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 0x6039df358e4ba9b3692ec8b148c4d901868d157cc5ece191691029de780f81b9. 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/8e6c85aa-3e63-442a-8e8d-78cce41b9d79.json and https://artists.proofprofile.net/proofs/artist/8e6c85aa-3e63-442a-8e8d-78cce41b9d79.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 0x9a44eff00cd5e70cd8c07d8f61776bd6e69cda9e7d989dfc4d3d48f57bbb3c73. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEQ2374263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afc07403c77779c10d205570be343ffb53c101141319c33e68d813064c58909. 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/QZDA52409592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ee1567f0998fac807bfcf782a0c4eb6d29438ec6cd47387bfe1d426a693380. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA52409593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5917ce5cefbcd79ac255751df9a4edc9e8bbac66cec3636d7d32cc92c40d77. 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/QZDA52409594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8527c3b9eaae55723d16bfa2e658b9883e859ac8a87821a105adf21f27fdba96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA52409595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe042a6c2d1975570dee3286d4adf56249d47abd07f86967d7a7bb7d16e7eb8a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:08Z), 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/QZDA52409596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45465ca37c1f6926dfb4d9df33ca7d8f4084aee163d21f3e4324d94c20d5f321. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB32424342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693e2cecdbd949691ee3d7ab1802030303a1c497e7dbe3c0af69650f729db1f6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:42:11Z), 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/QZTB32424343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa3c5ca4547d0bed1f2046f59d5532fafb2068f6cf2558eeac06f8f47df5e6. 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/QZWFQ2480340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9918b4068cb5a5a2d69b9abca2394907d63e6cd86e74591b2ff735c3e35e8d. 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/QZZ782465699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ee5639746a6a434e8e1f6951f0231d75fe5b3fee23e7e1430f8fb34a64b8f6. 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/QZK6P2545602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0374f82b319b954ce0acc12d7c9a1f1eb4aa666db77b05489559c0d2d6ce7d0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6P2545603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e2658f81c1f2976560d1aab91b945dccaf66b61a8e78aaff82256b0fef573f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6P2545604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa3c5ca4547d0bed1f2046f59d5532fafb2068f6cf2558eeac06f8f47df5e6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFQ2480340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b721f9c24c56795f87f7673c144bd06eaaba0f8d6763d4598bec60bc4a2a30. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:47Z), 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/QZES82541581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959cb4e4ad929a1f8d4f6f3275c8a0d11c94876b76764efe67ab37fdaeb8ffae. 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/QZWFL2561386.