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 0x75faf10d3435993f8182f47e0ef6b826ff615178dada6d3f7717dce335f9d696. 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/e93cb700-6f6a-423d-a209-17c29ef0493a.json and https://artists.proofprofile.net/proofs/artist/e93cb700-6f6a-423d-a209-17c29ef0493a.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 0x1e0832850a9215337f243825a60916f9b98a3926b1ab02616f51066a3535b19e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAGN2274653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe717e11aa5db0812a3c5aa0f9c2be951d0ad2198859f9793429eee837e79cb5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHA2300986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b92e9bc427bb239398711fb6fade72ece0e3181b6387036c454e4bf0c8cd8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAHH2306732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ddac207b6b84986b9986f9fb5c65c130de81079b6fdb49c364e2e09f73b1c3. 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/TCAHK2394122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc668c8f0d8cf25d89a1ca0e0bb028807ddcfccbb46fa009a89b4ffc77df2914c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NOX8G2301320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b4d33810f24c87bd1e4f2de54e8947af167f73c8630063e8d39885b2fe3594. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/USA2P2434959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a59ae0ce449c7b78d99e8567e0569ca863375ea878b420f6a469c31603a938. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAIT2401286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361d5a0f96deff2a0084173d00c7b9357ae963798331858968c23fee92e86b53. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NOX8G2400356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4d4bc53c17aff445d96ee21fff3babcd9fed91c1d9ebc183903548ed7f69bd. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAIV2491911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66f9e91b3a831491956ca6d3d1afd39035ba5e5cdf18f0a4dbcc2987feb49c5. 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/NOX8G2400483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e3d0a0e3222350f5d3104554f0992f476fce1b422400d4726ef77b1d88ceed. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NOX8G2400506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aec67efb5a07835c72665051161876831b8fb05ea31ec381d9fbcf75fa47790. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOX8G2400546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876558185eb5ae4b7ed23edd117d1f3102580f3a8be3d1f4e14343d0db950636. 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/NOX8G2400547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f73839f9727f30102d3010e8a22429547f56212014a239ca8495150d366580c. 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/NOX8G2400548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cedb4404b61d4c605a4ad9f28eff6c4b1a2ad846658e021969a6440093fe0a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:25:35Z), 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/NOX8G2500388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7407c3a6d169746ca91cd4b3894b01b9894a227e6804bf8acaeb853b0d1c598. 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/NOX8G2500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6692835843ab732333f19ea0f62895906e1b1ef9424151964852c7f1fd247d80. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NOX8G2500382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb7118cdc6016c2cc9c225122e5615ccd2876b2341faa769fec430ec4bff3dc. 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/NOX8G2500488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a5816015880b73af889421b4aa79b2d7c5c365936b2d07856dde6be990dc9f. 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/QZHN72306811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa0afb74fd58bfe66898dbfa6115e03c0b7c319f3415c560924b9cab475b048. 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/NOX8G2302009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf0c89924095360b576f74b12fb59bc0ff2c204dc4edceca8fdb8b0591787fd. 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/NOX8G2301910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16148d7c19e5daf058fbb6ab0102884cb35e88d704959412e98d81cdb2d91b11. 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/SE5BU2439885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc99354cc83af7834e56880c1543f11f54ed03ce64128e4f367b719a03b104c0. 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/QZK6P2446939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7234f9706a9e57834cbd537769a1ed1bffdd626b8584fa70ee52e0b2e7325055. 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/NOX8G2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6476f3adbf2a4ada0b2cf82f846f1b28d42b32077927285eeaca29660c741b4. 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/NOX8G2400394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf5a30acf47f7a1c825e54e87a9ca88150934317fe929762ade0b087e8b11ff. 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/NOX8G2301440.