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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cca966ba9ed7abc91053215a870587ccc4d76eee55e0df2c6f2c2ffec2ee7a. Chain 2 (Bitcoin): anchored in block 953722 (2026-06-15T01:21:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a92277d-53d5-47ca-ae51-159932103c93.json and https://artists.proofprofile.net/proofs/artist/8a92277d-53d5-47ca-ae51-159932103c93.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fb851eb40d2d3d4a127a42537fbb1ffd32f9e7c1b02f6e991ce4654c36f1a2. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/DELJ82015367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4609ed625a3d2ffc8001924775210528541f11aff18e82be474fa8da61ac21. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DELJ82019402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f606748523ff374cd6790e580697e707d9655103f175caded531a1994b775f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DENV31100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815d53c196cfd6bf74c269bff50647c98ebdf3da27ba4bf1c4f6e84df0ea8ada. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/DENV31100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1963a97c2e6d42b2b85ce8d36617ee236d258415fd27e3f3c059378333b15d5. 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/DEZC62318117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eb5cbe55e17bf8961adcbda12d9f44fc5ec7a4ff2b3b1d36fddadd263d84da. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/DEZC62318118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac63d853d889b736d7a1c1db6428fefdd04a4f1e249bd0e455630dd4d57c06. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEZC62589701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac63d853d889b736d7a1c1db6428fefdd04a4f1e249bd0e455630dd4d57c06. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEZC62589701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3314d7157781b6c095c9acb67264396789d011ecda284207ddebe09d3634a05a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DETY71700817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc496f4e97c3e7c0b7cacbc790666b7d18d560982b0620bc084ff826044b58e70. 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/DETY71700819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d14992f97f1876c72fbab42f57389a027e2adf57969afd0b68befcf721ba76. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/DETY71700820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43970f75c18222da14b41bf9a5eaa64a08d03b5ae2eb05064dbd7138af8d93f4. 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/DETY71700821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa0c0e66c76331628e62fed344b7c168c457686a69a2d9867b6c59dfcde9ea3. 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/DETY71700822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19551169c96fc302fd2cb8648dcf91ad8ad5c02906d46084b36f30432c4f7a7f. 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/DETY71700823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95a4bc858fb00812edf62b4bf953f490c259d12e93122600679017f04ad9d5. 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/DETY71700825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b56d7a26d9e51d2226725d156652f25f5552654f80c0c1d1dd428b4f088c17. 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/DETY71700826.