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 0x080ebc88736bee568342bc8f1684d7c8387ce13c5da58d988c4c91d4b9998771. 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/42f9b4bc-7b56-42bf-a6e7-9bdb6803e90f.json and https://artists.proofprofile.net/proofs/artist/42f9b4bc-7b56-42bf-a6e7-9bdb6803e90f.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 0x5c736d4620b48492060ed650d908c7361decda738dc99cef550affc2ca5f4f22. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6J2141916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501bd9f1ea60e6a1b4251c334fe22244b9224a55cfdb614813640c6544e6d54d. 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/QZPLS2113503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52abb232726104b3f71a4b49f518de23348f0a4ff91228d32792bde5fa90990a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CH7812220963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f7357d6fb9f50ba0f4470d4819ae3eed3da1bc3b7636319e26132fd8d5df4f. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/CH7812225969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06c2699d15bc49f1401923a5b1a03543d4f7536f90762a86dd49eb90549ddfe. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CH7812227905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0719d2ca0089c470e7054e56374d40fe7ba78c1b1be6b6a4e4621f19b4bd5d94. 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/CH7812231732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa866ddbf236b1cb2372d49514053ed00242f3788b33356463d9d445a30e8c8f2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:56:13Z), 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/CH7812234595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe686a216be01bbcfddacab631d37c4be889e8120c4679672726e6fc3078fad00. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:56Z), 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/CH7812352987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae0b76f5753bf4fd9c30f1cfb19ddf3ca2a7771fc81f40b5223b7ffcbc9e587. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/CH7812352986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c1ffed78ee560c53a83b9730ae3fc80601ab28249f6b7c71217ca569dd798. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CH7812355706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f5591fd2523fc098f3121773640ab2bcdabf784b66cfbc368c18027f593ed1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CH7812355707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb511035d5aed2c891083b7eccd845a86c29ba5788821a317c57533ed403a7e54. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH7812355712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406774cd33b6e1f27e2643261985d3bce910210730e33469040853c576545b52. 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/CH7812533761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e49c0301d9b035d02d7a8f7aebfb6fa282e929b20cbbfc655685a7f4fcc4afc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:14Z), 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/CH7812533762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674f1faf779ffd7b23e0e8995ed79f440779138d77a6856c01b1c9dced1fe128. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH7812533763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1869fcad9a7e5a78da818eabfb3c35af38d2f0fb03704d8d3c1f22c1ca6fb4. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/CH7812533764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa58cc36697ede0f222371e4fe05fc768c867f447131a360c7136cee14ac848. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:39Z), 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/CH7812533765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dfa541d3af02cbd83ee53c2be73b2ff3a45b0d7e4913620c92e3dd8a4fa737. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH7812533766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe275451b7630f62fb439cc4ed69a613db4cfadbf4a4a41966516dd9474dc9ef4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:02Z), 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/CH7812533767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe841584d28d823de736aab5a395130c8222d1c5b7f1afadba5d1999c3abbfb4a. 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/CH7812533768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74072dc8b75eaecc631064d0e6e971b3b8c33f97a8a744cfd9b8ce270466aaa. 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/CH7812533769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7ee740a70f912e6683c935dcc79228a76a58c39417fde494749767b489ab67. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CH7812533775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3682c94dbf0e991607adfefba9427ab1c7154a5335340d15fd0461ada2c813. 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/CH7812533778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe33b08a26b934924bd8d4bb3839be945d8d5792961d23a9bcb080ca7f96baf3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH7812533782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7377f0eedde5b27f6f8e3a1378193708518d153ebc1b3beeb4389b9209e7d1. 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/CH7812533783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4490323d68aa566f9a41f22ca7bbf9f18c4e698df74b5efd7cdd96420f1478d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CH7812534932.