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 0xb3cd0da4c93a83544a116daf14591054393ebd7c71b7298bda10c685c107bd9f. 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/fc4bddda-de28-4f06-8bd6-5b137ce04f65.json and https://artists.proofprofile.net/proofs/artist/fc4bddda-de28-4f06-8bd6-5b137ce04f65.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 0x02106722cb92d6c0e2c202acc4c33608e0db6346e7941358d0285a82a1621310. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAY2446041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fcbc25a1111f86f21f2f0510d1cd54f8fe4d6e8e3593581bfb0697b8c765f4. 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/QZTAU2499401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2d4d79e25efa47a6f513682a4351969153ec2cd0f535530810d209ee1da80d. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZTAT2486265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f09b52df0532e0a636f2f4a367c8b961f0f862ac88a503910679f73d2d494b6. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZTAS2428690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce0271ab2defa01e3ac28490859dc7c20a7126ef6772530771c77bc56fba35c. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZTAY2444717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7797068b62e0ec2bbe45529cff7261f866e630d1948216add2e72857b7a62ad. 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/QZPLS2345579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f02b95a2d77ff8f0be613f93ad349513f5ab916497f0353ea306c8cff4e0c2c. 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/QZRP42317666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1b0d94e884c66104da9fabd5d76b78a6e5877c0aa034a01a5af1fc7d0b595e. 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/QZXLZ2391611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d86872ce9990f5cb7fac4ac25e8c691fc938c4f51e61f6bf65847807ba3bfa. 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/QZYXP2362087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5470ad2de179e1b4e9e364265b653d9fe177524b084b33c1304cf7de9a760f8. 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/ESA012307910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536dea7415fa2288c4861bbd2fe2c407db4088c8b40e13ac00eb80a22ee02ef5. 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/QZZ972347248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44a134ef61564cdccb37ea357b5162bd5522452a6fe1c3478645cb73c7ad095. 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/QZZ972372273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2abf49ce85ca3072a7605603cd2fa4d6aeb7c7a9f5495a58dba1191afbb5d4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZZ972497041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92835df1037d9b67cf60c86ef01bbb61e63990490918f6b78891dcdb0f731f78. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZZ972432374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6323c60b03ff532c75fa169ba9afc0583b456e2ff1234599fc6c0a49b529a923. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZZ972446401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a8cc6a5407644bdb234bab87f3604026cf95dfe1c0d47d8517947ef4e35b50. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZES72489282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0cc93949621f97b69344d07cb08a9709957d538058d222166a7b3f0ccd2814. 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/QZMEM2464365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42b6331196877843f68097a635c274b61275ac27c1a46f44440af6fe099d9a1. 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/QZMER2481448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dab97c1d2cad190785dde574d934727d3e0c345cd52c2c118b604341c5367e. 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/QZPLR2493030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a04d63a213e46e5435e407f66e9f51485d510129c41f9e5f3d81e7790a593a. 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/QZRP42437506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc49579522e198354b5305fbf882dc67b7f38a0dea71ead11708d8a9830d31c. 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/QZRP52461581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756371351994f6447bfcd95efd944a5c458af2da64530029ef72853ecd11a6d4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTAW2452966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47d85f9311505c4234cb9f623e695ae0a666f7484a144a7e9099ea3caf34b0e. 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/QZTAY2434374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa22405556993485ec8a74158486d57e2f763eae50057e3744c9a8f5fb7c718. 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/QZTB52497502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387a8ea8ce4f57ca74fd4f490754750b1ce83d813a22fda8e6c6bed9cc462b20. 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/QZTBB2471733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d385a98e0b7455d12dcac12bd1ceff62a3f44df26cc74c674a170864fa6754a. 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/QZWFH2462517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b308263edd59395dcf3aac729f92d7bab23522314fd8c114bf7c410880e00c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZWFV2489228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9762ca92742b6a355d1ab3f7cf1db1c12fca0f821fdc5e7778d8b37be1d42f4. 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/QZZ7L2402514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c37eb428785760352a604d2d46c681e51831b3755529e2e42c61b599eb8bc3. 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/QZZ7T2453374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ba94e61cabdc8567fbf7955c205d9b93aea37cac782a6494130c8c73dcb85c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QT3EZ2450213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4a6ba1bf0bc8ae7a2baa14a8bbf81ed9fc99ec44a7970036b733ae6a596ba. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZHN82541089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9530d2578e7690d1aeb1ce6b84fae6f4d6ebecdc0f2bc149de39ad03c8b2e4. 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/QZK6M2539297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ffd86f17ffec6e58329d6bb22f8d4ff8387d65b883f5b621b769394e5b1498. 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/QZNWY2591812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889d2c31f726c11f995dd4e7077174bc2194c047d8242b19f71530a53477dc53. 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/QZTAS2586448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccaa65f06f5760d83eefabda0a8bb12c2026adcdf600eaf8a1191fb33b04567. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7Q2509684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8c4de16aa7a3f2290724c124f0fe40875f7342226fdc47064e773922c6d422. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7P2573894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a795f800688f769b200a44539b69ccc84e75ff510898696c75beaa6f8b591c1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7S2532468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46511f17d9b9bde5742f23e4ecf3bde37543b0d4ebb79a0b15f79df9331b9971. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3F92529313.