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 0x0cc085e7451ddfe2ac7c32b96ce3358ec5cc013c791d14dcfa4ea11d32ca4e42. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6b5fd8c-9de0-4138-a736-c63007eed511.json and https://artists.proofprofile.net/proofs/artist/e6b5fd8c-9de0-4138-a736-c63007eed511.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 0xef188be328b4434ae2b718e9560c6e52f513f0e4c69097073b3c88fe8a732715. 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/TCAIZ2423682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99138719d977e1bb62860430fb2e637737e753dc8c6a1ca65627f451688f623. 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/TCAIZ2423687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16757ac284cab5a83ea839dc286e29b7e0e936ecf4dcfe686d6c967ebf21db17. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAJA2423715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd467b61eba9948962972d1ab81d791c7268184289dc763be19801c13756290f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAIZ2423717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2877f5637367ab7252ba77c9c43f5275877e7f7c5b62cc063e7e01c92ac9c1fa. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJA2423723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf370af32a4c770ebcb7730c2189ea79d92f1310a0831f2600fd91dc7d432044e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAIZ2423731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e305a5a3d9519dbfbb67c40dd30a41dd499546a59cadfadd5a441737379b338. 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/TCAIZ2423737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07d03c8dcef2a6d4b8e41022d6aa22a614f375bf07303acdb9a4903a740d695. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:00Z), 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/TCAIZ2423738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7ffffa917b64959b292083e9c92b6e78031199ec615437d6fe1e019e2d562a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIZ2423745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7e64db20a272c1a94808459d248efbe470d9e027c39eabdf225711c275f418. 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/TCAIZ2418808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cebf4cc9c67aedcd1d4b23fbcdf98cab67d23616e6a72181cc98ff7aef731ff. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIZ2418815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4182f7d3bf43c39954113375539a1b0736f5819dd889f634d64a1f4fbb21ba5. 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/TCAIZ2418820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a70de6f56b76d1aa21ef1915631a30d3ded770fbf35f6820dff13a6bad9f9e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:33:47Z), 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/TCAIZ2418829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb311641c7ddf9d991e529c27a84a1dbae6468a2cc11c0c18967818f7a41d4923. 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/TCAIZ2418832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5004433c2f1ef9870ba68434946c01aa9e93637651dd5ed5350edd20c302c896. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAIZ2418835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22650d78089456a53f41512963d21cf3b62af6d69726f8fe53c253a7b67d6735. 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/TCAIZ2418839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050586d1d1b85212a10f24c20e6fa1f53dd8630acb2c081ed6f23d160c2c8c20. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:20Z), 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/TCAIZ2418840.