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 0xefa3a7bd677ea3c2846db436fdd126a6526eba0f5e2ce33c6f71ecbff757c79c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b4e3023-f301-4257-aaa4-c4a74a516bd4.json and https://artists.proofprofile.net/proofs/artist/5b4e3023-f301-4257-aaa4-c4a74a516bd4.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 0xc719bd2cc77da2876db907c9979f6e843b2de2d92934fb599f06ed28759c01a9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/IDA191300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae86040a796cd9462f3aee162915d8a2961c16d580ae24e6c8d9f8c35a7191ef. 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/IDA191300537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9ee9a8c0fa5115a7b78e73743dfec21fcab8c870c48671f3b070584424ebb7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:03:46Z), 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/FR6V82307156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23246583c501cdc060368e51ebc1afa443223bd9548069b8520b73bd1c2c86c5. 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/FR6V82307161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40088c2456cb463ebafef975f248d96b97c01ecb6b4debc8cf8a85b0a3693793. 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/FR6V82311355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f63156b78bdedceca36f30539ba53fbe55f4670dddd68f1059e5f2ee50c703. 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/FR59R1622462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1ae6eaac8c417160cc0b3137b99c0dee17f70558d32e94bdb339696b805f4b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IDA421900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bf334fb09c7533813ab050fa0090696b564fdea77bac63591d47a4ecd3e473. 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/IDA421800131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4b1431e4b5bcdcd3f33e3b8070c8ef5f87f81993c4113d00aba03000dca3dc. 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/IDA421800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba1426d104106daa647ed6aa89b3514efedc0eafd7e0468e6b89b18de32749d. 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/IDA421800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7210cc0cdfcec1a9f45b4980aeb0f4b050926ca814c6b47b083d8b5c8b9419. 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/IDA421900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf22d165b997b0219f507b9e8233f880f8686852a1ac08a518c516ffe1b50a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IDA421900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f90d6b79ba3e03972dd87d64bd94cd05d67f4a554024dfbe42f90b7909578e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IDA421900151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91518623caf052ee9f95c0b0d31c0627bab33f58d7d037a51cace7b0750b2deb. 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/IDA421900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eebf4139ad5a6cafec67b0838650dbb58ca9c46d082c0136daed944ec4f7bca. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/IDA421900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb0ec9f0c3a0ff1016e1fc6df72d3d1aa37003fb9174d8fb0c12061bd9f5170. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:35:09Z), 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/IDA422100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44508fed7b714051819ce40bdd9dbb5f42c83dcf2872ac924774991435f0a7ae. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/IDA422100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2718625a05ab0c46a2ee64819c2cf5b3b04b60d6439ee289cb8929938e8a02e. 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/IDA422100267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc031e24f5f1ae17e8ea7e30dd1228a744363c33176eab55a34d568bedbe977b. 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/IDA422100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd048ed4451fb5da45359349c80def0959340e356bafea8946355e2d71304a43a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/IDA422100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8e9b20674d53a5e612bbf8c26647e1e6e8d84887a15919bb3d208b0db6fd53. 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/IDA422200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34599fcfbcbd122af58d7f2e966d70449f4c9c42f8949d3f52d6c5a27a15e86e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IDA422300432.