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 0x1203883ba9dafb3f6fc0a86d86cc21228206cb2bbd040142b95ced920c136d0d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86154839-29ad-4950-8323-9eb03467b06b.json and https://artists.proofprofile.net/proofs/artist/86154839-29ad-4950-8323-9eb03467b06b.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 0xa11ec28a0b9ade3ad7a216cd168d939caf3a4cbca80d795cb54cfbf5016190dd. 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/USHM81515106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf77de18fe4252c929661076ce557d623fbb828de6d5b3be808a99b550a8b75. 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/USHM81515114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3b50bf34acd679274871783410d072d304fd21f00ea2f206829991d7affe8c. 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/USHM81515115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5006487d5e87dea15fdc174b3ae506e1bcd35a30a24c2762c5b5252d743039e2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM81632098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259d6efd59a9ea0fa991d4f7e375024fa18566cfd6bf5ab8d57b4013086ae2c. 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/USHM81632100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7bdd5d2eb1310cf64444eb306a2efda693a115af108629f37a958a800622e9. 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/USHM81632102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae83623042b00b977abdad58a5799712a05c5d942cf01786ab6105f49dc11749. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ZAQR41903693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b11439f4f0175328296500b57a3b537745230544e4b5f2cd85729f17d584f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZAQR41903696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f0b519db8b3ff5a5284205d0c8595b1968179359aacaf3139813b9e9e4b030. 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/ZAQR41903698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f34147a6833fe284917551685f1a17e95f0843407d6f1c8c927ec232e47003. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZAQR41903700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fb8539bfcb4ae65e4068fc71a007a8d2d2cf57426069b5de46e51227f0a47a. 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/ZAQR41903703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839303d0625da026c82d03fb0621ad87004a9f25fff8026e193fb7faf76d3cf9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:08:13Z), 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/ZAQR41903704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a10d6284ee49c0e92fcadaee51bdcfef6fdd2a0dcb11b5927d2dcd2b10ccbb. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ZAQR42004300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f89895ff4f6f324f23cfa692a44042ebfd556de268047ecb1af40ceaaa2917. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/ZAQR42004303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3ac5faca360409bd50a2322658b8bfac8c2cc7b4ccaefb5f54861edde33414. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZAQR42004306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39546ff1bb94fb5a0251d8c4355aaa4e67e169a79a72ff511bf3d046ee37a8d7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ZAQR42004312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8264bb7f4910db1b6322dcbde29a7c0d20bced88cabd7936d45b7777d65c1b4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/ZAQR42204559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b49de07ca4f8429e6cecbba5417fb23e4d44134281aeec06ecee4f5e944669. 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/ZAQR42401141.