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 0x8b749cc623dc15872b1650807d00be13198c1523470b28355f8f0e0f4558fb5e. 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/fa040577-27a6-47b5-ae62-36e99db385f0.json and https://artists.proofprofile.net/proofs/artist/fa040577-27a6-47b5-ae62-36e99db385f0.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 0xbaf9864c63c427a689c7574f051d27d1eaf7ba42ace5b9333ed1e0d0fb2a4756. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/FR59R2260314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6ed3b6c354f0e71aa38440265568c551e33f4cbec03d8a388c78c9ba669033. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FR59R2260316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb887e59282af70916595691451763d8d8320b3b8599a2e63eccf4f9be23457f. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/FR59R2260317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb1c8d11ca355b7d0a792f9042c9e12352cade731b7caaf1eebd5847e60ba6b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR59R2260320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7486a5e203993b03e5dd48ea30b7b2431785020c47e233eac5072b1deeab3a54. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR59R2260322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaf647d902279d595582afaa883eaadf0834e194c1bed226f3ce577285acd5e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR59R2260327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e565bdd73c8e42c0a955480a6b2023ca7ac347b0ee522fadba18886d5f29cf. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FR59R2260330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d44b79581376cc0b2f01b629ed086172912c7e016d42784815f023befd44f. 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/FR59R2260331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c227d310449f6d8cec39b2797eefd07633d4b4cddc464da0589bb697dff8d8. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FR59R2260333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef2a46b6feb1b0744ba182c2a2fd7b4e8e86faf7848b3b795ac7cd2a9cd1aea. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FR59R2260334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb54d29e15571f5a281363e950e332302beeb39f7196d4bfa793e81f0d6bf56. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/FR59R2260335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a0ded0396c07b2c30e60089dd02cc1a019d7c587716686fe4dd8ad29088bb. 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/FR59R2260338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedda4f5d98aaddfeb3a577267ab48aac52672675576292cecd58f7124fdbd0da. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR59R2260339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a736a48579da08e29e15986f0cf328d76ae10b594aa3023fa6e62382d45c2f. 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/FR59R2260340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39252673c71720739748324a976ee26acca2b688868d052d420f36d988b23e8. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR59R2260342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe091263bfb52d3c68839b71e9a725177258932b514da03dd1636bd80f4d26abe. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZN882531542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc721d3e790476628212b8f37183272cea60dc4b09e3c0aa51ee921ec8d079a. 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/QZN882531543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f0c3ae5be2f53e7603cc7d446c2ae0f946d5f013e3243a3adb1bed0b2b4530. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZN882531544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f87563b40802f157bd9edaac65d1170c9f2df777d81177802b01e61c4c7d33. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZN882531545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c47714176314895170d8a866515e5bffbdcdef7aedb486cbfbaa4655a77e5e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZN882531546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d22bff3d8361c0bae63f20ff75bd39f99b20f647f6ce28fb94059233167a992. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZN882531547.