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 0x1dad1c21ce61a44eafb2e120b9b8bbadab8779386fc370a4f48f38cefe35453f. 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/f3bf8118-a4ea-4b31-8c53-7219d05a7fdc.json and https://artists.proofprofile.net/proofs/artist/f3bf8118-a4ea-4b31-8c53-7219d05a7fdc.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 0xead21917ae68cf7a1f354dc93a93540fed1c13d576f0434688f14a6a1248b8ff. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR10S1850484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7d14b9e4198b376c26b61b5f30dd5f0db0e6d99a179590df215b335fb6355d. 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/FR10S1983174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29332ce8e533e0bbeb0b8b1fffba82b7c0defd02226e2a8e67bb8e5950d3dc65. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FR96X2263267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dd205b45e6430407ca799e65f9667fe744a9e7a0a6bc063776db074c087c84. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR96X2263272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd8cc055411bbf34ff0884e8665c3e0d90fb406b3534afc34c4c8056f61c6a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INT1S2200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32769f48073d583af725bc5f9a429b221b57f2f8971a286eacd0b0326e411fa8. 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/DGA052449539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072e17caf05da03f3719a061d49b12391ad6495aadcff343955f9c239fdbac0c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DGA072431987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292eaba4b35e3c7fc71e4a0be1ce4b4aa5c732f30746da1d702c100fedccdcd0. 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/INF052400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20516b3868b2ab29aa8abaae46d55d84569bed29526279479484135584e3e9a3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:46:52Z), 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/INF052400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c54cacf3db8a04bd69887726a8d969c56e3ee9d28a9119db139ff0aafe3e5f1. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DGA0Q2403805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aae85915b9091ec4da743c76e9e1d05737b928eed4aafde56699f22d0295b83. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/INGC12404306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c40bed216e1bf5393fc28bb1f76df01a04d38617f831025f8a4e18e2b85393d. 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/INGC12404307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce80a18fc4d9c8d26d88bbe8efa7eead705901a0635426cdde70835eff268c74. 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/INGC12404309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ea8a692a9ba5f1cbaedc1f314707335e4154817ad2d4682ceb6ff04fd0fc54. 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/INGC12404310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62df74bb53ffb9986c57a2f33355cfe4698fa6743422fcda78fd243e8bb7dcd0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/INF052400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54174d7273e23a019ea7f301d8a64d15c536abe89c633cdddd32660fc65bdad4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/INF052400312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5ce5b8c93424cef856360c9d6a598134fa17ebac624bd2133f4b1079d7c33d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/INF052400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497560e88438d5a47a444f799f4ba31337a0004eb5037953d3b8c421167e9bd3. 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/INF052400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a97bb404cb416247c9041611940919ba85c2c3e8ac0fac43f2b9a72187b752. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:30:55Z), 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/INF052400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ac4e5ba14e9ab4df1b40e9399ce5c379ce2b1676fe0c05fe0c0bbb60f1fda1. 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/INH682500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852224b5d1b70f3b3bf820ef8c23ef7fc3f86423558ce40372f58fbb1250dfd2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INF052500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea4bfad2a8a2dcfb05a4907389c754c82e4693f1c30614b98b283eb992e60d7. 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/INF052500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1377f2a9e1d2c97ef337995f5a93692e992a0db509ba728e0e375b8ddcd50b. 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/INF052500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f88bec42ff9277816e1b9385c5bb44ac7b65d130d279a31cc8896b9948d76. 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/INF052500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0affab629a869abe38ca886953e62a280319f40944af4d31e7b07edcf44d481. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/INF052500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7859a5d70f9b2bd9d304d6b6fcb664b06916ad73f0e89734d74195be7989a5f1. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/INF052500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f065179931125cd3b44d6be974780a3a5b42b9b4eaec67dcb875fb88daadc79. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:02:27Z), 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/INR732500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6342377f1ec7f7fa2b0bf0834cfb5e9932086c56f1e226d8d290162ab6f7e646. 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/INH682500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b351666fd611e890218b0cdc0ff7f04a2851f2bb39d18eb39475dcd70682d91. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/INH682500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d5146c4254f47d047a5d4eec9133cc55af7c79fc04aaeb0bdc1714e247042e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/INH682500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce123880d35763ac9308ca65bb05080d236dfa758abb7519cc7ce330c9902252. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/INH682500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fd05124d5bd1f87f71559096c49d6a2256b539d4838f3c640fd2c8005faf6d. 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/INT1S2300002.