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 0x67988c42b371b3d5d5922fdb1fbefa19238b1208f3186a1074c5e0dc510f2733. 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/21d89d99-e65f-4f13-bee7-055f61089bdf.json and https://artists.proofprofile.net/proofs/artist/21d89d99-e65f-4f13-bee7-055f61089bdf.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 0x99da6d89cb4b37de1e210600d1f7ee7d90f40c8f063d7c32f8af24321c8c7415. 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/BKBUH2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065d9065bff344db32e107c82edfa0c3e13c9a9263a350208b3bb4a46d5d9d40. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BKBUH2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c1cbd8cf8b8de9d3219f66e275accd37da072e818cbd8dcd800b7b5eac750. 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/BKBUH2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099db4695d751fe728c1170347e899ec433b4834993c1ebfa0f30efdefd03d77. 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/BKBUH2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2402fdce52aa91a220efe74ee171cd19f0ff26cbdda52e3cfac62bb27faebfe9. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/BKBUH2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797cecbcbccf8854a5d41e2b7b39b6c48df4c48c839f80bb17c1b02792631f6e. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/BKBUH2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dfe41d26c643a4fbffccf9d5cdd50b0ef4ef22b69367d0e28b45d7446c3cea. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:35:24Z), 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/BKBUH2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9e39bfe71b46b8d80d809cc36982e10ae3d82e47df4767ceab06487ec935a. 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/BKBUH2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f2261b1fb3d5a4959cc3ab7f14b28bb84e829966e752fe90e4a4e958865ed6. 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/BKBUH2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb29453a9e4d1ecd5376016a47b2f065d90284e1133bcead86120428597e161. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BKBUH2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58471927c07bd3967caf0ed5c74d910778838bff0ecfbf127162a9ae15be70ee. 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/BKBUH2500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f4905ea436c42ff5b3c26464bf87ef214c6fcaf58b8a701555c07efd48947a. 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/BKBUH2500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459cf1b159f1a4b6988231759f7353d0198b8bbfaaf05d337c9cc56b33d89c2c. 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/BKBUH2500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a487c8866c8620179f29eb7cf7f9559e238a62f76e2e50e0ae662ac2a0fe7. 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/BKBUH2500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7686b18b6ea09182d086465517b506d09e8ebd936295c823213587e0dd2e1c7. 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/BKBUH2500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7436b5512b3e518025b01ddceebe118a84b6273d9a10af933c3d9ddb6fd5a7ba. 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/BKBUH2500195.