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 0x80496f8c710086c28a90d6deb626fa13daeb4dcdb62e83fb9b8df1777f702121. 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/93bfd318-0051-48af-92ff-60d66e2215fb.json and https://artists.proofprofile.net/proofs/artist/93bfd318-0051-48af-92ff-60d66e2215fb.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 0x39e8fef538102c06ee00fb61b80f6b25a4fe1a30496125c491c03fba0898611b. 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/QZGLM2059187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5053743843e494e4540ac0a2dd82b2bec9c1a6beb33b5bc9fe0ce232fe8f27d8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZHZ32055585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f7ce71e113c4926cf86f023ba75d6c4f16bf9b04f9c4bda5705176a3b392cd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHZ62020407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbd1238655e82a1665b128899a611e0ab8d64c55cc71dbc0918fadd29d020fb. 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/QZGLS2165176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85a4c745cab6fbda1c555bbbdc94fdd8c1841f89df2abafdc12225d46a6cea2. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZGLS2165175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cbfc1e42d84c9d681a4bc6e860b535ce75901ca740f787994a03f52748e322. 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/QZGLM2139342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859b5ba7b8f2f3cb262fc080f5408e25d576d3f0ba4b41affcb5c42accd84915. 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/QZGLS2165173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6afcc79a0966138bce58521fdb4d47a092dbafbe7ee3298b9ea2350e45f0420. 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/QZHZ52113742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3215d29349fa34aba318ed86d59b1590e19609b5a0781e1704626cd342b337. 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/QZNJV2134641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b81218af57b2e256f6a2c12bd60edb61d6bcbddd547f4516aa0528ad2de74. 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/QZHZ32255313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81e358545582ea50a70cbdfdaade26da2113d624094ded0233266b32eae4afd. 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/QZW9N2218969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68123e71c9f9509938d6d88cfb50da7a89355ae784f3025f89112d5bcdee70b. 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/QZTV32382567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49e6daf437703649104736ab9e67d92b6300d89e837989e8d5443d54b11254c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2457764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646db792ac2730fe39024c56e89cc4a0a5df58cbc8ba0796c891087c0f84d93e. 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/QZMZ92429429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49266def11c88c064a1bd8bc80a4329f485c4158fc4cdec6a6e016eae47d1d3. 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/QZTRX2420574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b81218af57b2e256f6a2c12bd60edb61d6bcbddd547f4516aa0528ad2de74. 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/QZHZ32255313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbd1238655e82a1665b128899a611e0ab8d64c55cc71dbc0918fadd29d020fb. 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/QZGLS2165176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3c33a609c28546040c7faf4a309301ef0cebccd120e3cc21ac11e7abafc794. 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/QZTV32569507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e054422e0d5ca1cbce88afd33631bd07f5d178a08e6841a6da1b71f1f881b0. 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/US7VG2253444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e507aaedde9844793fed17afb795582711808e9421fb5902670ee28b4d33491. 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/GBRKQ2472079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e507aaedde9844793fed17afb795582711808e9421fb5902670ee28b4d33491. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBRKQ2472079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc6cac8f4b96793d7f2c0893577eba957636bd39daf7df5233aed0c12e3a10c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ5AB2176376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4563e2547048612561893f1484ae5432d5c5fe48874a7c102bca5c5756f749. 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/QZWDE2373784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824b3c7cc5c447da28dd8fe6aa131ce26c59bd8b55348bd348ff8616ac34f362. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ42182738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d12958e5d7ede872e614d82b30f663e8b093bcb54b5744f9c1753935036a2ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2211921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68123e71c9f9509938d6d88cfb50da7a89355ae784f3025f89112d5bcdee70b. 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/QZTV32382567.