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 0xff0038988a4f506c5672c164b8b26a79e536fd1d8d6d6e97ce92132bc9bd0f3f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51b0cc9f-5b89-4e69-80a3-30050c0b1445.json and https://artists.proofprofile.net/proofs/artist/51b0cc9f-5b89-4e69-80a3-30050c0b1445.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 0x727f2d5e40fed622992c1d38a40f1881501958e7fded3754cebd05693c5ed20d. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNWU2527155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb466026e687fcfdcc7d129997978d7507323198fec1aba651aea572cc37f408e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZMER2520152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea59c458c7344328a944e251a1a5bfae282d7d1e799d1133bbcacfe4618eea. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWU2527156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1eb0c5d8dd7d5f98707f2fb1ad575a2bca9f4dc90b0f587de970f9bb14e6f3. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWU2527157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a02dc994ec01546e4400238c331b63e3ea320c83e6a032b732e70a9fc49ae1. 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/QZTAY2559625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f182358fc371509f38f19877c5919ed958d83f4170713d22322d6c7c75290c5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZTAY2559626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa1ab3d8f5c1210432771f0f75312cbfaaf79d6f1103dfed1e29ad9d90b2a01. 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/QZTAY2559628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c397578199b91108bf4d089b622fd541146b54946ae1b6d840650265aab7942. 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/QZTAY2559629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3094073e9c53716580d8ea5a2ffbe6ad123b9b95af43a1ba8a6b5a926094e4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTBB2584772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec84305fb37a7dde30d49512179134e65c853e607aa52f70345ad367ed709cf9. 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/QZTAY2559630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914a5287ebb528d35378bf63a6a6537d18d635ec0d7727e682a2ff08530e233f. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTB92551582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7233a8f0cd3e1f25c6c59356ecbc7560c4f2447393cf249cbdfd045f30f5c9. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZTB72516173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23168d275dbf6ab1eb96319fdf733994f97f9a26557204189f9894ca258362f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTB92551583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6817d3d4a28307cb02cd92474bd54e99ff7b940a814583c875be3e34f0861cb7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTBA2577960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d7f136c1b065deee828e450026a593a55a65cc6cb21948d3b0a3348d5d9db3. 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/QZTBB2584773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce20cc9fb5c05ef86c73b5712446ce7319578898880cea3f6f3c7236c8b7d7b. 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/QZTB92551586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e1b444d5382f867b64c016aafeb83d01e5b11915a6ddb70e6b4b3770134722. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTB92551587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b1b70a75555751ebaadaa9a850e17250f93947c315eaf3c31ed5e2dcb29bc7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB92551588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b5fd10dbeec13c271ce59ba957c60e7b0ef120d9fd8ba4e783530c69e09436. 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/QZTB92551589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d83bce4fb6e63c0703c9accc3c71ae7511fc4562d751eb705b33f4bfdd2e7. 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/QZTB92551590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee09e212a43561cf6e5826caeec7713116da0244ee4640bfb42302dfbe03c0f0. 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/QZTB92551591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d85b61b10dcc0fb76907b603afc2e1526fe579ab3cd315ba9b1962cffdf9ecf. 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/QZTB92551592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aefaca310dc3024d877720e6214252ff4cabe661307b436563401d3c5ad3072. 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/QZTB92551593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c338c39d4f58cfc8e148e0adc616d6d1d70c93c7fc6f8bce1f7d060eaa6f503. 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/QZTB92551594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7728130ac8a4584340a81228700c86541b8e694b5755c35f3f8971a7751e7f5. 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/QZTBE2594957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e41b45550d8248ba135b98b94b294c7ad670a3f9e1f09253296dc27baa9026. 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/QZWFR2526087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b44029ed4daa9a98c7a50d6462a8662d0f7ea6b6c2d37726426bef71384291. 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/QZWFR2526088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db0cb2d620aeb6e89814638cb19cc344c99f036b8798962154a0426fd1fa8c8. 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/QZWFR2526089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c17a626ffaa709332c3aca1d9b5aae6658dacfa2585e482bca5ab22643adb2. 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/QZWFR2526090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6840b01ee988e6ce8e2b7bee728359a4083200cb1d5af0dbe856d8cba85907. 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/QZWFR2526091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274c3f58f6c975bf87ce7c1fe583f04a99d6ec79fbe8e9f39a2cb498a532ad4e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFR2526093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea1036fb68fdb729bc93adbf23e89468df32be7fdbf0297e881ba8d71badeb2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3F82510270.