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 0x75e49961105b8d07075d634b2065f5815f5a50f81b79bb5ee75f8a1ef4fcd21d. 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/a4dccb42-2a32-4749-8a0c-756f94de7ec4.json and https://artists.proofprofile.net/proofs/artist/a4dccb42-2a32-4749-8a0c-756f94de7ec4.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 0xc51347dcf6f2c9348a6879ab60a5ade7bf9c9fc38e204d030a693bbea4337257. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAMYD2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4993b3fe70ec67c4316419f16efb59568ecfda0d649286c55f2bd7530b1c7eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAMYD2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a23dafaf827221a8c1c8080421ed7907d226188e3f3992af29d280f25ca341. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZAMYD2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12db8f893e001178580432eba78bc6c9b6af9d2ccaac04d5da1c4acfc8ca724. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAMYD2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f17c41e57f7901f47c124dcd381d1ae2e7c1400e9ac9f4ec09c9e831586f8f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAMYD2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9968642f5444073ae0ad41c2a9aec3e2c93d31d8582dccc6a06b2228256fc69f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZAMYD2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7f75c2b78b59f5e637257dc8128e62b513a30302813d084b799f7a805cfeb4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAMYD2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17a8ba08c81ff7970409b3a17a20bbcbb3d2071ad3c8a83355755cd00423530. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAMYD2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff2c60e241a9af794477b869503175a1beb46564e6f5b1028a8bf620bbd8362. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/ZAMYD2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95afaf21c6f2ef66407bc34fb57784b09fa9924a5f85f310fb59d1298486203. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ZAMYD2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1b0e866365580c08dd7dabdddde04487514dd95ec5d7cb7a5ee0488586b6a5. 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/ZAMYD2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe919325c4c5029a863647fc462884ab2d57c55b92defe05610914b8e17fdff5c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZAMYD2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5097131e966ac5b0b90a3f167a2dee20f4de8b698ba95bb18d19c681e0e03a15. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ZAMYD2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec1e7b72adf00d570fcb947fe16ab0a563fc05b69f8bbdca36870d9111e03d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWT2259586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4ca9f9176605245e6b7b69a79a99f228ac08494ff5959bbe2bf6f532767eb2. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZNWU2204645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444ff9c9a9f112f50e71ff34b1287131067fa1ac0f91f138ac32c2ef8aa54d43. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ32383254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0880a15dc8676c453e10fac180e8ed5873fb5fb57d2841743883a67e63e234. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ32383257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44c554bfa2fd1e3d56c167a17670b1c96eab2a57bc926f42a0ff00157a8f58c. 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/QZFZ32383260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2a5598c8ad2922f0e16a87f8af9453f1e9ca26b8ace0a94a1c6cb95041e84b. 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/QZFZ32383262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abb91b06329b930336a6f04137dafddf856063df47075ff9e3ce766484be454. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ32383263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363e1b11476ec384f947fafd530ed5c2166d68f37eb98e01eef691eee6f6d1e1. 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/QZFZ32383264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc352d730253d0cb1a5ca169d026be4dfe6bbeaef8bf75ade3fe8a07f398fddc6. 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/QZFZ32383265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17070499be93328a5d8c2e6aa2e34e4eceb2de7af712f757bdf90c1abdc3b0a. 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/QZFZ32383266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980260113b659326e7cf3438a3a0095ea49bc5975d43943003e27cacd5be675. 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/QZFZ32383267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347e8299ae3cef8c12726d2c151d171f6fc1bdad77cda3a07065c2d6253a8358. 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/QZNWR2337871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9392fc89fb2499769255b0b891a1c0b610fc12d2a1cd5682b5325340ecc944ef. 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/QZNWY2302496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967681ecabf5187fb415c130b5e9c63aaec43b884ea791f12dfb29a734f45181. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZFZ22417682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b2e81f7078ed370cda9285a0059420cd0ce8ba45497b9f282a8c3ef00ff08e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAY2425817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eacd71e68d1e8119a18e2489ab230a5fc3d8f04b5dacf38d0b56d2e6bc5af76. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZADOC2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330c8bca27a2d22c847ee0332e399e11c259d0f54d583095d159d99ac79840cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNA2419302.