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 0x32b7a770bd98c1381a469e8fbcbd145a4b8b23dc59ebef7913ce478dd5de346e. 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/caca2a7b-accb-4f8c-8f19-23468d786c82.json and https://artists.proofprofile.net/proofs/artist/caca2a7b-accb-4f8c-8f19-23468d786c82.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 0x5c7f3ef0aec026a54218066f9a97140b9af5ce37e672a827a053af7d3bda28c9. 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/DGA072310886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bea3ba9a204c9ea4a0bb3ce4a3c5b49a1c6d929e0ebd976c94a6d4f3bada1b2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DGA072310887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca0487d83c6b5bc2b28c64d6caf8ea06500497fd2d49c6e4ab083a67446578. 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/DGA072310888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923362bed7786fa8c2bd157cd41ae1139a0187455b73b9f4aaaba916ecb1478b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA062377674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcba64c3db4ce63f4aea35d6857a557bc0a0cc7174bdb3d349245de5f5a222a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DGA072310889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c8c4d2b9545d8d28e96e4e6a5355937ce69f1faac520894f0712cd1cae8d26. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA072310891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e65b69a25ceb4d16c7431df536fb6c001718fc42fa34a367b3e6cd8f0cd3f9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:54:51Z), 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/DGA072310896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9a34de1dc3800356c33c61dfa59479091e7137416bdb12aaf5a3048a62ff63. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:46:48Z), 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/FR2X42487354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ff2f097878c7f0cfb4fe9424ef12cfc6d1901f08c081513fd272570673b72f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DGA092440243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdac076608d036ac5305d3b74448de7f22a53f5bd7df4eda2e4ad22a7410460. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DGA0Q2427448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7037b22d0858d040fbaf63eb7d8e9206fa6f6c1535f60a613155e1ee220cc26c. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DGA0T2455002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdac076608d036ac5305d3b74448de7f22a53f5bd7df4eda2e4ad22a7410460. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DGA0Q2427448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9a34de1dc3800356c33c61dfa59479091e7137416bdb12aaf5a3048a62ff63. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/FR2X42487354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ff2f097878c7f0cfb4fe9424ef12cfc6d1901f08c081513fd272570673b72f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA092440243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdac076608d036ac5305d3b74448de7f22a53f5bd7df4eda2e4ad22a7410460. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DGA0Q2427448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7037b22d0858d040fbaf63eb7d8e9206fa6f6c1535f60a613155e1ee220cc26c. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/DGA0T2455002.