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 0x9d785124b8688d5cd01a5fc2f2d48afa92b86ea58cc893077a59674f35766ffd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9338c27a-e64e-4e2e-ba1d-6821e81124f5.json and https://artists.proofprofile.net/proofs/artist/9338c27a-e64e-4e2e-ba1d-6821e81124f5.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 0x565b8986b96dee88620fc51e2d1f84f13ae884b69437a47d74603577d7d8e289. 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/CNZ511800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c2fcc943544898976337393b84b8c7a704bbf887a32d96235c4abba3f7b7c3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CNZ511800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb601b6471fd4631937feea04c9b17739ae988e8caaff130e34dfa62fd434089e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CNZ511800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae4f570af3a412b0eaca256a43666edddaabce14ede0a9fa379fe14cc53819a. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/FR96X1916542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f988e95d28c55220797cbd4622972b86efa4e9cc6775b8f3a1d90d956466114. 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/FR96X1916543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c07e1c40499fd5d52abee0ef6f577163d63304d570749db24fd70ae170fc6. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/FR96X1916544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feea0e7e7df110144cc1dbf1726c5f6563c89710e3e5c4867570a79a245d422. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:13:36Z), 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/FR96X2147146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec552de70148eef5de906e7b7fdecb66f4de371f1db77673aea2e5c2346ee50. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR96X2147152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc534ce1d6752392928ea1edd96cd5ac0a1732cdc7efc7ebdf747e2ec2002828a. 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/FR59R2190357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188dd3fc75f890dfdaae56b68144d89db73fcdbf6b03f8e5240952ba379500c8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR59R2190358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8c022b6816938d65c2098f71a4d97b3038274cb200b377a38fb588e160bafe. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR59R2190359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1617b6a89d19f59dc75d819ab0dd5a708f2f03a0b6b2c8fc2de8d560a85b354e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R2190360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0279ffc76f2a38ced3f6598e260ea71c6672cb6aeac839a87c72c6e5030577. 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/FR59R2190361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5d1d3976d913b84d84f404e597c7a281bbf280511582cf0b297000523f1ea8. 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/FR59R2190362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa661fd8b95e93407203d4ab970c8c21ccae8ca9c71d8908f1d5fda05e9edde25. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:57Z), 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/FR59R2190365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad45f87a2319160a4d75f921b7b7d4183aaa21fb1448c5bcbb6df7ec755be3e0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR59R2190366.