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 0xd8bd213d8a971ab4829fbabc524436eb268857219c89dc21b9fa693806bea69d. 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/e9ae0420-c4fc-4506-ba29-680f93daf71b.json and https://artists.proofprofile.net/proofs/artist/e9ae0420-c4fc-4506-ba29-680f93daf71b.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 0x3e9122b09a0cfbde18af57729201643ace0c853dc90872439cfa2b218c4a2266. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/AUBEC2175961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb8c5a2b57f932d335bc44b14e018bae01ca550640614eaefef1c693606ff68. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/AUBEC2156033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5819826a2b22f0c1c9092c3986ab3232f1f40e45361349f1617800da2e1c24. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/AUBEC2156616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce59918204d275bf91be0fb55b2b2c00b1512f51a5e75a944e39de644973ecf. 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/AUBEC2156622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a60c6b817acf7c6576afa1e421393a8d2c1a929ecd595e2e24be5a686f582f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUBEC2156623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278fbf0d667fb58b8a3ab97bf075d34e2177d0128dfe26b007794deb3979cb94. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUBEC2175292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166c08458ef28ab03836b880a83deaea80dacfd024d6c7cebdb255b9e7b98ce8. 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/AUBEC2234566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1e485f29a010ef61e332d79c23633be834d694c8ab10b751d8c7c0465a189e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/AUBEC2234567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0942936b022c275b8a3d11dd857f6eb3cab3117d26e5b06d2d65dfe11f723f97. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/AUBEC2234568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9af5690bbf8ac6fd2fa50faf9b3e12ff1d8935e15b7e9620cec87253586d9c7. 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/AUBEC2234569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119ca250ab0c9f87e7c6ebb83574ea762f3822e81d661079bb74e416f061ba78. 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/AUBEC2234570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c3015817ffb1545da57b13156ca423bae23f5f29f39a4371c3703f7f0039c5. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/AUBEC2234571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26222b7791bf986753507148b50f6882239fb7e08d6c029f8cc383b3273e7f6e. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/AUBEC2234573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04ef4d4a3f9c416746553061b590d6c0985eba4bd516679b801a01d4efc7176. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/AUBEC2315154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2e19fb272435d36a7d66123239612f61182f7774bc1cb5ee5de02e1431aabe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUBEC2315155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d9e7c7dfd737495c4750eeac15d7917b7c7c9a4711768fcbda40adc37d2f7e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AUBEC2432736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9985c1951c5cf39735c447f6b86aaef6fd9754c6116ac81f8fdf167aa4fb1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUBEC2432737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a393684ee4575b28686b0a81cb7a59bb05f14b6d00e49ca784e27991c2792. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AUBEC2432743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36434fd5320c45a9fe2d3973578fff35d187489406efa6398764670c9a49c5ed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUBEC2485019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748d5a7a8e0a2919fb3bc2c7627e8842bb2f55b8cd28df81523fd2d5de084c1. 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/AUBEC2568954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be597f8d36f1105c82c96058b46a1ab82d5b9f32627c6fdfdf6e8495338823. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/AUBEC2568957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a0210459c599c9fa54a0193030558c27124c5d20a0c8b349aa61795149ead8. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/AUBEC2568959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c4117c07a6dca51d2d42768dcb29aff1e0de09e4970e3ddb9054fb05d7ef92. 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/AUBEC2568960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17d91235562f04a8778132cf07c430582afd2a566305d3a93406aa59178466a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/AUBEC2568962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cada1b9ef1a8fba0130276a3b7b8182197afb6a13bf091c09767967c9fbb6de. 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/AUBEC2568963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183c6e5312c889f282e9f2dba5095ee5860afe9c19947a7a098262a2a435bc4c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHAF2542578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f3138b8aa6118b6a2ab641a0c4bf6706b176e42a47c03146009396ef1b64a3. 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/GXHAF2542579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90eb1b83101bad89b82765a9d755e7173bb7fce32c03fbfdee88c230a5082e48. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GXHAF2542580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f8b23a63023ced8648775efb17b6c1b1d6d3d367eaf75c5c3947aeac44ba0. 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/GXHAF2542581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde404567100226cbde38f5976364b11820ea16fa3861309973a3354e888989a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GXHAF2542582.