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 0xf52368b683baf5207f9d3372c254713b1c59a0fe7781c778c56c7e8e01c827f5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b5a4688-c6b5-4cde-a288-79c1015801e9.json and https://artists.proofprofile.net/proofs/artist/7b5a4688-c6b5-4cde-a288-79c1015801e9.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 0xa9578428375abc45f54c81bf8a6635bb737daaf424e4b071c81e5996f4c72aa1. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAEG1955381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5439ef65967f933246a84cc564ca4023f5cc267fe5b74e0a5d8d8da4682c6c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAFK2150395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9863d3a8b334bd10ca4026a52e311b5a3f33d882255566da220b6ca95a2a5412. 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/TCAFL2101228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a5ac738c3804ad602e12da6def23568fa7d52e6bdb7ed3c7ae9cfc987e909b. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:11Z), 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/TCAFQ2132282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84727ca91ffd2bdf01b28dd0ee35adf28e864a957cdb25fa5d093eec67125c21. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAGA2285545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6996b7701c649ddc4d0b8a84cfb731a2c2e0b41313fc96813ce93f542001ebc. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:46:32Z), 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/TCAGA2285549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fef752ee2028718833ebf27e602c6d2256e1998b58c5e12a66b9748b9cddf7d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAGA2285572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2da43f97742323c8915ac8ccac5f66a1a8a09cca1a7910b936b9424b1d4999. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAGA2285627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcfc6e23707db12e48da6a97f35b7d576f20886059c0e5faffb1e4c2b179ba3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWT2335995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe234d2db0dc20e8af0db6b58541feaf9b2262f6a991c1504399cc1201e9161fd. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZNWT2335996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6795602d8a6831875e533c6197341bacc023f1955d524761e6cc3afed5c6b5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:58Z), 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/QZNWT2335997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596c5b9b19b920b7b4c40d1e920374f4b78e570a95b13a2faa48b42fcd86be05. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZNWT2335999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6837b7fdaa053b460dccb0d888bb919aef628a907c0425581e9ca15e56b5bf32. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:34Z), 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/QZNWT2336000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa68486d54b64ae5a15e1b523b2832d6db1f46812198f3622b10b4dc71bebe38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2313272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6222d05d4b41731866e638ce0d0b8835b4fb39d9d537bedbf5d554bcade710. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFN2324068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bcfeb7a0debb88c295cff212482a3420b5c0a4dc5e1e8ecad16aad66fa8a63. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFN2324070.