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 0xfdd9e81d89fc5d3b1d6f5c53212c426b49470c316e39773de52c5247a81ffd99. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c049f364-5f43-4783-a228-b0898d1c6cca.json and https://artists.proofprofile.net/proofs/artist/c049f364-5f43-4783-a228-b0898d1c6cca.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 0xa22a83a194c854ebc555f4fa9f632386b08ff284d8dfb1a4422e73affd0c337f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2576547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0560b5cc3ab90af79d404d59a0c01543840d4bc0edbfaf1e6ed260e215d41b80. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:17Z), 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/QZGLM2576123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04719f7bbef10594ffb54984e605327a6ca73d814c8ab16d5d265bcae25f5ffe. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZGLM2575968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7442082fd4d83eaa74d94b564cc26710276454d537e0231333e21f2ca018a3a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:53:36Z), 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/QZGLM2576159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536ea2d6e43b974eefcab3a4fbcc686940d1547e50876fbef8878e540657287a. 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/QZGLM2576177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c49aa03ceaad5e561d1fb5d004270dcd9c78bf9b1b9b72c5a88c3452fa63714. 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/QZGLM2576087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe277a0d0e06aece8f3ca3dfd828fca6b980f23a1f17cb85132b8ef95f14ecfc6. 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/QZGLM2576060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07f94a52a935306f40977dfdea5b56222465d60544495592afd03b4930395c1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2576571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a098d57cfa2669a37d26bd65b622386f9448bc9773773eec896685acb25111. 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/QZGLM2576548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde767edf1a7b91f7431b7d5a0152e81134412d4f9ffe7765fe691d979419e8a6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:19:41Z), 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/QZGLM2577018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5429258a8146158c8bf233c721370016afcafeac4974c903e4c44f6f5cd68902. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZGLM2577008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78f8a7018763943e4a757e0464fb11fd8dfb4d0f2b7b38fef3eb07fa1b678b9. 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/QZGLM2577011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9841c3536e4caeec18736d698e090dc01c4d98ea392380d7f10fa7dbd5e1dbf1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZGLM2577069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8d5052324d3b974878d9df4718d3cbf47454a837f4be5609f285db5d6aa7ec. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZGLM2577199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba77e008fd128420d799673a419e257ffcd7c9947db13b7e4644b4299821af46. 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/QZGLM2577032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa9a77bf4199b3aecd3c0eec00601697596bd60123ffb85f26433ebbf0d85b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2577037.