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 0x929da8be4f498d54038770ae0663fa75252b5d86d029477d9eedcfbe614bfc4f. 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/f3cb5870-7511-429f-ad5d-a06221fd5b65.json and https://artists.proofprofile.net/proofs/artist/f3cb5870-7511-429f-ad5d-a06221fd5b65.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 0x4142f2caa5ba6433a28eede1335c2a1a5a0431f38e23b3f30c96fc4dd6fdc36e. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/FR59R1929219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2a403aca1a2690ba49e81b4406330968bf3bb465faf72301aaf0c69e4596d5. 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/FR59R1929221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb253bc8e28ce26adafecb5f433d50bc9a3b17aeb91fa2ea1aed8410d4ea48c7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR59R1929222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cb4ea594b7157d24da76b3091d8c0a5a8f74ce95a4035e7c38bb5f42d6fed4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR59R1929225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d5ec971ea066d11f1ba670076f6e6248ee7333318f6b9fdec37b137baafcee. 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/FR59R1929226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35b3f165140bf84890a070b2f23d5ed0d7b476630889202d672bda5a5d21485. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/FR59R1914155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2014e9117ddcfa21755080a3411992ffdbc03d9bf34ba6a910e635940318b462. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/FR59R1914163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fbe1d6c4fa73c9b87fca820f1f800a80314a26fd767524b9fd05885c1f85c1. 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/FR59R1914131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3161ba6138d56321a0cbbd935a382f84980aa143564887e54c822e95dfdb4bb7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR59R1914157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d785de9ef2750d1ead1459850f86ed55c2c5824b2be464b62f20eabf0c4c42. 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/FR59R1914160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dbb8779b4f5d1e2447a48fe23c6b34ab56d73ed63a959e12b0a1279deb2c5c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FR59R1914162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2199546e9e4af1fd8af446520a60011172ac48be37587b9f533121a42759ebc6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR59R1914169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc974ec318aa76c7d27cbcb681e23815112fe3d8e905b951e1ebe687b85d22d9c. 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/FR59R1958332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f00d5161d12d65deb5ee3f3e1f27fcbc43f8847bf8c3c8d05d8c8dfd5ba62fb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR96X1960197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9200d6d43b02ad6027c58862de8de0f5d1f0728552b32c0bc631fc80933eb2e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FR96X1960212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4397ac0d2991d8b270f7ce57fd3a2dc22389364304f7f7909f7794a48e584876. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR96X1960211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9200d6d43b02ad6027c58862de8de0f5d1f0728552b32c0bc631fc80933eb2e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR96X1960212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9311c9f6f2ee8e905d451c7857b85f2f8270ebaf169164375523de462fdf46. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR2X42148985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917e73db1230049fe85bfc2623387a9ed1e3db2aeb70d06e64ab270a4fcd0d3b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FRX762152253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb733dfe9a3d41e729104396c55f9acc5821a7b83701dfcf6303ae36c5aa96785. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FRX762152252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3679f3d45430bfcc54bc685fb6272ab82618cae67ff7aac69023e5a6161ac73d. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/FRX762215928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24625a8aa1fda17bb105b903377e12c9575b95978611e328635a0cdba54efc05. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/FR2X42348233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ae1dc42fdf31f9d1077bd9eff9f05b1f3770511db5eaff9fe2dcb4340d1315. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DGA082342913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa436fbdd084830b5a15d5e7a02aa2ecb3cbaa1da39c947cba3c4cdeb866d5f7c. 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/DGA082342909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83be1308a4c157008b8be9db2c420c0a7d55637898ffd0944c5d3982b9409757. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DGA082342335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d27ef6cbe27ccb96dbdd2aae9f7881d76745fa461600f831316a01e92bc6ef0. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/DGA0M2322060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35295cb0a729b42998ce06bcf83a3125a1a7eaaa51bd846fe0b47e40f0fa054. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DGA062444774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e17dbf617dbdfb6523022102c7c82ba4c2adde2fab21a87ab8b8a26963bacf5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DGA0T2403484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244e30eaa3ed5dd70c6ee5a9bb62ea18e99d06020b7e13dc12d5457b2f2cb7a3. 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/FR59R2500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e0792eef090eafd168a32bdb6c996dbe68d0b47addb617431c90a214ae92e6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR59R2523310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dd88b11a6f7dda74e431807c8ddf5a95ecc31fbe4103470594ccc8690fc15f. 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/FRX872580567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1273b10cf34f0baa734f615b9d47b6a3a50ef6352d686a1be4db6b669796be22. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DGA072518612.