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 0xf7f4e72f69048472ae5664acbb71b537c9469558e062ac70080ac7189126479f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e021c6ac-d2b8-46c3-b1b0-0483c934ff6c.json and https://artists.proofprofile.net/proofs/artist/e021c6ac-d2b8-46c3-b1b0-0483c934ff6c.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 0x784a80175b42cd4eb2e73f01ef49946ce3d8be16f8cdd787e83ab6eefad0ba8a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZNWX2074308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fde485069eef373e67aba93a2e07e6106b6966cbc3f8f4a7f899052d8784715. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZK6K2107562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa2b9f84af902a23d891a53660f40326858cb1d1c6e900e1d25281782b8aa58. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZK6G2164941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe338300f85d42e696d63f68f57ae0430fab1c39db8540584a6dc726d97866e0f. 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/QZTAT2146206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819477a8b2652fcc30f187296b0f84a437fa0eed017509de92a2ac5240a2bdc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2146207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee921d34577ced40053403af15ed2d37d49aa0d2d020a9c36c1b124c94944d19. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAT2146210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb565ea52816d5a383d429c2317148e8619f97fefe773f8a772859b92b11540de. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAT2146214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a22d8c1ae8f3f3db1c82b0d2a1ad469d4cdc49e4d38dc219b4a4df02688bd9a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN42229945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c89ad9d518df188eea9ab9dda18a5c9e10cc8ef7ad3a15f09f9736b6ffa0e1f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTN32250004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8196a0a6af29e93b3aca7356f6e4772f32d1ded5285e8c1784a9fce37c2fd6. 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/QZTN32250007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976af8ac93b7a5aeb6ce7c729199c3552282d1a671f39e2c696495eb93cadeba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB62213390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76b5dcae11427fb86ac15c49954f30ae1acb7d431153ca26778781a18f79a59. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:37Z), 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/QZNWT2272807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0987a95823f7401d9f0c6df9dde20d47c0d7d53430ae44ab3135cbabd4602b4c. 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/QZNWW2223569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ed4faf03aff5543f033cf7dc14bdde1f34e91c221b0cb19979835a060949dd. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTBB2265835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d3b61c8ab0ebf131af45307af1809b00d99f084fd35f3f12071cc92d712842. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:29:05Z), 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/QZHN72398529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1ceb1be264579ad282b35d8e39ace2d0cc705b5c293da2847bbb96086369b9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:12Z), 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/USA2P2329005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3121caa6a500cd98ee1f34efa9d00fe1686714d0f4f9057385cd91c619d0c51. 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/USA2P2339750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8668e9b3396c22aa749725c28e5345093a82ff4d864cecd3397880e4d6cb93fe. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T16:00:06Z), 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/USA2P2355063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc3e9ae3b19136e1a2fda44fc2b96a306a901952effb3431ab830b9bd4a8729. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:38:38Z), 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/USA2P2355071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530e8d1b83466fba5abfda43406b1f75a1ad13718e7dbd27b41e09d72b2c1fd7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USA2P2355075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd38a2c113a6e35336f1b619d8cc2b9418df446821e9607a1cf4e6708f2ab14. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:31:48Z), 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/USA2P2407529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5b0ed6a84c6ba94d09e4f674bc23e6d47e0fb065599da91dba7d7bcd30dc9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:38Z), 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/USA2P2407530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876d7434bf6dd6b50e304258bb9efbd20c2a1e0bb16129aecadabfe77b8eee0d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2407534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f9c0d3446015d2d70726a35b46a3d38548da9e878f16f787b18cc75b3a8c9a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2454935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e5be161f9fd5bd149e41fa7b15627e4affec0e98dc4be774039b61bd44a472. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:31:22Z), 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/USLD91769935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba984f64f1102bd8f01fd1e7887f24c930b1fc10c101b2ac8441ec821bcf568. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USLD91770899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449a13714273455128b1cbb67ccf93d6c2cf9a0d00b0836b4ffe9809e64b7481. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLD91774275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8d1d393099eef2563c7e95180d23948531e70794027cda3abfd45d3ca5791a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLD91780828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8424acb0b8f71f5e93af5c6489f19056a4cdddcde25b117959a2ec230be4b47. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USLD91782154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82d14e9b8ef65164a1e3bba4d4dac9f57f982017912950a7b0d515e4da94555. 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/USUYG1738825.