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 0x0cb35a4838a56f83f9ef25e9e3337bc98e0ac78308fb959a22a5d197bec356ad. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68a6440a-d664-4c56-9986-0bb3525296c6.json and https://artists.proofprofile.net/proofs/artist/68a6440a-d664-4c56-9986-0bb3525296c6.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 0x4e9fb16f329100afc8cb592c42faff75a29659479e1fe7025e7773d567e0d4a5. 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/QZRP42524819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ae893cc21090ee15ee63d9ded91954c6f8f42d122a21bcb6ec415c4a5e096. 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/QZTAS2583206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cfda82bac3cf8b45fb652a87282d022a9af9db9f8f37de9b2fa7842f57fd89. 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/QZTAT2589193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6684788c740cf734dee305253cd5798e10677a7102e8e90674a4835792a45696. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTAT2559319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb6db46f9ea57a4d5f4e5b4084b646ad8d72b4e015af7bcf2d2bb879c07c641. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAW2583264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72822c7b4edce0acfebfc606a925c373baed8260a430cf01a25a517301a79aff. 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/QZTAW2586943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d6071a58f8a2786337b87590e1017d7bbbbfd552ebef85f3d11068f5878872. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:44:09Z), 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/QZTAX2505590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1420c7885c03d5f6289e1f00cc65fe0c50ff90c0b66d031eab822034a7c32. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAX2505638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80246313a98db2e63b9beb9a88c4d19c3a86efd38e2b1cc80eae6934dd8ea4fc. 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/QZTAX2553363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60985b634e5c0c3800c77ea8a82a417e35777b35d966c11415b7fa7fa97af17d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:55:17Z), 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/QZTAX2527487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cdff79d163e421c00ed6f27f7de83a8768504570ae7f137f8b7a32e6ad0dd5. 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/QZTAX2555368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbd4447a6f2f6c0cc12290769d8bb8fde46e8cb91e10ddb318da5182555beb9. 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/QZTAX2524573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33640fc9b3910d705fe913ec163b3cef6125df7bdd6af34c7448184a5b869c0a. 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/QZTAX2522397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f834517c1e887bf518cf2067bb59fdea760a8ef193be0e549a6bfd1f6688c1d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAY2510021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82290aca7e64cb5227e4f580d491b506740b6418c0763d57d02e038740fe6275. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAY2510014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e69ee69269b3a715a5460b59c0110e825404bed5840bc5f01a546724d68df03. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAY2558103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea07eb6ca3e72d88bfc2c2ff5b46ec3925044e3c670a4b656aeedf186a81f4aa. 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/QZTAY2557861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85b04da7e0b2b403cbff54bb5818ac92869db86993bdbeb69527f2c53f5dca3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAY2558062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8420a035a18d411d8e6a3ac06f398eeda754c8af823e646e3c3badf9c6c746. 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/QZTAY2558070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e377f35678da9cee87fe8886dd2f734a303fdb94e8f89309ecc513aa057a2b. 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/QZTAY2557766.