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 0x0309e3428e9f3b513e6f53e43495245f3302e3ef25f1dcb738de78e0c12ea2c5. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfcdf5c1-4753-4ddf-b08f-9be63b38a9cd.json and https://artists.proofprofile.net/proofs/artist/dfcdf5c1-4753-4ddf-b08f-9be63b38a9cd.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 0x266a09a8b28dc818534bd18494367aee5153af0b67671ca7e9f1718af95a1a94. 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/QZWFL2517554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33a4032bb7caaa0ca3c3c5906ae59a6a0a697dc8d7dddc8ec4dee231f067e38. 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/QZWFL2517555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6307fcf6161f11612c17992f8364ac0ed742d46994e8a0e16960f6fc4b418246. 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/QZWFL2517556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadedd2ea183d545098676c3f01dc210f32b645164120a00df83b0f9c744f5a92. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:06:09Z), 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/QZWFL2517557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bdea7eadb1e33c97b41b02723a5efdbdf640c0744db77b3184b2a7702cdb6e. 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/QZWFL2517558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db08245f8f7b3767e7d3b6728fdbec48cf0429fae20f9641c94e4268e45d3e4. 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/QZWFL2517559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5910ecbfce1cbafa8296822614705b77d33833ce93858948bb240c731e9940bb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:05:04Z), 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/QZWFL2517560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcb67f7c30477880f65998cf3839f95408f4a1c03498fa7f164ce34967f181b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFL2517561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be15f98c2e27702735dfea7c6808a413737b192f140412b2078cb421f27aa7. 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/QZWFL2517562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237424d6c396b04636a87774d40b601c4e374f61eb5d336791d60be829eb3d3d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:38Z), 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/QZWFP2557948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6fb87433df838db95bd910d6280bb0aa771e20d77183eefc81f9810dac6499. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFP2557949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63b06f79df454e1fa6d333594cd51fb358e18dbd8196e1bdf7adc80b10d94ae. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:05:36Z), 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/QZWFP2557950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26878820b8cb811acfb682d907b3c557dd0b5802f372cbefbbb5d10729706f29. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFP2557951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf686264dcd62b1e28eddd7242065b45c29f012221b4c8ec398b4ddba971ff74. 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/QZWFP2557952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadb0e1048b5fe61fc2e480d190bf9bfab5c913c7a7d4c34dbe72d2136e36100. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFP2557953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfe9d533f3344fabe673dc7200e10d96a043341a074438ac68212d763cb6ace. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:13Z), 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/QZWFP2557954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b60a1f9f4a4ad505247249016e733c981baf82a3cf216fee836062ea79510b3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFP2557955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d06a452878d4aadce3cf2eac52bb590fa3cb6d9a6d59b2013944db217761659. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:56Z), 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/QZWFP2557956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a370a14864bb137aa735077b114c567838fb77e6780938308f4843154757df. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFP2557957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0915a76609b97f2e2bd8fc794a36ce738c7872bac4bb93c1b8b9a702c218ea7e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:20:34Z), 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/QZWFP2557958.