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 0x93f7c4f51c78aa1bd28d6841f7307a8b30dd91376494438925e516dfb268421e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ccac80a-3f00-451f-bc0b-b458c276eaa2.json and https://artists.proofprofile.net/proofs/artist/6ccac80a-3f00-451f-bc0b-b458c276eaa2.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 0x2c63ce390728fe1ee7ace491d7e2648187e10edcc3b7690aaf50b82dcd6bd14c. 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/DEZC62347268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3a95244623670c807b42a35ffbeb9697da466787e922b4ff575b3e37af716d. 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/QZK6J2261113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa499dd73d44e6cb3d6b37dc616bf3cff37119c0e34bab88441936163b265d0db. 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/DEZC62370676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31bd91548bd10b621843b7d6aec5d6bb4a587e98de1cba741e111a57ba06794. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEZC62370677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ebc10c7e115a1416c39bc520b9f13ea15c4c1125af3c1935882e3882ebc5b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEZC62370679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3a95244623670c807b42a35ffbeb9697da466787e922b4ff575b3e37af716d. 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/QZK6J2261113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ac79cdd6be1d6a22053351967991a27fcf056da2d77db089fe05e3bf1851e. 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/QZMEM2237651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568e18e4d60c93268abd25959c40e930ea903633a14ecae710fe184d9d6d1310. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZMEM2237652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf669bd6bf7ea81ebc8c493d1d04df4161aa9e04ae9a7e8da719171577693a9a2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMEM2237653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f465437079a0de8754fdb81c6358ca22d0e3028cc24341f363377e37014a92d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZMEM2237654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3208105d2b87402b1eed94427775307c4747ae25e4c4eaed1938e179d0493fa. 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/QZMEM2237655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40fbba8fd93e8e2528c008e36e56f506c4eca0e3b3b3a4513b071570645ddc6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6M2291603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3633fe3df67c5dd2867aa99351e389c356a66b7601437a3e463d4818ec93f29. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZMEM2237656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f84a9f5b167b3ea938c803d78b49d8bc178593be0808110f09136c04a157af. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZMEM2237657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca36926543586e306bd9968828a37ef6b8bdcdc4ec3a809675cebfd1ab9d17d. 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/QZMEM2237658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c00d2b24c868129d531a08bd1561351bddfe2007eba8f63a7404f28cd2b3fd. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZMEM2237659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47035eb50ad3beb94f82643e36b7e7de48bf46498b122c467eae0a75e194755d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZMEM2237660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5de87c9c414acbf8e591477b462658847e18b80bbe7a9bc441a2dda36ebf1fc. 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/QZMEM2237662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab053b31355ebc57a29d9b5c17faf629b894af24f5b8e997118dca05c97b383. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZMEM2237663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc172199b5b0fa2642a99af688f3fbf29c3c898a5105dc711f67dc7dcda5a146. 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/QZNWS2155308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f6e925350330b8bb25c3ff69c812a05f273b1a2599014c715d32818c85a1e9. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBSMU9958421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b96728054331489e093301509d42016c8b4735ff776323e0280d3e607a6eaac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWS2155309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2672cc0135ca780ad0f2eaad14e5bc6428c3e01927bc016188f69129b2af74. 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/QZNWS2155310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61a06814bff4ba2785e9844cdf0b83255d36d2bfbcace499b2ddc2bbe359f15. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWS2155311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bb4a09d310b6033900582088913e55fc56bb8895d365c08c4932a3099a0b7a. 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/QZNWS2155312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d409beca395a0108efcc6352c09e03f95e95bc269e42eb697811f0d9f115c0. 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/GBSMU0045031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63d6fdf9aee214b0fb46e99bde35a3d0bdd4f7543c4c93211fc7d82fdbbbaf0. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEZC62433647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb05160c90dab2f5fcf1dc2a5b061bb50192a9d7c61af3c9a13abd1b8a081f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEZC62354773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d409beca395a0108efcc6352c09e03f95e95bc269e42eb697811f0d9f115c0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU0045031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffa5c7d9f977fd8b950a501193be1e5209b1dc416272920a0f9a4582b2dc944. 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/DEZC62400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a9e7f3f61ad637b6a9470cb697bd8412a9acdba5e5a836b9f02f21587630c5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CH7812351499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5de6d770c29f9eb2f3565c2f71b457502631e5773f172902f70d9770d3af6f. 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/DEZC62496232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a74bde4f3feedf81d1988c9246ff1ce54b752c7ad31e5ff3f4f85e5af2f7f1. 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/DEZC62496233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae046c5833220b54135305f807f631791da56d0a39c35e592bf0b4cb0c63eaad. 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/DEZC62496234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cc9eba2e166dba84efceee84cd8113bd5d7389474c33e7d1c545eaad940498. 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/DEZC62496235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3231069991656b2680630e820b260dbae67e7a33179000cadcb811252552107e. 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/DEZC62496236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e881941b0c2beb67e8ba51085c7171a5f7ed1a75d1f78a00874ac91b0d2e12. 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/DEZC62496237.