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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f168668ee9775f4e5089666c2ff69f5ee9124935cd37c6659b603904f32ecc0. 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/21319086-0efe-4d88-9ff0-8fe98711af4c.json and https://artists.proofprofile.net/proofs/artist/21319086-0efe-4d88-9ff0-8fe98711af4c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75ee1007844d57db9fb0a24ff2b0a817a440d2fc704aef8268350ca831a4ce9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAW7B2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a0a338d914e2f1c69f63d5291d5e2fc72b80b44a16232a2ddbca752746848. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAW7B2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc019fcb33cf88aa13b0119fd04d3d611f43dbad17dcf51ae253c5532f26dc40. 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/ZAW7B2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580bb6cbf501347441fe4170b6300836dd7aeb01e10400cad8f21d008350522b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAW7B2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d528c3ac0efd113a5bf965560a5f6bc8e74f15538f24eb2319e07570425d7b8. 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/ZAW7B2200000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5950301f3a51c2b4efb67178e64152f358e4dd3078e7ef0c0e219fa85edf2f89. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZAW7B2300019.
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 0xec97025512777779c37207745098ccd1c567e4998d47c9aa5d38673e9c543785. 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/ZAW7B2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5fb0b37d7155cf6f89a4924c39bfd497d2cd621e161954cf08463326854c6c. 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/ZAW7B2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332f20c575e98cbff4f410ccd72e72247c79daa44996c6161ca2d72846fa8358. 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/ZAW7B2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec9e63cec92cf926c9325c01afe810e1549f65e7e5f410b4b167b918c86ff64. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAW7B2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133ce9f0d6c22a76fca3d89b4b03655120cbd4d1433a24d6c200ad1d0a006370. 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/ZAW7B2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcbc5a2389cbbd131fb3fc87e67ceda7c2e0185b5bce8c9dbd2f23b49dc419d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZAW7B2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f93e4fecd26418dae44db135bf302698da3d02640eb4dac4f082b411d4b02fd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ZAW7B2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d26f6265d989219060a93517b7cb52f7304a961cb0fecaa8805b334ffc5ad63. 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/ZAW7B2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708f555edfd44bcb0e1bf89e706a374fdf199bfa7961aaefd023cd6873dc5d66. 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/ZAW7B2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce0d5c3d084f2eb45a78c95523c679c757a150c12b1655f3bd5d8a964431430. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAW7B2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe115d28d70655a923ce826e5fabfc1abf857b54c81e17ca40fae49cc785b60c0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAW7B2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eb4d955d02b6212373d9e4de473cdb479ff31e0afa82bb65d119b5ea266390. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAW7B2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7f5662f8750dbdac04d5342fb35a722344b336f15d9917192d0755e8582287. 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/ZAW7B2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d0dcfe42772f3e8afe98b8cd2597c30cff3b6544523f29a8bcfa638aebba9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAW7B2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30fb6783e286bb24fc139929b9aa5b01770ed16589ee08260cd7260e9eb4d67. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZAW7B2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d164ccfe80017e7c66ac3e2229dc880505ef4cc706cae7cc6b7448ab5a5351. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ZAW7B2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb244ef5666d4ff54ab4529aeddc6e4d7558c125043af130fde3a8923787798a6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ZAW7B2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1143d63059251e8a1632860bcc6397bbd3112204ae56dce5520522bd7c31d4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ZAW7B2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d083f847cfe804c628faa1b2a84f04cb26d91183d132d03e41b55e1513a13f3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ZAW7B2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe101bb4d5a1e981489c93ee980b0422e9d4f8b48edd6c5b3fc1bd7f2ff19ca57. 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/ZAW7B2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1340be956faae48e7d44f8aba04cc0ace27b6248584d096246cec4af988b5fe. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/ZAW7B2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d5b685a86b26faa82ef4115f07ed6f2ba1a794baa5ba4013a12cc50936c1c. 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/ZA58Q1600221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514bbd1f81a9974cbb784034cd1a660a089a241f07d9302146be09ed673e993d. 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/ZB80H2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ad9194ca4288299b96c6c7bba4ef3922ff8e9ba1aa3311e0fbdca730bdfda1. 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/ZB80H2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaed52fce53528a9d435b55d8004625f9167f93e57a9b8a89a541f2714bb4288. 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/ZB80H2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bafc3cc4fc6547e4e5affea293d8b2bd94093c3f704795e0c6147f637fcf557. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZB80H2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f82b9740367b18a36c9968b6d15831112846e68825fa6529addb2573ae62eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2320629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3477be84cace529f1d5e92795181f9b4f2c5928ff007ae85a87b18a0ade5ecf2. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USA2P2351657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdc3f9669d49cd621331867aaa812ffa21d577086d5be9222561577170ed076. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2351659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9def12650b2e78081fd758d5d03fbf98423ac63c2174fe1e79bb08e31a9daaa. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GX5MY2397158.