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 0xe4ff7c47d916ea5f608e64c491eeb517f9fb4d840ef51259cb474c831655dd40. 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/c30ba139-a5d9-4fe8-80c5-225c457c9e9b.json and https://artists.proofprofile.net/proofs/artist/c30ba139-a5d9-4fe8-80c5-225c457c9e9b.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 0x4deb1be1a197c303bd75d0cd1e10de3af32268baeb7590f5d8855409d0ec6ec2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR10S1506041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11c0cde8712d1ca16b622ca2ccab89368f9b1e1f02de95c26af5f6c576bfbd4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR10S1506065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029a32cdb34ba39dc534816edff4dc1367486b8106da62e40aa7676c96bc4af0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR10S1508489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b72d30ccf925aec60b60b82189d53f4f192258ae0b8450c1064c3aed9c552b9. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR10S1508453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a60adc212ffa3c616352d3279f50fe6d98b4dfde78e4b5d89577b05e7d2fdc4. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/FR10S1509274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b10273a58a497769e466e9c32d9349bf0fd5e8bc24ce132e98d644e6065678. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/FR10S1507174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f3da1213368a044dc52050f1b0f978e07edbd01232ac92e21f38286fda7cce. 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/FR10S1507176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12ee9cf998a57e029e94f729ee1bec640fcca444e66e18b030c32a1acd9eae2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR10S1507180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042ad3442e338f043072de269f09df73f7dbd5b54a6c765fca67d679f4f52953. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR10S1531621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeedb5d347afc5a5185ac703c252130abe005a22856149ae880d7246021246e5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR10S1531622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c47de49a1932e6117499515409495488721a1530c41f3d1c335db44d74c78b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR10S1531627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4aa221026a6e576ac4580ed96c289455603ac745f51c9f3b4b3889af9af374. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR10S1505282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76acad39eb91f42567060f898a7d60dc1b4f71538469a231215f0fb53d3d55a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR10S1505283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a508c3946c9b59476ddf15eaf0afb9de1d968dbec5c6f8aaf65608c248f27ed. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR10S1505284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b28f4adb03668af8fd2d7f4b051a6dc92bab110ce185c506682703bbbcebd. 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/FR10S1505288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1705ef278024a9414c407b1e78640cff61d144b39514a35ce476c54e0c41d6. 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/FR10S1505293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324946ac408a1558332915501b34603ae2c491155ca6d433680b9c622b625a01. 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/FR10S1505378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699d55c24aa0395a175c04332a1ddadbcbdebcdddc75c04f7b21519fd07025f9. 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/FR10S1505382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f7ad9cb18fbeb35eb55079eb0511863774e7436b57aa80a0bc2828fa929dde. 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/FR10S1504318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda38a50c87a5b7a92b936f068b540dfc24ba388bd63de69447ad11184082d5d7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX201569961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa6a62280501b01c58ab0828d3f0e9049557f3f92ffa5c4c692aca153653174. 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/FRX201569966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a174c2decd227d274fd29c99cada33204694403121cb649a0d6ed83fb3fa95f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRX201569968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f7f9d340e0299718f992222b3ab983cb77c9330dd38f6e8085dd70aa2e8484. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR96X1855453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36af6a588173916638ad4264f3450062d3718510ab84db74e096489afaabc53. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FRX282463502.