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 0x6260b3ec4440946df10b2e7c606259e4acae7e0ba015bf1587a0055dec7e942b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c94f026-e032-4fea-8a70-5342109809a7.json and https://artists.proofprofile.net/proofs/artist/6c94f026-e032-4fea-8a70-5342109809a7.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 0xe993e5c7a1a7a64539849c52034c82354cb01071ea566e43e1d6e48e5b8ee524. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:29:57Z), 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/NLE850800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c65f56106736369c5a41e238e47451697e5909cc1ddbd829d3b391a12c0b65. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NLE850800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7363486a89e7780436f1debc1fb704b3d73a1a755894e2d01e85450430c64e50. 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/NLE851500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554c5fe17442a0a0eb22235d02f35e60b015deb337ac4d77d05b0191c36c2f0c. 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/NLE851600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f4d913894a0d914fda073027c94fd826dd43440169c7b89bd7d257869835ee. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:00Z), 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/NLE851600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81b38637352986a2913335935455c72b0edaa31bc1ea17a1afcd8c184fafc60. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:12Z), 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/NLE850800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9006d072839e582d9fa314f404911cf1162f25d32f501464a2ea2859d9b33ba7. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/NLE851300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc960cef3bebff454dcc32dc43aa8d24319ede15f652b1a1d88ccd7c31ba00e3f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLE851100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b2d1b903bb0c33653c3abc520bcc2f597328b97f2d55e11a712ef0db91a62. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/NLE852000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44219fa65f03ab1d42ae1dac729358e616475230f86c0dbe5604ebbb627dc55a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLE850500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad31c599a0131b0ef87c479e909c1877901f75b8aaa5167f982c7b86bd160db. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/NLE852000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9006d072839e582d9fa314f404911cf1162f25d32f501464a2ea2859d9b33ba7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLE851300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc960cef3bebff454dcc32dc43aa8d24319ede15f652b1a1d88ccd7c31ba00e3f. 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/NLE851100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b2d1b903bb0c33653c3abc520bcc2f597328b97f2d55e11a712ef0db91a62. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLE852000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e3832ab1005d94cb2959b17fce0edfb3f1bb482c9f72b3514c457eee3f6b86. 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/NLE852000043.