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 0xdb23212aeffd5bae5aceec8a2773b30db013c864780fe3905cb96aa7ff635300. 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/e7b6f9b1-816c-4f2b-8d2c-e5913d915f9c.json and https://artists.proofprofile.net/proofs/artist/e7b6f9b1-816c-4f2b-8d2c-e5913d915f9c.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 0xcf76b2644da5ee3394e104f9bfd20fd996f531adc8fbb9b740b0057dfa314614. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX6Y62400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45507101e47127376fc6fb6ece127c97bb34cc809704666d8692f83d37bd819. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZ5AB1807570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd490a7cfe582710c9dec47c129d9f2a5a923ea0856c7c1c2d303d22f11a690a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/BR5VT1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f0af4905cb52be635344abba7eae905ca902d30cf59012d34562d597570f76. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:23Z), 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/BR5VT1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe861304de0591d326df234e3feba613662e0f63c188f4c7cdf96d8ce3e8d196c. 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/BR5VT1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b4800d0ba8ec6f8d8219fa3c37dd4adbfeaf4c112d7b43a3b89b5da5727782. 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/BR5VT1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aade745cb735e7e8ae71848732451af23895ff4e8f357a0e71f3c878da810d1. 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/BR5VT1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839661b566e6173baee5c3dd532d6e4b189fc94725a4755e898955b80d8a8cae. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BXBRU1800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfc0184cb67a285321cf35109876b4333c8431147797a14859daf0295847182. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXQHQ2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb104548775b0bab9a62714b8a7f3544f2fff0b9cded2ae4adef813dc4783b87. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJY2460187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e15edb0e110101e1e1881e8e175dc97187aa3bf80cb28995188b94f3a60f4b. 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/QZ5AB1958565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cd3a239cd175db8bd9a16ef5db7fc5884b810ec9099342ab9bbe26ba1a7f37. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5AB1761126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd20d85e5617fbdf28b44eb876a564509f68edd0487a97bcdcb5e3dfe14acae7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRRGE2007787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ded8745caea3537986e3296a80286c8093489b7f78ebf35582a9426720e548d. 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/US7VG2015361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb97770831cb7d24e6671d95f167506cbbffcef0ceff346867dc82dabc0de1f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5AB2081750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd20d85e5617fbdf28b44eb876a564509f68edd0487a97bcdcb5e3dfe14acae7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRRGE2007787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a124705ea18c99481fbe93ba53e1ce662eb77340192eb5d6ab9caac91972f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRC1S1700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d195e7586723b4658b11d73af52623f2acef1b50baeebd0e0d82f772432d4d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTV32546117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2509108772d76c4b1a51273a2bc49abd3ccca860f7bcee007c0121188a58a7d0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BX7GY1900016.
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