab2632d142a95803d06c71a1aec8637246a16e510d3b0d2ad5f813d. 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/ES64E2405055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ca78f8f9a13951eaf2373cab2f695fd6178f6a8d04f1adad0d5b7d495f0bc3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZTPX2464994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b1fc0e710633990561fe7b37ae5b513e4027badd290e3cf666cf706b27f182. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQAY2466575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba17e96f850fca7e512a868cae278f6766f2765593497011227776e798bf17ee. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZQAY2491586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a8ace747b0d008667a71e1cd7365958dd81aded90a28da9c5893c76d7d1b78. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZSYP2438250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b60fc064b8be4439a2c87c28ce04b0165bf3d8fb67faa528995590283fe0fd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZWDD2492150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad04b3efee9374c5e5118ebe97b0fa4a5a42a97f60b70ede4a07a0afbf48540. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZTV32487358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5786d0c538a15d167562c683b73ed5ed595eb50538169ec5a8adb0696b25037b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDQH2417279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb74ad53e22350d8935dfc619b522d1328886f6c8ed71375b57f58bf0995195f. 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/QZTLA2492060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c46f3fed0c3c8b73f9470c951d2b4604117afd30f03f2f31cbc1abbb1f7f3. 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/QZNJV2477385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cebd975d981f25e64993d3f212e50958245c69c52b68d8cf5780c2968af5ece. 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/QZTLA2481893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32e3b7230b4aa2a020516a77cc1c2aa915118f550d3c42f6a525d4e3e51a0ad. 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/ES5022400952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396420bde74861f7e6a9212498f3bac06d3dd2fa17ff9bc0a5e2f1b2dd86b223. 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/GBWUL2488373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421f79e1f8e260a830b248c5c08c92ba91265e984c64cd06718687398a24c88b. 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/QZQAY2442322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865eca1752004bf935f74c7d493bcbdad2c805a1d6634bb7f86c0128c21eb018. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQAY2406443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac11b1fae75351dccc5e3f95eee30c87bf92149d3e300aebd9c57994fe8c58b6. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZTLA2458166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284eae19022c69b26ebdb76553e8fe83fa53f9e9329c0b814dea4932326a8f5a. 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/QZSYP2367229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc7f8e4d4ec7d013383310daf214bd40fc6499b5d50df59acef2cc6c32f92ac. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZS7J2339012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d62468531505b0f66280f6ce640042639b153bdca24d0f68a6ef2595ea9a40. 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/ES64E2482515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e78dc6d7997170a809fda589c0c09c7cca6ce44fa49c0371191a7e8ae46d0a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES64E2487634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc004f12d7c474c4fbf517b039b84a7df7af31e4a8fed626e964adbaf787b8fe6. 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/QZQAY2476089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0a0c2a61533492a78ea2d5353e1fb23ccb821a468baef2e0dcb9d5bfb815e0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ES64E2408606.