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 0x0c59fb69a8a4ec0ebde66456b86dc10f0d6975ed8891c72e7930121513ae2d7c. 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/d8b84c18-2570-4777-b1a5-cd061b59196f.json and https://artists.proofprofile.net/proofs/artist/d8b84c18-2570-4777-b1a5-cd061b59196f.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 0xb44b5f8e95aef7dfc0ff568549eb679526eb9e78a7fade04481e05fc575d1d2f. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:30:38Z), 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/ITBHZ1500944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003fa3c32a2409d7ae36f340830305f7116ba4b59644ce600eb157bc9ec8cc58. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV62303263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9299646db7162db0bd28e58314ec9d47a4676f55210493be175bbe4b3e7aab20. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62303264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124647c94d96c4e2eb2fec7a7ee633b701b15e3906ac939b92667255698db3cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV62303265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7cc855085912182fef5201c997f247c69fe8d026a6d0599ded7e347c9d845. 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/BXG9S2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcf698df0bc62dca70866f06b2ae3942b3e2f441e7f78e011ac8e890b361cca. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/GBK6Y2451333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff81be53182a5f2aa8cbceb1c0d1f68d07ed33a4a9ef86e72c98c4411c2f1022. 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/ITA061302738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d525ebcbcd96880bce011292ea4da92e6a221ac3131b92a631dc4df6f80aa6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZEB2423236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1727eb4d820ea3926b6b9c02acce3756db4eff80feef415c73dc6c74628dade4. 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/QZZEB2423216.
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 0x591f914d0b7fa5d18bb4267d9c73d9067125bc2ce3e80c23b9747c0c125b6f90. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZZEB2423230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4d9069b32c50da96daefad76977a8d11d5dd0af9de4eebb5efc10b6d5de895. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:21Z), 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/GBKQU2505683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc273be41cd9fea9f33c1adc88b8512245cb55a2bd85d0ee6f1abb09cdccc8b9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:03Z), 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/ITA061302830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab51384367b71f921419ef98c2f6867125c33bd6824738dd6ae7d4ede97b888c. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/ITA061302831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fee8e2b3b0bd49719471dde243c214e814069270182ab174f419328e457a96. 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/GBKQU2535870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e55d98dbfc8742e1dcf91ff3a833da070eaa75a61f75ae8f2abe79b8d34a68a. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GBKQU2552487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf2b73332e1bcad63560b11cd6d7d8714e9bac1284794bbfbfdbd965d862e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITBHZ1501003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7cc855085912182fef5201c997f247c69fe8d026a6d0599ded7e347c9d845. 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/BXG9S2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75adc9083f7a449659d12b84150bfcb7cf18c3764a2177d92e6078cfde8b0a7a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2435737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e9b7a7b4c622301d5d3cedb6121a6000642887788c813e68c51ac124c8ec3b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2429241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a75a438128eee3752237e2c69d7d33377dd8528a364c4a8d6679e623af48a. 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/GBKQU2353830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1200baee97f4a05421494d5ca845980873537fe609c02956f109192cb8c9f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES94G2300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa4337f8d6c93d4f95456140dd894172daf2caddd375229ceb54140e3df1e11. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ITBHZ1501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c39f000cfe63eb8f8ab13892fde1e04191169ebd5c6d935fe25aca607017be. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBKQU2353829.