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 0x639ce67e1b6b5badb403c8037d22cd0668145c3d6c72520303f0c19917b81b58. 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/e4137e26-c259-4e0e-bc19-24d70eabaf49.json and https://artists.proofprofile.net/proofs/artist/e4137e26-c259-4e0e-bc19-24d70eabaf49.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 0x4181e6f44d7649e61b8887db132e12bf5cba4a9bcf5f4a3ed7c61d9c37eabef3. 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/TCAEP2066357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554fc6d7b2c048464b96497052fcc2c2ae6aeef4e78efdd98f99a7d58a6fdaf1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:54:11Z), 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/TCAFF2044430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb97d00e92e61a132a0db6dae4c410ed50adc28cfb4a0d228407902e1518d79. 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/TCAFM2112734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a3b3d58999d04aca0a5bc55af7dda26355c404d8624147efbc5ee7f9bcff8e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAFM2112740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedfccccb76bb8e6d56097f0e3b86d96a2ef8d1dd7a91ecd73c067aba7a2112f. 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/TCAFM2112748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc967b051ed42faec0d10eccea655ee8fcd654ff2d06242924a24a20257930ff5. 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/TCAFM2112755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ccf06c96ba9f1f685af611d7d8dd181db697489b4418dc5b6067d23b221947. 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/TCAFM2112764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b638875a6ab647b9d459c483f2cb13bc2d7bd7d0d265537b4bfcefc46c353e5. 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/QZMHK2270045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6611c4c1161b83e159eaad863891be49624b32504de600a04128ee3ca7975a1d. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZS652296833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bad1a4ab4834703faaafe07b5b95d3276e80c28c705659a1b176524c3d32ce. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZS642294576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73909cc817feb8e073fdb396c874c360bb28b296115368353c7b2609b0d57b59. 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/QZS642321857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aae8cadfcce3fb4190adadaab6f57d0cbaeb8f41c002d56c7e4e9a138386993. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QM42K2394910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1938de29eb8df9655249a234f464732f631f99e416928833073bad0e43f875. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QM42K2484807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ffb9474ac61fb847cf1a47f0a511bd2fbdc1abe1491421891853a81e53d63b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:52Z), 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/QZMHL2451224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c76d28cac3221e9a6510a6bc72937a5df0933900e61d3e6a9c115fc5a20f147. 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/QZKDK2529355.