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 0xf358ca089000a2f610daf6069f1a70b273b258e9b6a6afc3000f432cfbb4bd79. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/303ea92c-97a6-40fb-977e-2188f2829a49.json and https://artists.proofprofile.net/proofs/artist/303ea92c-97a6-40fb-977e-2188f2829a49.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 0xc2da03925e0db78e33017b56e7d50c388ceb3ddd6e8a5c9da5fbf36f77b186a1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SE62M2237751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0349e1ff545a9a9dfed62e28473bc1186a4179eace2c941255f981114dffd510. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE62M2237754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0eb793409ce86152324b5ee3b9998fdb155721b3b611cff864c9475ab208df. 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/SE62M2237757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56d94a43306712c28aae969e43b37395bfea1114b7d5e24e24c17fd9596f294. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SE5752375484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4fb7ecd0c564edd25e5f65dd1b1324d76917e9de0a9cfe1d52ec4ea726cf61. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SE6XY2337645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47861ed89e6a217b48251973181e3af407305aaf0d4acaa2512daa2dcd992461. 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/SE6XW2339028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902a5b5cbdf436188b6fbebe7350ed6f2e4f3e7572d8bec4fbaa2f8470ef4bf0. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/SE6TI2379571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f2e562e7311de8cc88b49d738e5a69121372bcfbabb00447c577f0cb433bc9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SE6HN2470511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b0e5937436622e5f9ef75a34382b4d04e83e0cb12553391a7bce5835edb7ba. 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/SE6I32448816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0342e408c0a0f7652655115f05fee517d20c81dcd6dd8cd386e3c6d33c7d7d. 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/SE6QE2443921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6db07cc00391fa615f7ee15018b3e8966f250cf4ce6de133648c99e8d5aa48. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/SE5BU2536272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eea0931b6cd83f307ff7a9fafb1f8b227fb1833f30cc27827244af42b919e7. 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/SE6XX2507717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea3d2f71ac0686639fb890bdacbd1e95afb6840755472d85843324bdaf2778c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6XX2516933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a3870723b2b5357530986fca2bc2315e605146c78351e5df1377ec78da28d3. 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/SE6XX2522996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981fa98877628557c165d2914022015de036440e5281669237ef73e8b5dda354. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/SE6XX2528305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa631168733fd4388f4b94925022b11fb7cd3c624b305a0b149fdfab0d4629a71. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE6XW2536946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333fc12c2e91f710e04e0d3badd731127a86b027b3c5255964ce845476bae091. 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/SE6XW2543563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9663f44531cafb6fdbfd6111052e937004382593886fd44181534a68d717a89. 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/SE6XW2565141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657bfbeeca01eda29bfd5b1d51aaae4199b4ac0ee55ae8785c0120ca6e30953f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SE6I32513799.